Light trapping and surface plasmon enhanced high-performance NIR photodetector

被引：173

作者：

Luo, Lin-Bao ^{[1
,3
]}

Zeng, Long-Hui ^{[1
,3
]}

Xie, Chao ^{[2
,3
]}

Yu, Yong-Qiang ^{[2
,3
]}

Liang, Feng-Xia ^{[2
,3
]}

Wu, Chun-Yan ^{[1
,3
]}

Wang, Li ^{[1
,3
]}

Hu, Ji-Gang ^{[1
,3
]}

机构：

[1] Hefei Univ Technol, Sch Elect Sci & Appl Phys, Hefei 230009, Anhui, Peoples R China

[2] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China

[3] Hefei Univ Technol, Anhui Prov Key Lab Adv Funct Mat & Devices, Hefei 230009, Anhui, Peoples R China

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

基金：

中国国家自然科学基金;

关键词：

SCHOTTKY JUNCTION; GRAPHENE FILM;

D O I：

10.1038/srep03914

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Heterojunctions near infrared (NIR) photodetectors have attracted increasing research interests for their wide-ranging applications in many areas such as military surveillance, target detection, and light vision. A high-performance NIR light photodetector was fabricated by coating the methyl-group terminated Si nanowire array with plasmonic gold nanoparticles (AuNPs) decorated graphene film. Theoretical simulation based on finite element method (FEM) reveals that the AuNPs@graphene/CH3-SiNWs array device is capable of trapping the incident NIR light into the SiNWs array through SPP excitation and coupling in the AuNPs decorated graphene layer. What is more, the coupling and trapping of freely propagating plane waves from free space into the nanostructures, and surface passivation contribute to the high on-off ratio as well.

引用

页数：8

共 45 条

[1] Tunable Graphene-Silicon Heterojunctions for Ultrasensitive Photodetection [J].