Concentrically elliptical coherent diffraction rings are observed when a collimated laser beam is reflected from a mica substrate with Cd3As2 nano-films grown on it. The diffraction pattern is found to be an interference effect of light reflected from the elastic deformation of the mica substrate. The deformation of the substrate is induced by the in-plane thermal expansion caused by the heat transfer from the Cd3As2 thin film, which acts as an efficient light absorber. This thermal–mechanical effect is different from various other mechanisms that can produce similar coherent diffraction patterns from a large variety of materials. Furthermore, we show that a quantitative analysis based on a simple optical interference of light beam reflected from the mechanically deformed substrate can interpret all main features of the observed diffraction pattern. The light induced thermal–mechanical effect provides an interesting novel approach to characterize the thermal and mechanical properties of elastic materials through their coherent interaction with light. Our findings may provide interesting opportunities for optical control of the mechanical properties of flexible materials and for in situ characterization of the deformation process.
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7 March 2021
Research Article|
March 03 2021
Coherent diffraction rings induced by thermal–mechanical effect of a flexible Dirac semimetallic composite structure
Special Collection:
Topological Materials and Devices
Wei Lu;
Wei Lu
a)
1
State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering, Tianjin University
, Tianjin 300072, People's Republic of China
2
International Center for Quantum Materials, School of Physics, Peking University
, Beijing 100871, People's Republic of China
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Xiaoming Song;
Xiaoming Song
1
State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering, Tianjin University
, Tianjin 300072, People's Republic of China
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Jiwei Ling;
Jiwei Ling
3
State Key Laboratory of Surface Physics and Department of Physics, Fudan University
, Shanghai 200438, People's Republic of China
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Zipu Fan;
Zipu Fan
2
International Center for Quantum Materials, School of Physics, Peking University
, Beijing 100871, People's Republic of China
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Junchao Ma;
Junchao Ma
2
International Center for Quantum Materials, School of Physics, Peking University
, Beijing 100871, People's Republic of China
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Xiao Zhuo;
Xiao Zhuo
2
International Center for Quantum Materials, School of Physics, Peking University
, Beijing 100871, People's Republic of China
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Jing Liu
;
Jing Liu
1
State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering, Tianjin University
, Tianjin 300072, People's Republic of China
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Xiaodong Hu;
Xiaodong Hu
1
State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering, Tianjin University
, Tianjin 300072, People's Republic of China
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Faxian Xiu;
Faxian Xiu
3
State Key Laboratory of Surface Physics and Department of Physics, Fudan University
, Shanghai 200438, People's Republic of China
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Dong Sun
Dong Sun
b)
2
International Center for Quantum Materials, School of Physics, Peking University
, Beijing 100871, People's Republic of China
4
Collaborative Innovation Center of Quantum Matter
, Beijing 100871, People's Republic of China
b)Author to whom correspondence should be addressed: [email protected]
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a)
Electronic mail: [email protected]
b)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the Special Topic on Topological Materials and Devices.
J. Appl. Phys. 129, 093102 (2021)
Article history
Received:
October 30 2020
Accepted:
February 01 2021
Citation
Wei Lu, Xiaoming Song, Jiwei Ling, Zipu Fan, Junchao Ma, Xiao Zhuo, Jing Liu, Xiaodong Hu, Faxian Xiu, Dong Sun; Coherent diffraction rings induced by thermal–mechanical effect of a flexible Dirac semimetallic composite structure. J. Appl. Phys. 7 March 2021; 129 (9): 093102. https://doi.org/10.1063/5.0035647
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