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Nguyen HA, Hammel BF, Sharp D, Kline J, Schwartz G, Harvey S, Nishiwaki E, Sandeno SF, Ginger DS, Majumdar A, Yazdi S, Dukovic G, Cossairt BM. Colossal Core/Shell CdSe/CdS Quantum Dot Emitters. ACS NANO 2024. [PMID: 39058675 DOI: 10.1021/acsnano.4c06961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
Single-photon sources are essential for advancing quantum technologies with scalable integration being a crucial requirement. To date, deterministic positioning of single-photon sources in large-scale photonic structures remains a challenge. In this context, colloidal quantum dots (QDs), particularly core/shell configurations, are attractive due to their solution processability. However, traditional QDs are typically small, about 3 to 6 nm, which restricts their deterministic placement and utility in large-scale photonic devices, particularly within optical cavities. The largest existing core/shell QDs are a family of giant CdSe/CdS QDs, with total diameters ranging from about 20 to 50 nm. Pushing beyond this size limit, we introduce a synthesis strategy for colossal CdSe/CdS QDs, with sizes ranging from 30 to 100 nm, using a stepwise high-temperature continuous injection method. Electron microscopy reveals a consistent hexagonal diamond morphology composed of 12 semipolar {101̅1} facets and one polar (0001) facet. We also identify conditions where shell growth is disrupted, leading to defects, islands, and mechanical instability, which suggest synthetic requirements for growing crystalline particles beyond 100 nm. The stepwise growth of thick CdS shells on CdSe cores enables the synthesis of emissive QDs with long photoluminescence lifetimes of a few microseconds and suppressed blinking at room temperature. Notably, QDs with 80 and 100 CdS monolayers exhibit high single-photon emission purity with second-order photon correlation g(2)(0) values below 0.2.
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Affiliation(s)
- Hao A Nguyen
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Benjamin F Hammel
- Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - David Sharp
- Department of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Jessica Kline
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Griffin Schwartz
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Samantha Harvey
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Emily Nishiwaki
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Soren F Sandeno
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - David S Ginger
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Arka Majumdar
- Department of Physics, University of Washington, Seattle, Washington 98195, United States
- Department of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Sadegh Yazdi
- Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309-0215, United States
- Renewable and Sustainable Energy Institute, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - Gordana Dukovic
- Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309-0215, United States
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
- Renewable and Sustainable Energy Institute, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - Brandi M Cossairt
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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Son Bui HX, Thi Doan T, Tri Luong NH, Khue Luu D, Thu Do HT, Ha Chu L, Pham D, Kim Vu OT, Tung Bui S, Tran Nguyen T, Khuyen Bui X, Lam Vu D, Son Nguyen H, Son Ha T, Le-Van Q. Spatial photoluminescence and lifetime mappings of quasi-2D perovskites coupled with a dielectric metasurface. OPTICS LETTERS 2024; 49:2465-2468. [PMID: 38691745 DOI: 10.1364/ol.517100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 04/01/2024] [Indexed: 05/03/2024]
Abstract
Light-matter interaction between quantum emitters and optical cavities plays a vital role in fundamental quantum photonics and the development of optoelectronics. Resonant metasurfaces are proven to be an efficient platform for tailoring the spontaneous emission (SE) of the emitters. In this work, we study the interplay between quasi-2D perovskites and dielectric TiO2 metasurfaces. The metasurface, functioning as an open cavity, enhances electric fields near its plane, thereby influencing the emissions of the perovskite. This is verified through angle-resolved photoluminescence (PL) studies. We also conducted reflectivity measurements and numerical simulations to validate the coupling between the quasi-2D perovskites and photonic modes. Notably, our work introduces a spatial mapping approach to study Purcell enhancement. Using fluorescence lifetime imaging microscopy (FLIM), we directly link the PL and lifetimes of the quasi-2D perovskites in spatial distribution when positioned on the metasurface. This correlation provides unprecedented insights into emitter distribution and emitter-resonator interactions. The methodology opens a new (to the best of our knowledge) approach for studies in quantum optics, optoelectronics, and medical imaging by enabling spatial mapping of both PL intensity and lifetime, differentiating between uncoupled quantum emitters and those coupled with different types of resonators.
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Nguyen HA, Dixon G, Dou FY, Gallagher S, Gibbs S, Ladd DM, Marino E, Ondry JC, Shanahan JP, Vasileiadou ES, Barlow S, Gamelin DR, Ginger DS, Jonas DM, Kanatzidis MG, Marder SR, Morton D, Murray CB, Owen JS, Talapin DV, Toney MF, Cossairt BM. Design Rules for Obtaining Narrow Luminescence from Semiconductors Made in Solution. Chem Rev 2023. [PMID: 37311205 DOI: 10.1021/acs.chemrev.3c00097] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Solution-processed semiconductors are in demand for present and next-generation optoelectronic technologies ranging from displays to quantum light sources because of their scalability and ease of integration into devices with diverse form factors. One of the central requirements for semiconductors used in these applications is a narrow photoluminescence (PL) line width. Narrow emission line widths are needed to ensure both color and single-photon purity, raising the question of what design rules are needed to obtain narrow emission from semiconductors made in solution. In this review, we first examine the requirements for colloidal emitters for a variety of applications including light-emitting diodes, photodetectors, lasers, and quantum information science. Next, we will delve into the sources of spectral broadening, including "homogeneous" broadening from dynamical broadening mechanisms in single-particle spectra, heterogeneous broadening from static structural differences in ensemble spectra, and spectral diffusion. Then, we compare the current state of the art in terms of emission line width for a variety of colloidal materials including II-VI quantum dots (QDs) and nanoplatelets, III-V QDs, alloyed QDs, metal-halide perovskites including nanocrystals and 2D structures, doped nanocrystals, and, finally, as a point of comparison, organic molecules. We end with some conclusions and connections, including an outline of promising paths forward.
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Affiliation(s)
- Hao A Nguyen
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Grant Dixon
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Florence Y Dou
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Shaun Gallagher
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Stephen Gibbs
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Dylan M Ladd
- Department of Materials Science and Engineering, University of Colorado Boulder, Boulder, Colorado 80303, United States
| | - Emanuele Marino
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, Italy
| | - Justin C Ondry
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - James P Shanahan
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Eugenia S Vasileiadou
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Stephen Barlow
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States
| | - Daniel R Gamelin
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - David S Ginger
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - David M Jonas
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States
| | - Mercouri G Kanatzidis
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Seth R Marder
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303, United States
| | - Daniel Morton
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States
| | - Christopher B Murray
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jonathan S Owen
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Dmitri V Talapin
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Michael F Toney
- Department of Materials Science and Engineering, University of Colorado Boulder, Boulder, Colorado 80303, United States
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303, United States
| | - Brandi M Cossairt
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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4
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Fang W, Lin B, Li GX, Yang Y. Selective mode excitations and spontaneous emission engineering in quantum emitter-photonic structure coupled systems. OPTICS EXPRESS 2022; 30:21103-21124. [PMID: 36224839 DOI: 10.1364/oe.455346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/23/2022] [Indexed: 06/16/2023]
Abstract
We study the excitation conditions of the supported field modes, as well as the spontaneous decay property of a two-level quantum emitter coupled to photonic structures containing topological insulators (TIs) and left-handed materials. Within the proper field quantization scheme, the spontaneous decay rates of dipoles with different polarizations are expressed in forms of the Green's functions. We find that in the proposed structure, the variation in the topological magnetoelectric polarizability (TMP) has a deterministic effect on the excitation of different field modes. As the result, the spontaneous decay property of the quantum emitter can be engineered. For a dipole placed in different spatial regions, the spontaneous decay feature indicates a dominant contribution from the waveguide modes, the surface plasmon modes or the free vacuum modes. Moreover, a special kind of the surface plasmon modes displaying asymmetric density of states at the interfaces, becomes legal in the presence of nontrivial TIs. These phenomena manifest the feasibility in controlling dipole emissions via manipulations of the topological magnetoelectric (TME) effect. Our results have potential applications in quantum technologies relied on the accurate control over light-matter interactions.
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5
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Wellnitz D, Pupillo G, Schachenmayer J. A quantum optics approach to photoinduced electron transfer in cavities. J Chem Phys 2021; 154:054104. [DOI: 10.1063/5.0037412] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- D. Wellnitz
- ISIS (UMR 7006), University of Strasbourg and CNRS, and icFRC, 67000 Strasbourg, France
- IPCMS (UMR 7504), CNRS, 67000 Strasbourg, France
| | - G. Pupillo
- ISIS (UMR 7006), University of Strasbourg and CNRS, and icFRC, 67000 Strasbourg, France
| | - J. Schachenmayer
- ISIS (UMR 7006), University of Strasbourg and CNRS, and icFRC, 67000 Strasbourg, France
- IPCMS (UMR 7504), CNRS, 67000 Strasbourg, France
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6
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Mandal A, Krauss TD, Huo P. Polariton-Mediated Electron Transfer via Cavity Quantum Electrodynamics. J Phys Chem B 2020; 124:6321-6340. [PMID: 32589846 DOI: 10.1021/acs.jpcb.0c03227] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigate the polariton-mediated electron transfer reaction in a model system with analytic rate constant theory and direct quantum dynamical simulations. We demonstrate that the photoinduced charge transfer reaction between a bright donor state and dark acceptor state can be significantly enhanced or suppressed by coupling the molecular system to the quantized radiation field inside an optical cavity. This is because the quantum light-matter interaction can influence the effective driving force and electronic couplings between the donor state, which is the hybrid light-matter excitation, and the molecular acceptor state. Under the resonance condition between the photonic and electronic excitations, the effective driving force can be tuned by changing the light-matter coupling strength; for an off-resonant condition, the same effect can be accomplished by changing the molecule-cavity detuning. We further demonstrate that using both the electronic coupling and light-matter coupling helps to extend the effective couplings across the entire system, even for the dark state that carries a zero transition dipole. Theoretically, we find that both the counter-rotating terms and the dipole self-energy in the quantum electrodynamics Hamiltonian are important for obtaining an accurate polariton eigenspectrum as well as the polariton-mediated charge transfer rate constant, especially in the ultrastrong coupling regime.
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Affiliation(s)
- Arkajit Mandal
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, New York 14627, United States
| | - Todd D Krauss
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, New York 14627, United States
| | - Pengfei Huo
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, New York 14627, United States
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7
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Fröch JE, Kim S, Stewart C, Xu X, Du Z, Lockrey M, Toth M, Aharonovich I. Photonic Nanobeam Cavities with Nanopockets for Efficient Integration of Fluorescent Nanoparticles. NANO LETTERS 2020; 20:2784-2790. [PMID: 32097017 DOI: 10.1021/acs.nanolett.0c00466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Integrating fluorescent nanoparticles with high-Q, small mode volume cavities is indispensable for nanophotonics and quantum technologies. To date, nanoparticles have largely been coupled to evanescent fields of cavity modes, which limits the strength of the interaction. Here, we developed both a cavity design and a fabrication method that enable efficient coupling between a fluorescent nanoparticle and a cavity optical mode. The design consists of a fishbone-shaped, one-dimensional photonic crystal cavity with a nanopocket located at the electric field maximum of the fundamental optical mode. Furthermore, the presence of a nanoparticle inside the pocket reduces the mode volume substantially and induces subwavelength light confinement. Our approach opens exciting pathways to achieve tight light confinement around fluorescent nanoparticles for applications in energy, sensing, lasing, and quantum technologies.
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8
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Chen Y, Ryou A, Friedfeld MR, Fryett T, Whitehead J, Cossairt BM, Majumdar A. Deterministic Positioning of Colloidal Quantum Dots on Silicon Nitride Nanobeam Cavities. NANO LETTERS 2018; 18:6404-6410. [PMID: 30251868 DOI: 10.1021/acs.nanolett.8b02764] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Engineering an array of precisely located cavity-coupled active media poses a major experimental challenge in the field of hybrid integrated photonics. We deterministically position solution-processed colloidal quantum dots (QDs) on high quality (Q)-factor silicon nitride nanobeam cavities and demonstrate light-matter coupling. By lithographically defining a window on top of an encapsulated cavity that is cladded in a polymer resist, and spin coating the QD solution, we can precisely control the placement of the QDs, which subsequently couple to the cavity. We show rudimentary control of the number of QDs coupled to the cavity by modifying the size of the window. Furthermore, we demonstrate Purcell enhancement and saturable photoluminescence in this QD-cavity platform. Finally, we deterministically position QDs on a photonic molecule and observe QD-coupled cavity supermodes. Our results pave the way for precisely controlling the number of QDs coupled to a cavity by engineering the window size, the QD dimension, and the solution chemistry and will allow advanced studies in cavity enhanced single photon emission, ultralow power nonlinear optics, and quantum many-body simulations with interacting photons.
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Affiliation(s)
- Yueyang Chen
- Electrical Engineering , University of Washington , Seattle , Washington 98189 , United States
| | - Albert Ryou
- Electrical Engineering , University of Washington , Seattle , Washington 98189 , United States
| | - Max R Friedfeld
- Department of Chemistry , University of Washington , Seattle , Washington 98189 , United States
| | - Taylor Fryett
- Electrical Engineering , University of Washington , Seattle , Washington 98189 , United States
| | - James Whitehead
- Electrical Engineering , University of Washington , Seattle , Washington 98189 , United States
| | - Brandi M Cossairt
- Department of Chemistry , University of Washington , Seattle , Washington 98189 , United States
| | - Arka Majumdar
- Electrical Engineering , University of Washington , Seattle , Washington 98189 , United States
- Department of Physics , University of Washington , Seattle , Washington 98189 , United States
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9
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Khosla M, Rao S, Gupta S. Polarons Explain Luminescence Behavior of Colloidal Quantum Dots at Low Temperature. Sci Rep 2018; 8:8385. [PMID: 29849075 PMCID: PMC5976793 DOI: 10.1038/s41598-018-26678-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 05/11/2018] [Indexed: 02/03/2023] Open
Abstract
Luminescence properties of colloidal quantum dots have found applications in imaging, displays, light-emitting diodes and lasers, and single photon sources. Despite wide interest, several experimental observations in low-temperature photoluminescence of these quantum dots, such as the short lifetime on the scale of microseconds and a zero-longitudinal optical phonon line in spectrum, both attributed to a dark exciton in literature, remain unexplained by existing models. Here we propose a theoretical model including the effect of solid-state environment on luminescence. The model captures both coherent and incoherent interactions of band-edge exciton with phonon modes. Our model predicts formation of dressed states by coupling of the exciton with a confined acoustic phonon mode, and explains the short lifetime and the presence of the zero-longitudinal optical phonon line in the spectrum. Accounting for the interaction of the exciton with bulk phonon modes, the model also explains the experimentally observed temperature-dependence of the photoluminescence decay dynamics and temperature-dependence of the photoluminescence spectrum.
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Affiliation(s)
- Meenakshi Khosla
- Department of Electrical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India.,Department of Electrical and Computer Engineering, Cornell University, Ithaca, NY, 14850, USA
| | - Sravya Rao
- Department of Electrical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India
| | - Shilpi Gupta
- Department of Electrical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India.
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10
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A room temperature continuous-wave nanolaser using colloidal quantum wells. Nat Commun 2017; 8:143. [PMID: 28747633 PMCID: PMC5529567 DOI: 10.1038/s41467-017-00198-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 06/07/2017] [Indexed: 11/24/2022] Open
Abstract
Colloidal semiconductor nanocrystals have emerged as promising active materials for solution-processable optoelectronic and light-emitting devices. In particular, the development of nanocrystal lasers is currently experiencing rapid progress. However, these lasers require large pump powers, and realizing an efficient low-power nanocrystal laser has remained a difficult challenge. Here, we demonstrate a nanolaser using colloidal nanocrystals that exhibits a threshold input power of less than 1 μW, a very low threshold for any laser using colloidal emitters. We use CdSe/CdS core-shell nanoplatelets, which are efficient nanocrystal emitters with the electronic structure of quantum wells, coupled to a photonic-crystal nanobeam cavity that attains high coupling efficiencies. The device achieves stable continuous-wave lasing at room temperature, which is essential for many photonic and optoelectronic applications. Our results show that colloidal nanocrystals are suitable for compact and efficient optoelectronic devices based on versatile and inexpensive solution-processable materials. Colloidal nanocrystals are a promising material for easy-to-fabricate nanolasers, but suffer from high threshold powers. Here, the authors combine colloidal quantum wells with a photonic-crystal cavity into a stable, continuous-wave room-temperature nanolaser with a threshold below one microwatt
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11
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Chang H, Min K, Lee M, Kang M, Park Y, Cho KS, Roh YG, Hwang SW, Jeon H. Colloidal quantum dot lasers built on a passive two-dimensional photonic crystal backbone. NANOSCALE 2016; 8:6571-6576. [PMID: 26935411 DOI: 10.1039/c5nr08544f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report the room-temperature lasing action from two-dimensional photonic crystal (PC) structures composed of a passive Si3N4 backbone with an over-coat of CdSe/CdS/ZnS colloidal quantum dots (CQDs) for optical gain. When optically excited, devices lased in dual PC band-edge modes, with the modal dominance governed by the thickness of the CQD over-layer. The demonstrated laser platform should have an impact on future photonic integrated circuits as the on-chip coupling between active and passive components is readily achievable.
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Affiliation(s)
- Hojun Chang
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyungtaek Min
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Myungjae Lee
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Minsu Kang
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Yeonsang Park
- Samsung Advanced Institute of Technology, Suwon 11678, Republic of Korea
| | - Kyung-Sang Cho
- Samsung Advanced Institute of Technology, Suwon 11678, Republic of Korea
| | - Young-Geun Roh
- Samsung Advanced Institute of Technology, Suwon 11678, Republic of Korea
| | - Sung Woo Hwang
- Samsung Advanced Institute of Technology, Suwon 11678, Republic of Korea
| | - Heonsu Jeon
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea and Department of Biophysics and Chemical Biology, Seoul National University, Seoul 08826, Republic of Korea
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12
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Xie W, Zhu Y, Aubert T, Hens Z, Brainis E, Van Thourhout D. Fabrication and characterization of on-chip silicon nitride microdisk integrated with colloidal quantum dots. OPTICS EXPRESS 2016; 24:A114-A122. [PMID: 26832565 DOI: 10.1364/oe.24.00a114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We designed and fabricated free-standing, waveguide-coupled silicon nitride microdisks hybridly integrated with embedded colloidal quantum dots. An efficient coupling of quantum dot emission to resonant disk modes and eventually to the access waveguides is demonstrated. The amount of light coupled out to the access waveguide can be tuned by controlling its dimensions and offset with the disk edge. These devices open up new opportunities for both on-chip silicon nitride integrated photonics and novel optoelectronic devices with quantum dots.
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13
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Penterman SJ, Liddell Watson CM. Anisometric C60fullerene colloids assisted by structure-directing agent. CrystEngComm 2016. [DOI: 10.1039/c5ce02122g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Xie W, Gomes R, Aubert T, Bisschop S, Zhu Y, Hens Z, Brainis E, Van Thourhout D. Nanoscale and Single-Dot Patterning of Colloidal Quantum Dots. NANO LETTERS 2015; 15:7481-7487. [PMID: 26455513 DOI: 10.1021/acs.nanolett.5b03068] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Using an optimized lift-off process we develop a technique for both nanoscale and single-dot patterning of colloidal quantum dot films, demonstrating feature sizes down to ~30 nm for uniform films and a yield of 40% for single-dot positioning, which is in good agreement with a newly developed theoretical model. While first of all presenting a unique tool for studying physics of single quantum dots, the process also provides a pathway toward practical quantum dot-based optoelectronic devices.
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Affiliation(s)
| | - Raquel Gomes
- Physics and Chemistry of Nanostructures, Ghent University , Krijgslaan 281-S3, 9000 Ghent, Belgium
| | - Tangi Aubert
- Physics and Chemistry of Nanostructures, Ghent University , Krijgslaan 281-S3, 9000 Ghent, Belgium
| | - Suzanne Bisschop
- Physics and Chemistry of Nanostructures, Ghent University , Krijgslaan 281-S3, 9000 Ghent, Belgium
| | | | - Zeger Hens
- Physics and Chemistry of Nanostructures, Ghent University , Krijgslaan 281-S3, 9000 Ghent, Belgium
| | - Edouard Brainis
- Physics and Chemistry of Nanostructures, Ghent University , Krijgslaan 281-S3, 9000 Ghent, Belgium
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15
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Calvo ME, Hidalgo N, Schierholz R, Kovács A, Fernández A, Bellino MG, Soler-Illia GJAA, Míguez H. Full solution processed mesostructured optical resonators integrating colloidal semiconductor quantum dots. NANOSCALE 2015; 7:16583-16589. [PMID: 26400500 DOI: 10.1039/c5nr03977k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Herein we show a solution based synthetic pathway to obtain a resonant optical cavity with embedded colloidal semiconductor quantum dots (CSQDs). The optical cavity pore network, surrounded by two dense Bragg mirrors, was designed ad hoc to selectively host the quantum dots, while uncontrolled infiltration of those in the rest of the layered structure was prevented. Coupling between the optical resonant modes of the host and the natural emission of the embedded nanoparticles gives rise to the fine tuning of the luminescence spectrum extracted from the ensemble. Our approach overcomes, without the need for an encapsulating agent and exclusively by solution processing, the difficulties that arise from the low thermal and chemical stability of the CSQDs. It opens the route to achieving precise control over their location and hence over the spectral properties of light emitted by these widely employed nanomaterials. Furthermore, as the porosity of the cavity is preserved after infiltration, the system remains responsive to environmental changes, which provides an added value to the proposed structure.
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Affiliation(s)
- Mauricio E Calvo
- Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas-Universidad de Sevilla, Américo Vespucio 49, 41092 Sevilla, Spain.
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16
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Xie W, Zhu Y, Aubert T, Verstuyft S, Hens Z, Van Thourhout D. Low-loss silicon nitride waveguide hybridly integrated with colloidal quantum dots. OPTICS EXPRESS 2015; 23:12152-12160. [PMID: 25969303 DOI: 10.1364/oe.23.012152] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Silicon nitride waveguides with a monolayer of colloidal quantum dots embedded inside were fabricated using a low-temperature deposition process and an optimized dry etching step for the composite layers. We experimentally demonstrated the luminescence of the embedded quantum dots is preserved and the loss of these hybrid waveguide wires is as low as 2.69dB/cm at 900nm wavelength. This hybrid integration of low loss silicon nitride photonics with active emitters offers opportunities for optical sources operating over a very broad wavelength range.
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Gupta S, Waks E. Overcoming Auger recombination in nanocrystal quantum dot laser using spontaneous emission enhancement. OPTICS EXPRESS 2014; 22:3013-3027. [PMID: 24663592 DOI: 10.1364/oe.22.003013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We propose a method to overcome Auger recombination in nanocrystal quantum dot lasers using cavity-enhanced spontaneous emission. We derive a numerical model for a laser composed of nanocrystal quantum dots coupled to optical nanocavities with small mode-volume. Using this model, we demonstrate that spontaneous emission enhancement of the biexciton transition lowers the lasing threshold by reducing the effect of Auger recombination. We analyze a photonic crystal nanobeam cavity laser as a realistic device structure that implements the proposed approach.
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