Enhanced terahertz modulation using a plasmonic perfect absorber based on black phosphorus

被引：8
作者：
Wang, Shuqi [1 ]
Li, Shuangluan [1 ]
Zhou, Yuanguo [1 ]
Huang, Jianping [2 ]
Ren, Qiang [3 ]
Zhuo, Jianming [4 ]
Cai, Yijun [2 ,5 ]
机构：
[1] Xian Univ Sci & Technol, Coll Commun & Informat Engn, Xian 710054, Peoples R China
[2] Xiamen Univ Technol, Fujian Prov Key Lab Optoelect Technol & Devices, Xiamen 361024, Peoples R China
[3] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China
[4] Xiamen Blue Ocean Technol Co Ltd, Xiamen 361022, Peoples R China
[5] Chinese Acad Sci, Key Lab Microelect Devices & Integrated Technol, Inst Microelect, Beijing 100029, Peoples R China
来源：
APPLIED OPTICS | 2020年 / 59卷 / 29期
基金：
中国国家自然科学基金;
关键词：
SURFACE-PLASMONS; ABSORPTION; LIGHT;
D O I：
10.1364/AO.402639
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, we design a plasmonic perfect absorber based on black phosphorus (BP) with enhanced terahertz modulation. By tuning the chemical potential (mu(c)) of BP, the modulation depth can reach up to 95%. The influence of geometric size and bandgap of BP on reflection spectra is also investigated. Moreover, the effect of the incident angle on the reflectance is discussed with different values of mu(c). Our results show that the plasmonic nanoslit mode contributes to the enhancement of the modulation effect. This simple periodical structure provides a potential route to design a tunable plasmonic BP-based modulator in the THz range. (C) 2020 Optical Society of America
引用
收藏
页码：9279 / 9283
页数：5
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