Reconfigurable terahertz rainbow deflector

被引：11

作者：

Cai, Jiacheng ^{[1
]}

Chen, Benwen ^{[1
]}

Wu, Jingbo ^{[1
]}

Li, Yi-Hang ^{[2
]}

Xue, Qiang ^{[2
]}

Wang, Taofeng ^{[1
]}

Zhang, Caihong ^{[1
]}

Wen, Qiye ^{[2
]}

Jin, Biaobing ^{[1
]}

Chen, Jian ^{[1
]}

Wu, Peiheng ^{[1
]}

机构：

[1] Nanjing Univ, Res Inst Supercond Elect RISE, Sch Elect Sci & Engn, 163 Xianlin Ave, Nanjing 210023, Peoples R China

[2] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2021年 / 118卷 / 14期

关键词：

D O I：

10.1063/5.0049478

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Dynamic terahertz (THz) beam steering is a promising technique for numerous applications, including communication, high-resolution imaging, and radar. However, advances in this technology are considerably limited by inadequate broadband and active phase shifters at THz frequencies. In this paper, we developed a type of VO2-based device capable of broadband THz beam steering. The effect of the tunable Brewster angle of the VO2 thin film along with the insulator-to-metal transition process was verified. We demonstrated that the VO2 grating could realize a dispersive beam deflector in a broad frequency band. Furthermore, upon heating, the VO2 grating could switch between three states of mirror reflector, "rainbow" deflector, and metallic grating. We believe that the proposed reconfigurable and broadband THz beam deflector offers a powerful avenue for manipulating THz beams.

引用

页数：6

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