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Ruan B, Li M, Liu C, Gao E, Zhang Z, Chang X, Zhang B, Li H. Slow-light effects based on the tunable Fano resonance in a Tamm state coupled graphene surface plasmon system. Phys Chem Chem Phys 2023; 25:1685-1689. [PMID: 36541662 DOI: 10.1039/d2cp04531a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We theoretically realize the tunable Fano resonance in a hybrid structure that allows the coupling between Tamm plasmon-polaritons (TPPs) and graphene surface plasmon-polaritons (SPPs). In this coupling system, a distributed Bragg reflector (DBR)/Ag structure is designed to generate the TPP with a narrow resonance, and the graphene SPP is excited by grating coupling with a broad resonance. The overlap of these two kinds of resonances results in the Fano resonance with a high-quality factor close to 1500. The behaviors of the Fano resonance are discussed carefully, and the results show that both the graphene Fermi level and the incidence angle can actively tune the profile of the Fano resonance. Owing to the ultrasharp spectrum of the tunable Fano resonance, our design may offer an alternative strategy for developing various optoelectronic devices such as filters, sensors, and nonlinear and slow-light devices. Finally, as an example of the potential applications, we apply the tunable Fano resonance to the slow-light effect, a high performance slow-light effect can be achieved, and the group delay can reach up to 52 ps.
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Affiliation(s)
- Banxian Ruan
- School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Min Li
- School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Chao Liu
- School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Enduo Gao
- School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Zhenbin Zhang
- School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Xia Chang
- School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Baihui Zhang
- School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Hongjian Li
- School of Physics and Electronics, Central South University, Changsha 410083, China.
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Mi Q, Sang T, Pei Y, Yang C, Li S, Wang Y, Ma B. High-quality-factor dual-band Fano resonances induced by dual bound states in the continuum using a planar nanohole slab. NANOSCALE RESEARCH LETTERS 2021; 16:150. [PMID: 34585286 PMCID: PMC8479049 DOI: 10.1186/s11671-021-03607-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 09/21/2021] [Indexed: 05/05/2023]
Abstract
In photonics, it is essential to achieve high-quality (Q)-factor resonances to improve optical devices' performances. Herein, we demonstrate that high-Q-factor dual-band Fano resonances can be achieved by using a planar nanohole slab (PNS) based on the excitation of dual bound states in the continuum (BICs). By shrinking or expanding the tetramerized holes of the superlattice of the PNS, two symmetry-protected BICs can be induced to dual-band Fano resonances and their locations as well as their Q-factors can be flexibly tuned. Physical mechanisms for the dual-band Fano resonances can be interpreted as the resonant couplings between the electric toroidal dipoles or the magnetic toroidal dipoles based on the far-field multiple decompositions and the near-field distributions of the superlattice. The dual-band Fano resonances of the PNS possess polarization-independent feature, and they can be survived even when the geometric parameters of the PNS are significantly altered, making them more suitable for potential applications.
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Affiliation(s)
- Qing Mi
- Department of Photoelectric Information Science and Engineering, School of Science, Jiangnan University, Wuxi, 214122, China
| | - Tian Sang
- Department of Photoelectric Information Science and Engineering, School of Science, Jiangnan University, Wuxi, 214122, China.
| | - Yao Pei
- Department of Photoelectric Information Science and Engineering, School of Science, Jiangnan University, Wuxi, 214122, China
| | - Chaoyu Yang
- Department of Photoelectric Information Science and Engineering, School of Science, Jiangnan University, Wuxi, 214122, China
| | - Shi Li
- Department of Photoelectric Information Science and Engineering, School of Science, Jiangnan University, Wuxi, 214122, China
| | - Yueke Wang
- Department of Photoelectric Information Science and Engineering, School of Science, Jiangnan University, Wuxi, 214122, China
| | - Bin Ma
- Key Laboratory of Advanced Micro-Structured Materials MOE, Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China
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Liu M, Yu L, Lei Y, Fang X, Ma Y, Liu L, Zheng J, Lin K, Gao P. Numerical Investigation of Multifunctional Plasmonic Micro-Fiber Based on Fano Resonances and LSPR Excited via Cylindrical Vector Beam. SENSORS 2021; 21:s21165642. [PMID: 34451083 PMCID: PMC8402329 DOI: 10.3390/s21165642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/13/2021] [Accepted: 08/18/2021] [Indexed: 12/23/2022]
Abstract
Function expansion of fiber sensor is highly desired for ultrasensitive optical detection and analysis. Here, we present an approach of multifunctional fiber sensor based on Fano resonances and localized surface plasmon resonance (LSPR) excited via cylindrical vector beam with ability of refractive index (RI) sensing, nano-distance detection, and surface enhanced Raman spectroscopy (SERS). Silver (Ag)-nanocube modified microfiber is theoretically proved to enable to detect RI of the nearby solids and gases based on Fano resonances with a sensitivity of 128.63 nm/refractive index unit (RIU) and 148.21 nm/RIU for solids and gases, respectively. The scattering spectrum of the Ag nanocube has the red-shift response to the varies of the nano-distance between the nanocube and the nearby solid, providing a detection sensitivity up to 1.48 nm (wavelength)/nm (distance). Moreover, this configuration is theoretically verified to have ability to significantly enhance electric field intensity. Radially polarized beam is proved to enhance the electric field intensity as large as 5 times in the side-face configuration compared with linear polarization beam. This fiber-based sensing method is helpful in fields of remote detection, multiple species detection, and cylindrical vector beam-based detection.
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Affiliation(s)
- Min Liu
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
- Guangzhou Institute of Technology, Xidian University, Guangzhou 510555, China
| | - Lan Yu
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Yunze Lei
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Xiang Fang
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Ying Ma
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Lixin Liu
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Juanjuan Zheng
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Ke Lin
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Peng Gao
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
- Correspondence:
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Zhang YN, Zhou T, Han B, Zhang A, Zhao Y. Optical bio-chemical sensors based on whispering gallery mode resonators. NANOSCALE 2018; 10:13832-13856. [PMID: 30020301 DOI: 10.1039/c8nr03709d] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Whispering gallery mode (WGM) resonators have attracted extensive attention and their unique characteristics have led to some remarkable achievements. In particular, when combined with optical sensing technology, the WGM reonator-based sensor offers the advantages of small size, high sensitivity and a real-time dynamic response. At present, this type of sensor is widely applied in the bio-chemical sensing field. In this paper, we briefly review the sensing principle, the structures and the sensing applications of optical bio-chemical sensors based on the WGM resonator, with particular focuses on their sensing properties and their advantages and disadvantages. In addition, the existing problems and future development trends of WGM resonator-based optical bio-chemical sensors are discussed.
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Affiliation(s)
- Ya-Nan Zhang
- College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China. and State Key Laboratory of Synthetical Automation for Process Industries, Shenyang, 110819, China
| | - Tianmin Zhou
- College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Bo Han
- College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China. and Liaoning Provincial Institute of Measurement, Shenyang 110819, China
| | - Aozhuo Zhang
- College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China.
| | - Yong Zhao
- College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China. and State Key Laboratory of Synthetical Automation for Process Industries, Shenyang, 110819, China
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Shao L, Liu Z, Hu J, Gunawardena D, Tam HY. Optofluidics in Microstructured Optical Fibers. MICROMACHINES 2018; 9:mi9040145. [PMID: 30424079 PMCID: PMC6187474 DOI: 10.3390/mi9040145] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/10/2018] [Accepted: 03/21/2018] [Indexed: 12/31/2022]
Abstract
In this paper, we review the development and applications of optofluidics investigated based on the platform of microstructured optical fibers (MOFs) that have miniature air channels along the light propagating direction. The flexibility of the customizable air channels of MOFs provides enough space to implement light-matter interaction, as fluids and light can be guided simultaneously along a single strand of fiber. Different techniques employed to achieve the fluidic inlet/outlet as well as different applications for biochemical analysis are presented. This kind of miniature platform based on MOFs is easy to fabricate, free of lithography, and only needs a tiny volume of the sample. Compared to optofluidics on the chip, no additional waveguide is necessary to guide the light since the core is already designed in MOFs. The measurements of flow rate, refractive index of the filled fluids, and chemical reactions can be carried out based on this platform. Furthermore, it can also demonstrate some physical phenomena. Such devices show good potential and prospects for applications in bio-detection as well as material analysis.
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Affiliation(s)
- Liyang Shao
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (L.S.); (J.H.)
| | - Zhengyong Liu
- Photonics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong; (D.G.); (H.-Y.T.)
- Correspondence:
| | - Jie Hu
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China; (L.S.); (J.H.)
| | - Dinusha Gunawardena
- Photonics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong; (D.G.); (H.-Y.T.)
| | - Hwa-Yaw Tam
- Photonics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong; (D.G.); (H.-Y.T.)
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