Surface plasmon-enhanced photodetection in MoTe2 phototransistors with Au nanoparticles

被引：13

作者：

Chen, Wenjie ^{[1
]}

Liang, Renrong ^{[1
]}

Liu, Yu ^{[1
]}

Zhang, Shuqin ^{[1
]}

Cheng, Weijun ^{[1
]}

Zhao, Linyuan ^{[1
]}

Xu, Jun ^{[1
]}

机构：

[1] Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol BNRis, Inst Microelect, Beijing 100084, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2019年 / 115卷 / 14期

基金：

中国国家自然科学基金;

关键词：

INFRARED PHOTODETECTION; LAYER MOS2; ELECTRONICS; TRANSITION; GRAPHENE;

D O I：

10.1063/1.5116644

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An effective method to improve the photoresponse of MoTe2 phototransistors by decorating with Au nanoparticles (Au NPs) is demonstrated. The Au NPs can concentrate a strong electromagnetic field around them by localized surface plasmon resonances. As a result, the light absorption of MoTe2 films could be enhanced significantly. After optimized design with Au NPs, a more than 200 times increase in the photocurrent is observed under illumination of both 365 and 405 nm light. Furthermore, the responsivities are changed from 0.61 to 398 A/W under 365 nm light illumination and from 0.43 to 220 A/W under 405 nm light illumination after decorating Au NPs onto the MoTe2 phototransistors. These findings offer an avenue for practical applications of high performance MoTe2 optoelectronic devices in the future.

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页数：4

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