中国物理B ›› 2022, Vol. 31 ›› Issue (6): 64210-064210.doi: 10.1088/1674-1056/ac4f5b
Haotian Du(杜皓天)1, Mingzhu Jiang(江明珠)1,2, Lizhen Zeng(曾丽珍)1, Longhui Zhang(张隆辉)1, Weilin Xu(徐卫林)1, Xiaowen Zhang(张小文)1, and Fangrong Hu(胡放荣)1,†
Haotian Du(杜皓天)1, Mingzhu Jiang(江明珠)1,2, Lizhen Zeng(曾丽珍)1, Longhui Zhang(张隆辉)1, Weilin Xu(徐卫林)1, Xiaowen Zhang(张小文)1, and Fangrong Hu(胡放荣)1,†
摘要: A switchable terahertz (THz) polarization converter based on vanadium dioxide (VO2) metamaterial is proposed. It is a 5-layer structure which containing metal split-ring-resonator (SRR), the first polyimide (PI) spacer, VO2 film, the second PI spacer, and metal grating. It is an array structure and the period in x and y directions is 100 μm. The performance is simulated by using finite integration technology. The simulation results show that, when the VO2 is in insulating state, the device is a transmission polarization converter. The cross-linear polarization conversion can be realized in a broadband of 0.70 THz, and the polarization conversion rate (PCR) is higher than 99%. Under thermal stimulus, the VO2 changes from insulating state to metallic state, and the device is a reflective polarization converter. The linear-to-circular polarization conversion can be successfully realized in a broadband of 0.50 THz, and the PCR is higher than 88%.
中图分类号: (Filters, zone plates, and polarizers)