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Ma ZR, Huang XC, Li TJ, Wang HC, Liu GC, Wang ZS, Li B, Li WB, Zhu LF. First Observation of New Flat Line Fano Profile via an X-Ray Planar Cavity. PHYSICAL REVIEW LETTERS 2022; 129:213602. [PMID: 36461956 DOI: 10.1103/physrevlett.129.213602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/10/2021] [Accepted: 09/27/2022] [Indexed: 06/17/2023]
Abstract
A new Fano profile of a flat line is achieved experimentally by manipulating the relative amplitude of the continuum path, when q takes the pure imaginary number of -i in the x-ray regime. The underlying mechanism is that the interference term in the scattering will cancel the discrete term exactly. This new Fano profile renders only an observable continuum along with an invisible response to the discrete state of atomic resonance. The results suggest not only a different strategy to invisibility studies which provides a possible tool to identify weaker structures hidden by the strong white line, but also a new scenario to enrich the manipulations of two-path interference and nonlinear Fano resonance.
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Affiliation(s)
- Zi-Ru Ma
- Hefei National Research Center for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Xin-Chao Huang
- Hefei National Research Center for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Tian-Jun Li
- Hefei National Research Center for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Hong-Chang Wang
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom
| | - Gen-Chang Liu
- MOE Key Laboratory of Advanced Micro-Structured Materials, Institute of Precision Optical Engineering (IPOE), School of Physics science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Zhan-Shan Wang
- MOE Key Laboratory of Advanced Micro-Structured Materials, Institute of Precision Optical Engineering (IPOE), School of Physics science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Bo Li
- Hefei National Research Center for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Wen-Bin Li
- MOE Key Laboratory of Advanced Micro-Structured Materials, Institute of Precision Optical Engineering (IPOE), School of Physics science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Lin-Fan Zhu
- Hefei National Research Center for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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Wang Y, Liao L, Hu T, Luo S, Wu L, Wang J, Zhang Z, Xie W, Sun L, Kavokin AV, Shen X, Chen Z. Exciton-Polariton Fano Resonance Driven by Second Harmonic Generation. PHYSICAL REVIEW LETTERS 2017; 118:063602. [PMID: 28234528 DOI: 10.1103/physrevlett.118.063602] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Indexed: 06/06/2023]
Abstract
Angle-resolved second harmonic generation (SHG) spectra of ZnO microwires show characteristic Fano resonances in the spectral vicinity of exciton-polariton modes. We observe a resonant peak followed by a strong dip in SHG originating from the constructive and destructive interference of the nonresonant SHG and the resonant contribution of the polariton mode. It is demonstrated that the Fano line shape, and thus the Fano asymmetry parameter q, can be tuned by the phase shift of the two channels. We develop a model to calculate the phase-dependent q as a function of the radial angle in the microwire and achieve a good agreement with the experimental results. The deduced phase-to-q relation unveils the crucial information about the dynamics of the system and offers a tool for control on the line shape of the SHG spectra in the vicinity of exciton-polariton modes.
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Affiliation(s)
- Yafeng Wang
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Liming Liao
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Tao Hu
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Song Luo
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Lin Wu
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Jun Wang
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Zhe Zhang
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Wei Xie
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Liaoxin Sun
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - A V Kavokin
- University of Southampton, Highfield, Southampton SO249QH, United Kingdom
- SPIN-CNR, Viale del Politechnico 1, I-00133 Rome, Italy
- Spin Optics Laboratory, St-Petersburg State University, 1 Ulianovskaya, St-Petersburg, 198504, Russia
| | - Xuechu Shen
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
| | - Zhanghai Chen
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing Jiangsu 210093, China
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De Giovannini U, Hübener H, Rubio A. A First-Principles Time-Dependent Density Functional Theory Framework for Spin and Time-Resolved Angular-Resolved Photoelectron Spectroscopy in Periodic Systems. J Chem Theory Comput 2016; 13:265-273. [DOI: 10.1021/acs.jctc.6b00897] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Umberto De Giovannini
- Nano-Bio
Spectroscopy Group, University of the Basque Country UPV/EHU, Avenida
de Tolosa 72, 20018 San Sebastian, Spain
- Dipartimento
di Fisica e Chimica, Università degli Studi di Palermo, Via
Archirafi 36, I-90123 Palermo, Italy
| | - Hannes Hübener
- Nano-Bio
Spectroscopy Group, University of the Basque Country UPV/EHU, Avenida
de Tolosa 72, 20018 San Sebastian, Spain
| | - Angel Rubio
- Nano-Bio
Spectroscopy Group, University of the Basque Country UPV/EHU, Avenida
de Tolosa 72, 20018 San Sebastian, Spain
- Max Planck Institute
for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761 Hamburg, Germany
- Center
for Free-Electron Laser Science and Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
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