光电子快报(英文版), 2016, 12 (6): 409, Published Online: Oct. 12, 2017
A novel terahertz device with multi-function of polarization and switch based on phase transition of VO2
Abstract
A terahertz (THz) polarizer and switch structure is proposed based on the phase transition of vanadium dioxide (VO2). When VO2is in the insulation phase, the resonance frequencies of the proposed structure are 1.49 THz and 1.22 THz for the x- and y-polarization, respectively. It can perform as a THz polarizer with extinction ratios of 52.5 dB and 17 dB for the y- and x-polarization, respectively;When VO2transforms into metallic phase, the resonance frequency for x-polarization wave shifts from 1.49 THz to 1.22 THz, while that remains still for the y-polarization component. It means that the structure can work as a polarization-dependent THz switch with a high extinction ratio of 32 dB.
GU Wen-hao, CHANG Sheng-jiang, FAN Fei. A novel terahertz device with multi-function of polarization and switch based on phase transition of VO2[J]. 光电子快报(英文版), 2016, 12(6): 409.