Regular Article - Optical Phenomena and Photonics
Tunable enhanced THz absorption in Fibonacci photonic crystals with graphene
Department of Physics, Nanchang University, 330031, Nanchang, People’s Republic of China
2 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 430070, Wuhan, People’s Republic of China
3 State Key Laboratory of Millimeter Waves, Southeast University, 210096, Nanjing, People’s Republic of China
Accepted: 26 August 2022
Published online: 16 September 2022
We investigate the THz absorption properties of Fibonacci photonic crystals with graphene by using characteristics matrix method based on conductivity. We demonstrate that the structure can lead to perfect THz absorption because of strong photon localization in the defect layer of Fibonacci photonic crystals with graphene. By adjusting the incident angle, chemical potential, relaxation rate or the period number of Fibonacci photonic crystals, the maximum THz absorptivity can be tailored, and the absorptivity may be tuned continuously from 0 to 100%. The position of the THz absorption peaks can be tuned by changing the center wavelength or the thicknesses of structure layers. Moreover, the position of the THz absorption peaks can be tuned by changing the center wavelength or the thicknesses of structure layers. The proposed structure is easy to implement and has potential application in optoelectronic devices.
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