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Ji S, Zeng M, Zhan X, Liu H, Zhou Y, Wang K, Yan Y, Yao J, Zhao YS. Exceptionally High- glum Circularly Polarized Lasers Empowered by Strong 2D-Chiroptical Response in a Host-Guest Supramolecular Microcrystal. J Am Chem Soc 2024. [PMID: 39102645 DOI: 10.1021/jacs.4c06903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
Circularly polarized (CP) lasers hold tremendous potential for advancing spin information communication and display technologies. Organic materials are emerging candidates for high-performance CP lasers because of their abundant chiral structures and excellent gain characteristics. However, their dissymmetry factor (glum) in CP emission is typically low due to the weak chiral light matter interactions. Here, we presented an effective approach to significantly amplifying glum by leveraging the intrinsic 2D-chiroptical response of an anisotropic organic supramolecular crystal. The organic complex microcrystal was designed to exhibit large 2D-chiroptical activities through strong coupling interactions between their remarkable linear birefringence (LB) and high degree of fluorescence linear polarization. Such 2D-chiroptical response can be further enhanced by the stimulated emission resulted from an increased degree of linear polarization, yielding a nearly pure CP laser with an exceptionally high glum of up to 1.78. Moreover, exploiting the extreme susceptibility of LB to temperature, we demonstrate a prototype of temperature-controlled chiroptical switches. These findings offer valuable insights for harnessing organic crystals to facilitate the development of high-performance CP lasers and other chiroptical devices.
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Affiliation(s)
- Shiyang Ji
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Zeng
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xiuqin Zhan
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Haidi Liu
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yifan Zhou
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kang Wang
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yongli Yan
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jiannian Yao
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Sheng Zhao
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
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2
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Shumilin AV, Shamirzaev TS, Smirnov DS. Spin Light Emitting Diode Based on Exciton Fine Structure Tuning in Quantum Dots. PHYSICAL REVIEW LETTERS 2024; 132:076202. [PMID: 38427866 DOI: 10.1103/physrevlett.132.076202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 01/17/2024] [Indexed: 03/03/2024]
Abstract
We propose a concept of quantum dot based light emitting diode that produces circularly polarized light without magnetic contacts due to the hyperfine interaction at the crossing of the exciton levels in a weak magnetic field. The electroluminescence circular polarization degree can reach 100%. The concept is compatible with the micropillar cavities, which allows for the generation of single circularly polarized photons. Second order photon correlation function includes information about the nuclear spin dynamics in the quantum dot, and the nuclear spin state can be purified by the quantum measurement backaction.
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Affiliation(s)
- A V Shumilin
- Ioffe Institute, 194021 St. Petersburg, Russia
- Complex Matter Department, Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - T S Shamirzaev
- Rzhanov Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - D S Smirnov
- Ioffe Institute, 194021 St. Petersburg, Russia
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3
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Liu X, Wang K, Zhang T, Liu H, Ren A, Ren S, Li P, Zhang C, Yao J, Zhao YS. Exciton Chirality Transfer Empowers Self-Triggered Spin-Polarized Amplified Spontaneous Emission from 1D-Anchoring-3D Perovskites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2305260. [PMID: 37754067 DOI: 10.1002/adma.202305260] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 09/22/2023] [Indexed: 09/28/2023]
Abstract
Spin-polarized lasers, arising from stimulated emission of imbalanced spin populations, play a vital role in spin-optoelectronics. It is usually tackled by external spin injection, inevitably suffering from additional losses across the barriers from injection sources to gain materials. Herein, spin-polarized coherent light emission is self-triggered from the 1D-anchoring-3D perovskites, where the imbalanced populations in achiral 3D perovskites are endowed with the spin selectivity of exciton chirality (EC) underpinned by chiral 1D perovskites. Efficient transfer of EC is enabled by rapid energy transfer, thereby creating an imbalance of the spin population of excited states. Stimulated emission of such populations brings self-triggered spin-polarized amplified spontaneous emission in the composite perovskites, yielding a higher degree of polarization (DOP) than that based on optical spin injection into bare achiral 3D perovskites. Chemical diversity of composite perovskites not only enables to adjust band gap for broadband output of spin-polarized light signals but also promises to manipulate radiative decay and spin relaxation toward remarkably increased DOP. These results highlight the importance of EC transfer mechanism for spin-polarized lasing and represent a crucial step toward the development of chiral-spintronics.
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Affiliation(s)
- Xiaolong Liu
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Kang Wang
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Tongjin Zhang
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Haidi Liu
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ang Ren
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shizhe Ren
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Penghao Li
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chuang Zhang
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiannian Yao
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yong Sheng Zhao
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
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4
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Huma T, Hakimi N, Younis M, Huma T, Ge Z, Feng J. MgO Heterostructures: From Synthesis to Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2668. [PMID: 35957098 PMCID: PMC9370122 DOI: 10.3390/nano12152668] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/18/2022] [Accepted: 07/28/2022] [Indexed: 02/04/2023]
Abstract
The energy storage capacity of batteries and supercapacitors has seen rising demand and problems as large-scale energy storage systems and electric gadgets have become more widely adopted. With the development of nano-scale materials, the electrodes of these devices have changed dramatically. Heterostructure materials have gained increased interest as next-generation materials due to their unique interfaces, resilient structures and synergistic effects, providing the capacity to improve energy/power outputs and battery longevity. This review focuses on the role of MgO in heterostructured magnetic and energy storage devices and their applications and synthetic strategies. The role of metal oxides in manufacturing heterostructures has received much attention, especially MgO. Heterostructures have stronger interactions between tightly packed interfaces and perform better than single structures. Due to their typical physical and chemical properties, MgO heterostructures have made a breakthrough in energy storage. In perpendicularly magnetized heterostructures, the MgO's thickness significantly affects the magnetic properties, which is good news for the next generation of high-speed magnetic storage devices.
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Affiliation(s)
- Tabasum Huma
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; (T.H.); (N.H.); (Z.G.)
| | - Nadimullah Hakimi
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; (T.H.); (N.H.); (Z.G.)
| | - Muhammad Younis
- Department of Polymeric Materials, School of Materials Science and Engineering, Beijing Institute of Technology, No. 5, Zhongguancun South Street, Beijing 100081, China;
| | - Tanzeel Huma
- Yale School of Medicine, Yale University, New Haven, CT 06520, USA;
| | - Zhenhua Ge
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; (T.H.); (N.H.); (Z.G.)
| | - Jing Feng
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; (T.H.); (N.H.); (Z.G.)
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5
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Tang B, Li G, Ru X, Gao Y, Li Z, Shen H, Yao HB, Fan F, Du J. Evaluating Lead Halide Perovskite Nanocrystals as a Spin Laser Gain Medium. NANO LETTERS 2022; 22:658-664. [PMID: 34994571 DOI: 10.1021/acs.nanolett.1c03671] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Spin-polarized charge endows conventional lasers with not only new functionalities but also reduced lasing thresholds thanks to the lifting of spin degeneracy. II-VI and III-V semiconductors have been extensively investigated as spin laser gain mediums; however, the degree of polarization is limited by the light hole and heavy hole degeneracy. Herein, we evaluate the potential of CsPbBr3 nanocrystals─ones that are featured with low band-edge degeneracy and therefore a high degree of polarization as a result of inverted band structure and large spin-orbit coupling─as a gain medium for spin lasers. Our experiment and numerical modeling results reveal that, within the spin relaxation lifetime, the optical gain threshold can be depressed by polarizing the charge using circularly polarized photoexcitation. However, prolonging the spin relaxation lifetime is required to realize a spin laser.
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Affiliation(s)
- Beibei Tang
- CAS Key Laboratory of Microscale Magnetic Resonance and ‡School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
- CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Guihai Li
- CAS Key Laboratory of Microscale Magnetic Resonance and ‡School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
- CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Xuechen Ru
- Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
- Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Yan Gao
- Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, China
- National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, Henan University, Kaifeng 475004, China
- Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Zidu Li
- CAS Key Laboratory of Microscale Magnetic Resonance and ‡School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
- CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Huaibin Shen
- Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, China
- National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, Henan University, Kaifeng 475004, China
- Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Hong-Bin Yao
- Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
- Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Fengjia Fan
- CAS Key Laboratory of Microscale Magnetic Resonance and ‡School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
- CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Jiangfeng Du
- CAS Key Laboratory of Microscale Magnetic Resonance and ‡School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
- CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
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6
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Hara K, Morimoto A, Matsudaira K, Suzuki S, Yagi S, Fujiki M, Imai Y. External Magnetic Field Driven, Ambidextrous Circularly Polarized Electroluminescence from Organic Light Emitting Diodes Containing Racemic Cyclometalated Iridium(III) Complexes. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202100253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kengo Hara
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University 3-4-1 Kowakae, Higashi-Osaka Osaka 577–8502 Japan
| | - Ami Morimoto
- Department of Applied Chemistry Graduate School of Engineering Osaka Prefecture University 1-1 Gakuen-cho, Naka-ku, Sakai Osaka 599–8531 Japan
| | - Kana Matsudaira
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University 3-4-1 Kowakae, Higashi-Osaka Osaka 577–8502 Japan
| | - Satoko Suzuki
- JASCO Corporation 2967-5 Ishikawa, Hachioji Tokyo 192–8537 Japan
| | - Shigeyuki Yagi
- Department of Applied Chemistry Graduate School of Engineering Osaka Prefecture University 1-1 Gakuen-cho, Naka-ku, Sakai Osaka 599–8531 Japan
| | - Michiya Fujiki
- Graduate School of Science and Technology Nara Institute of Science and Technology 8916-5 Takayama, Ikoma Nara 630–0192 Japan
| | - Yoshitane Imai
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University 3-4-1 Kowakae, Higashi-Osaka Osaka 577–8502 Japan
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7
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Abstract
III-nitride light-emitting devices have been subjects of intense research for the last several decades owing to the versatility of their applications for fundamental research, as well as their widespread commercial utilization. Nitride light-emitters in the form of light-emitting diodes (LEDs) and lasers have made remarkable progress in recent years, especially in the form of blue LEDs and lasers. However, to further extend the scope of these devices, both below and above the blue emission region of the electromagnetic spectrum, and also to expand their range of practical applications, a number of issues and challenges related to the growth of materials, device design, and fabrication need to be overcome. This review provides a detailed overview of nitride-based LEDs and lasers, starting from their early days of development to the present state-of-the-art light-emitting devices. Besides delineating the scientific and engineering milestones achieved in the path towards the development of the highly matured blue LEDs and lasers, this review provides a sketch of the prevailing challenges associated with the development of long-wavelength, as well as ultraviolet nitride LEDs and lasers. In addition to these, recent progress and future challenges related to the development of next-generation nitride emitters, which include exciton-polariton lasers, spin-LEDs and lasers, and nanostructured emitters based on nanowires and quantum dots, have also been elucidated in this review. The review concludes by touching on the more recent topic of hexagonal boron nitride-based light-emitting devices, which have already shown significant promise as deep ultraviolet and single-photon emitters.
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8
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Zhang K, Zhao J, Hu Q, Yang S, Zhu X, Zhang Y, Huang R, Ma Y, Wang Z, Ouyang Z, Han J, Han Y, Tang J, Tong W, Zhang L, Zhai T. Room-Temperature Magnetic Field Effect on Excitonic Photoluminescence in Perovskite Nanocrystals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008225. [PMID: 34114270 DOI: 10.1002/adma.202008225] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 04/13/2021] [Indexed: 06/12/2023]
Abstract
Magnetic-field-enhanced spin-polarized electronic/optical properties in semiconductors are crucial for fabricating various spintronic devices. However, this spin polarization is governed by weak spin exchange interactions and easily randomized by thermal fluctuations; therefore, it is only produced at cryogenic temperatures, which severely limits the applications. Herein, a room-temperature intrinsic magnetic field effect (MFE) on excitonic photoluminescence is achieved in CsPbX3 :Mn (X = Cl, Br) perovskite nanocrystals. Through moderate Mn doping, the MFE is enhanced by exciton-Mn interactions, and through partial Br substitution, the MFE is stabilized at room temperature by exciton orbital ordering. The orbital ordering significantly enhances the g-factor difference between electrons and holes, which is evidenced by a parallel orbit-orbit interaction among excitons generated by circular polarized laser excitation. This study provides a clear avenue for engineering spintronic materials based on orbital interactions in perovskites.
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Affiliation(s)
- Kun Zhang
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Jian Zhao
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Qingsong Hu
- Wuhan National Laboratory of Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Sijie Yang
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Xixiang Zhu
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Yaqi Zhang
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Ruiqin Huang
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Yongfu Ma
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Zhongwen Ouyang
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Junbo Han
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Yibo Han
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Jiang Tang
- Wuhan National Laboratory of Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Wei Tong
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Science, Hefei, Anhui, 230031, P. R. China
| | - Lei Zhang
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Science, Hefei, Anhui, 230031, P. R. China
| | - Tianyou Zhai
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
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9
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Chuang C, Matsunaga M, Wang TH, Roy P, Ravindranath R, Ananthula M, Aoki N. Investigation of plant leaf-derived graphene quantum dot clusters via magnetic force microscopy. NANOTECHNOLOGY 2021; 32:245704. [PMID: 33755593 DOI: 10.1088/1361-6528/abeadb] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Magnetic force microscopy (MFM) is utilized to characterize the magnetic moment in nanostructured plant leaf-derived graphene quantum dot clusters (GQDCs). The MFM signal reveals that the magnetic response of the GQDCs depends on the height and width of the GQDCs. However, individual GQDs, and smaller clusters with widths of less than 20 nm, have not shown any observable magnetic signal. Importantly, experimental analyses suggest that the magnetic signal of GQDCs distributed in a plane can be effectively detected at room temperature. These results could pave the way for future graphene-based magnetic storage media and spin manipulation quantum devices.
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Affiliation(s)
- Chiashain Chuang
- Department of Electronic Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Masahiro Matsunaga
- Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
| | - Tian-Hsin Wang
- Department of Electronic Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Prathik Roy
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Rini Ravindranath
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Meenakshi Ananthula
- Department of Electronic Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Nobuyuki Aoki
- Department of Materials Science, Chiba University, Chiba 263-8522, Japan
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10
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Deb S, Dhar S. Spin transport in polarization induced two-dimensional electron gas channel in c-GaN nano-wedges. Sci Rep 2021; 11:5277. [PMID: 33674637 PMCID: PMC7935858 DOI: 10.1038/s41598-021-84451-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 02/16/2021] [Indexed: 11/23/2022] Open
Abstract
A two-dimensional electron gas (2DEG), which has recently been shown to develop in the central vertical plane of a wedge-shaped c-oriented GaN nanowall due to spontaneous polarization effect, offers a unique scenario, where the symmetry between the conduction and valence band is preserved over the entire confining potential. This results in the suppression of Rashba coupling even when the shape of the wedge is not symmetric. Here, for such a 2DEG channel, relaxation time for different spin projections is calculated as a function of donor concentration and gate bias. Our study reveals a strong dependence of the relaxation rate on the spin-orientation and density of carriers in the channel. Most interestingly, relaxation of spin oriented along the direction of confinement has been found to be completely switched off. Upon applying a suitable bias at the gate, the process can be switched on again. Exploiting this fascinating effect, an electrically driven spin-transistor has been proposed.
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Affiliation(s)
- Swarup Deb
- Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Subhabrata Dhar
- Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
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11
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Peng Y, Luo Y, Zhou W, Zhong X, Yin Y, Tang D, Zou B. Photoluminescence and Boosting Electron-Phonon Coupling in CdS Nanowires with Variable Sn(IV) Dopant Concentration. NANOSCALE RESEARCH LETTERS 2021; 16:19. [PMID: 33512585 PMCID: PMC7846655 DOI: 10.1186/s11671-021-03485-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
High-quality Sn(IV)-doped CdS nanowires were synthesized by a thermal evaporation route. Both XRD and Raman scattering spectrum confirmed the doping effect. The room temperature photoluminescence (PL) demonstrated that both near bandgap emission and discrete trapped-state emission appeared simultaneously and significantly, which were attributed to the strong exciton trapping by impurities and electron-phonon coupling during the light transportation. The PL intensity ratio of near bandgap emission to trapped-state emission could be tune via doped Sn(IV) concentration in the CdS nanowires. It is interesting that the trapped-state emission shows well separated peaks with the assistance of 1LO, 2LO, 4LO phonons, demonstrating the boosting electron-phonon coupling in these doped CdS nanowires. The influence of Sn(IV) dopant is further revealed by PL lifetime decay profile. The optical micro-cavity also plays an important role on this emission process. Our results will be helpful to the understanding of doping modulated carrier interaction, trapping and recombination in one-dimensional (1D) nanostructures.
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Affiliation(s)
- Yuehua Peng
- School of Physics and Electronics, Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Yuan Luo
- School of Physics and Electronics, Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Weichang Zhou
- School of Physics and Electronics, Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, People's Republic of China.
| | - Xuying Zhong
- School of Physics and Electronics, Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Yanling Yin
- School of Physics and Electronics, Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Dongsheng Tang
- School of Physics and Electronics, Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, People's Republic of China.
| | - Bingsuo Zou
- School of Physical Science and Technology, MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, Guangxi University, Nanning, 530004, People's Republic of China.
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12
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High Circular Polarized Nanolaser with Chiral Gammadion Metal Cavity. Sci Rep 2020; 10:7880. [PMID: 32398835 PMCID: PMC7217972 DOI: 10.1038/s41598-020-64836-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 12/16/2019] [Indexed: 11/08/2022] Open
Abstract
We demonstrate a circularly polarized laser with the metal-gallium-nitride gammadion nanocavities. The ultraviolet lasing signal was observed with the high circular dichroism at room temperature under pulsed optical pump conditions. Without external magnetism which breaks the time-reversal symmetry to favor optical transitions of a chosen handedness, the coherent outputs of these chiral nanolasers show a dissymmetry factor as high as 1.1. The small footprint of these lasers are advantageous for applications related to circularly polarized photons in future integrated systems, in contrast to the bulky setup of linearly-polarized lasers and quarter-wave plates.
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Gao X, Yang B, Devaux X, Yang H, Liu J, Liang S, Stoffel M, Pasquier L, Hyot B, Grenier A, Bernier N, Migot S, Mangin S, Rinnert H, Jiang C, Zeng Z, Tang N, Sun Q, Ding S, Yang H, Lu Y. Evidence of a strong perpendicular magnetic anisotropy in Au/Co/MgO/GaN heterostructures. NANOSCALE ADVANCES 2019; 1:4466-4475. [PMID: 36134416 PMCID: PMC9416972 DOI: 10.1039/c9na00340a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 09/29/2019] [Indexed: 06/16/2023]
Abstract
We report a strong perpendicular magnetic anisotropy (PMA) in Au/Co/MgO/GaN heterostructures from both experiments and first-principles calculations. The Au/Co/MgO heterostructures have been grown by molecular beam epitaxy (MBE) on GaN/sapphire substrates. By carefully optimizing the growth conditions, we obtained a fully epitaxial structure with a crystalline orientation relationship Au(111)[1̄10]//Co(0001)[112̄0]//MgO(111)[101̄]//GaN(0002)[112̄0]. More interestingly, we demonstrate that a 4.6 nm thick Co film grown on MgO/GaN still exhibits a large perpendicular magnetic anisotropy. First-principles calculations performed on the Co (4ML)/MgO(111) structure showed that the MgO(111) surface can strongly enhance the magnetic anisotropy energy by 40% compared to a reference 4ML thick Co hcp film. Our layer-resolved and orbital-hybridization resolved anisotropy analyses helped to clarify that the origin of the PMA enhancement is due to the interfacial hybridization of O 2p and Co 3d orbitals at the Co/MgO interface. The perpendicularly magnetized Au/Co/MgO/GaN heterostructures are promising for efficient spin injection and detection in GaN based opto-electronics without any external magnetic field.
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Affiliation(s)
- Xue Gao
- School of Nano Technology and Nano Bionics, University of Science and Technology of China 96 Jinzhai Road Baohe Hefei 230026 P. R. China
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Baishun Yang
- Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
| | - Xavier Devaux
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
| | - Hongxin Yang
- Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
| | - Jianping Liu
- School of Nano Technology and Nano Bionics, University of Science and Technology of China 96 Jinzhai Road Baohe Hefei 230026 P. R. China
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Shiheng Liang
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
| | - Mathieu Stoffel
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
| | - Ludovic Pasquier
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
| | | | | | | | - Sylvie Migot
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
| | - Stéphane Mangin
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
| | - Hervé Rinnert
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
| | - Chunping Jiang
- School of Nano Technology and Nano Bionics, University of Science and Technology of China 96 Jinzhai Road Baohe Hefei 230026 P. R. China
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Zhongming Zeng
- School of Nano Technology and Nano Bionics, University of Science and Technology of China 96 Jinzhai Road Baohe Hefei 230026 P. R. China
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Ning Tang
- School of Physics, Peking University 100871 Beijing P. R. China
| | - Qian Sun
- School of Nano Technology and Nano Bionics, University of Science and Technology of China 96 Jinzhai Road Baohe Hefei 230026 P. R. China
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Sunan Ding
- School of Nano Technology and Nano Bionics, University of Science and Technology of China 96 Jinzhai Road Baohe Hefei 230026 P. R. China
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Hui Yang
- School of Nano Technology and Nano Bionics, University of Science and Technology of China 96 Jinzhai Road Baohe Hefei 230026 P. R. China
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Yuan Lu
- Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198 campus ARTEM, 2 Allée André Guinier 54011 Nancy France
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Chen S, Huang Y, Visser D, Anand S, Buyanova IA, Chen WM. Room-temperature polarized spin-photon interface based on a semiconductor nanodisk-in-nanopillar structure driven by few defects. Nat Commun 2018; 9:3575. [PMID: 30177701 PMCID: PMC6120900 DOI: 10.1038/s41467-018-06035-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 08/13/2018] [Indexed: 11/24/2022] Open
Abstract
Owing to their superior optical properties, semiconductor nanopillars/nanowires in one-dimensional (1D) geometry are building blocks for nano-photonics. They also hold potential for efficient polarized spin-light conversion in future spin nano-photonics. Unfortunately, spin generation in 1D systems so far remains inefficient at room temperature. Here we propose an approach that can significantly enhance the radiative efficiency of the electrons with the desired spin while suppressing that with the unwanted spin, which simultaneously ensures strong spin and light polarization. We demonstrate high optical polarization of 20%, inferring high electron spin polarization up to 60% at room temperature in a 1D system based on a GaNAs nanodisk-in-GaAs nanopillar structure, facilitated by spin-dependent recombination via merely 2–3 defects in each nanodisk. Our approach points to a promising direction for realization of an interface for efficient spin-photon quantum information transfer at room temperature—a key element for future spin-photonic applications. Room-temperature spin-generation in 1D systems like semiconductor nanopillars is typically inefficient. Here, the authors demonstrate an approach to achieve efficient spin polarization, even in the absence of a magnetic field, by selectively enhancing the radiative efficiency of one spin direction.
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Affiliation(s)
- Shula Chen
- Department of Physics, Chemistry and Biology, Linköping University, SE58183, Linköping, Sweden.
| | - Yuqing Huang
- Department of Physics, Chemistry and Biology, Linköping University, SE58183, Linköping, Sweden
| | - Dennis Visser
- Department of Applied Physics, KTH Royal Institute of Technology, SE16440, Kista, Stockholm, Sweden
| | - Srinivasan Anand
- Department of Applied Physics, KTH Royal Institute of Technology, SE16440, Kista, Stockholm, Sweden
| | - Irina A Buyanova
- Department of Physics, Chemistry and Biology, Linköping University, SE58183, Linköping, Sweden
| | - Weimin M Chen
- Department of Physics, Chemistry and Biology, Linköping University, SE58183, Linköping, Sweden.
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Kobayashi N, Ikeda K, Gu B, Takahashi S, Masumoto H, Maekawa S. Giant Faraday Rotation in Metal-Fluoride Nanogranular Films. Sci Rep 2018; 8:4978. [PMID: 29563580 PMCID: PMC5862954 DOI: 10.1038/s41598-018-23128-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 03/05/2018] [Indexed: 11/15/2022] Open
Abstract
Magneto-optical Faraday effect is widely applied in optical devices and is indispensable for optical communications and advanced information technology. However, the bismuth garnet Bi-YIG is only the Faraday material since 1972. Here we introduce (Fe, FeCo)-(Al-,Y-fluoride) nanogranular films exhibiting giant Faraday effect, 40 times larger than Bi-YIG. These films have a nanocomposite structure, in which nanometer-sized Fe, FeCo ferromagnetic granules are dispersed in a Al,Y-fluoride matrix.
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Affiliation(s)
- N Kobayashi
- Research Institute for Electromagnetic Materials, Tomiya, 981-3341, Japan.
| | - K Ikeda
- Research Institute for Electromagnetic Materials, Tomiya, 981-3341, Japan
| | - Bo Gu
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, 319-1195, Japan
| | - S Takahashi
- Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - H Masumoto
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, 980-8578, Japan
| | - S Maekawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, 319-1195, Japan
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Park TE, Park YH, Lee JM, Kim SW, Park HG, Min BC, Kim HJ, Koo HC, Choi HJ, Han SH, Johnson M, Chang J. Large spin accumulation and crystallographic dependence of spin transport in single crystal gallium nitride nanowires. Nat Commun 2017; 8:15722. [PMID: 28569767 PMCID: PMC5461503 DOI: 10.1038/ncomms15722] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 04/24/2017] [Indexed: 11/09/2022] Open
Abstract
Semiconductor spintronics is an alternative to conventional electronics that offers devices with high performance, low power and multiple functionality. Although a large number of devices with mesoscopic dimensions have been successfully demonstrated at low temperatures for decades, room-temperature operation still needs to go further. Here we study spin injection in single-crystal gallium nitride nanowires and report robust spin accumulation at room temperature with enhanced spin injection polarization of 9%. A large Overhauser coupling between the electron spin accumulation and the lattice nuclei is observed. Finally, our single-crystal gallium nitride samples have a trigonal cross-section defined by the (001), () and () planes. Using the Hanle effect, we show that the spin accumulation is significantly different for injection across the (001) and () (or ()) planes. This provides a technique for increasing room temperature spin injection in mesoscopic systems.
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Affiliation(s)
- Tae-Eon Park
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea
| | - Youn Ho Park
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea.,Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Jong-Min Lee
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea
| | - Sung Wook Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Hee Gyum Park
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea.,Department of Nanomaterials Science and Engineering, Korea University of Science and Technology, Daejeon 34113, Korea
| | - Byoung-Chul Min
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea.,Department of Nanomaterials Science and Engineering, Korea University of Science and Technology, Daejeon 34113, Korea
| | - Hyung-Jun Kim
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea
| | - Hyun Cheol Koo
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea.,KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Heon-Jin Choi
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Suk Hee Han
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea
| | - Mark Johnson
- Naval Research Laboratory, Washington, District Of Columbia 20375, USA
| | - Joonyeon Chang
- Center for Spintronics, Post-Si Semiconductor Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea.,Department of Nanomaterials Science and Engineering, Korea University of Science and Technology, Daejeon 34113, Korea
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18
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Pure circular polarization electroluminescence at room temperature with spin-polarized light-emitting diodes. Proc Natl Acad Sci U S A 2017; 114:1783-1788. [PMID: 28174272 DOI: 10.1073/pnas.1609839114] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We report the room-temperature electroluminescence (EL) with nearly pure circular polarization (CP) from GaAs-based spin-polarized light-emitting diodes (spin-LEDs). External magnetic fields are not used during device operation. There are two small schemes in the tested spin-LEDs: first, the stripe-laser-like structure that helps intensify the EL light at the cleaved side walls below the spin injector Fe slab, and second, the crystalline AlO x spin-tunnel barrier that ensures electrically stable device operation. The purity of CP is depressively low in the low current density (J) region, whereas it increases steeply and reaches close to the pure CP when J > 100 A/cm2 There, either right- or left-handed CP component is significantly suppressed depending on the direction of magnetization of the spin injector. Spin-dependent reabsorption, spin-induced birefringence, and optical spin-axis conversion are suggested to account for the observed experimental results.
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19
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Liao WC, Liao SW, Chen KJ, Hsiao YH, Chang SW, Kuo HC, Shih MH. Optimized Spiral Metal-Gallium-Nitride Nanowire Cavity for Ultra-High Circular Dichroism Ultraviolet Lasing at Room Temperature. Sci Rep 2016; 6:26578. [PMID: 27220650 PMCID: PMC4879524 DOI: 10.1038/srep26578] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 05/04/2016] [Indexed: 11/09/2022] Open
Abstract
Circularly polarized laser sources with small footprints and high efficiencies can possess advanced functionalities in optical communication and biophotonic integrated systems. However, the conventional lasers with additional circular-polarization converters are bulky and hardly compatible with nanophotonic circuits, and most active chiral plasmonic nanostructures nowadays exhibit broadband emission and low circular dichroism. In this work, with spirals of gallium nitride (GaN) nanowires (NWRs) covered by a metal layer, we demonstrated an ultrasmall semiconductor laser capable of emitting circularly-polarized photons. The left- and right-hand spiral metal nanowire cavities with varied periods were designed at ultraviolet wavelengths to achieve the high quality factor circular dichroism metastructures. The dissymmetry factors characterizing the degrees of circular polarizations of the left- and right-hand chiral lasers were 1.4 and −1.6 (±2 if perfectly circular polarized), respectively. The results show that the chiral cavities with only 5 spiral periods can achieve lasing signals with the high degrees of circular polarizations.
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Affiliation(s)
- Wei-Chun Liao
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University (NCTU), Hsinchu 30010, Taiwan
| | - Shu-Wei Liao
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University (NCTU), Hsinchu 30010, Taiwan
| | - Kuo-Ju Chen
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University (NCTU), Hsinchu 30010, Taiwan
| | - Yu-Hao Hsiao
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University (NCTU), Hsinchu 30010, Taiwan
| | - Shu-Wei Chang
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University (NCTU), Hsinchu 30010, Taiwan.,Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan
| | - Hao-Chung Kuo
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University (NCTU), Hsinchu 30010, Taiwan
| | - Min-Hsiung Shih
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University (NCTU), Hsinchu 30010, Taiwan.,Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan.,Department of Photonics, National Sun Yat-sen University (NSYSU), Kaohsiung 80424, Taiwan
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Žutić I, Faria Junior PE. Semiconductor lasers: taken for a spin. NATURE NANOTECHNOLOGY 2014; 9:750-752. [PMID: 25286270 DOI: 10.1038/nnano.2014.228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
- Igor Žutić
- Department of Physics, University at Buffalo, State University of New York, New York 14260, USA
| | - Paulo E Faria Junior
- 1] Department of Physics, University at Buffalo, State University of New York, New York 14260, USA [2] Instituto de Física de São Carlos, Universidade de São Paulo, 13566-590 São Carlos, São Paulo, Brazil
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