Switchable terahertz absorber based on metamaterial structure with photosensitive semiconductor

被引：16

作者：

Yang, Lei ^{[1
,2
]}

Wang, Hao ^{[1
]}

Ren, Xudong ^{[1
,2
]}

Song, Xiaoxian ^{[1
]}

Chen, Mingyang ^{[1
]}

Tong, Yanqun ^{[1
]}

Ye, Yunxia ^{[1
,3
]}

Ren, Yunpeng ^{[1
,3
]}

Liu, Shenyi ^{[1
]}

Wang, Sibo ^{[1
]}

Yin, Liang ^{[1
]}

Yao, Jianquan ^{[1
,3
,4
]}

机构：

[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Jiangsu Yudi Opt Co Ltd, Nantong 226404, Peoples R China

[3] Jiangsu Univ, Inst Micronano Optoelect & Terahertz Technol, Zhenjiang 212013, Jiangsu, Peoples R China

[4] Tianjin Univ, Coll Precis Instruments & Optoelect Engn, Tianjin 300072, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2021年 / 485卷

关键词：

Terahertz metamaterial absorber; Switchable absorption peak; Photosensitive semiconductor;

D O I：

10.1016/j.optcom.2020.126708

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A terahertz absorber based on metamaterial is designed. The tunability of the absorber can be realized by employing photosensitive semiconductor material of GaAs. By adjusting the conductivity of GaAs through photo-excitation, the absorption peak shifts from 2.73 THz to 3.85 THz with full width at half maximum (FWHM) relative to the resonance frequency 4.4% and 21.4% respectively. Qualitative analyses are carried out on the electromagnetic responding modes with different perspectives. Physical mechanisms of the metamaterial absorber are construed with the split-ring resonators model at 2.73 THz and the oscillating conduction model at 3.85 THz. This switchable terahertz absorber owns a great potential in the applications such as optical switch, optical detection, optical coding and others.

引用

页数：5