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JIANJUN LIU1,* , FAN DING1
A kind of temperature-controlled terahertz absorber based on metamaterial was proposed by using the phase transition characteristics of vanadium dioxide film in this paper. The transmission and temperature-controlled tunability characteristics of phase change metamaterials were investigated in the terahertz band. When the incident terahertz wave is in a horizontally polarized or vertically polarized, the transmittance spectrum of the absorber exhibits two independent transmission broadband around 1.2THz, which the center frequencies are 1.15THz and 1.37 THz respectively and the bandwidth is 0.2THz and 0.3 THz respectively. When the temperature changes from 40℃ to 80℃ the transmittance of the two broadbands is drop apparently, especially at the phase transition temperature of Vanadium dioxide (68℃). For the two polarization states of incident light, the modulation depths of the designed absorber are more than 65%, and achieve a good modulation effect.
Absorber, Phase, Bidirectional, Terahertz.
JIANJUN LIU, FAN DING, Orthogonal bidirectional modulation of terahertz absorber based on phase change principle, Optoelectronics and Advanced Materials - Rapid Communications, 14, 5-6, May-June 2020, pp.208-213 (2020).
Submitted at: Aug. 5, 2019
Accepted at: June 16, 2020
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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