Double-wavelength coherent perfect absorption laser in Thue-Morse PT-symmetric photonic crystals

Dong Zhao; Guopeng Zhou; Yang Wang; Fanghua Liu; Haihong Xu; Hao Ni

Results in Physics (Aug 2022)

Double-wavelength coherent perfect absorption laser in Thue-Morse PT-symmetric photonic crystals

Dong Zhao,
Guopeng Zhou,
Yang Wang,
Fanghua Liu,
Haihong Xu,
Hao Ni

Affiliations

Dong Zhao: School of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, China; Optical Electromechanical and Intelligent Manufacturing Laboratory, Hubei University of Science and Technology, Xianning 437100, China
Guopeng Zhou: Engineering Technology Institute, Hubei University of Science and Technology, Xianning 437100, China
Yang Wang: School of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, China; Optical Electromechanical and Intelligent Manufacturing Laboratory, Hubei University of Science and Technology, Xianning 437100, China
Fanghua Liu: School of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, China; Optical Electromechanical and Intelligent Manufacturing Laboratory, Hubei University of Science and Technology, Xianning 437100, China
Haihong Xu: Information Center, Hubei University of Science and Technology, Xianning 437100, China
Hao Ni: School of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, China; Optical Electromechanical and Intelligent Manufacturing Laboratory, Hubei University of Science and Technology, Xianning 437100, China; Corresponding author at: School of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, China.

Journal volume & issue: Vol. 39
p. 105746

Abstract

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Coherent perfect absorption laser points (CPA-LPs) are investigated in the Thue-Morse (Th-M) PT-symmetric photonic crystals. CPA-LPs are induced as incident light impinges perpendicularly upon the structure. The operating wavelengths of the CPA-LPs are dependent on the Th-M sequence number, the incident angle and the gain-loss factor of materials. Especially, two CPA-LPs may be achieved with the same value of incident angle for a specific gain-loss factor. Double-wavelength laser consequently is supported in this structure and the corresponding transmittance of the CPA-LPs is optional. An abrupt jump in the calculated reflection coefficient phase could be found at the CPA-LPs as well. This study may be helpful in potential applications for lasers and highly sensitive sensors.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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