Multi-band enhanced graphene photodetector based on localized surface plasmon

被引：13

作者：

Suo, Hao ^{[1
]}

Yang, Shuming ^{[1
]}

Ji, Peirui ^{[1
]}

Wang, Yiming ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Shanxi, Peoples R China

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2021年 / 322卷

基金：

国家重点研发计划;

关键词：

Graphene; Nanoparticals; Plasmon; Photodetector; Responsivity; HOLLOW SPHERES; LAYER; FILMS;

D O I：

10.1016/j.sna.2021.112627

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, a graphene photodetector modified with both gold nanoparticles and silver nanoparticles was discussed. The performance of the photodetector was improved by the common electrode structure prepared by transferring graphene on the top of the device. The gold nanoparticles and silver nanoparticles prepared via the annealing process can excite localized surface plasmon under illumination, and the photoresponse of the photodetector in the wavelength range of 400-470 nm and 510-620 nm. The responsivity increased by up to 2.8 times. As the photosensitive material, graphene on the top participated in photoelectric response, improving the performance of the photodetector in the wavelength range of 400-850 nm, and realized 1.4-1.5 times performance improvement in the wide-band range. Through the above improvements, the responsivity of the photodetector under 400-470 nm and 510-620 nm illumination increased by 2-4 times; the specific detectivity under 450 nm illumination increased by 2.7 times, and the external quantum efficiency increased by 400 %. Therefore, the photodetector can achieve enhancement in its multi-band selective response and improvement in its optical detection performance in a wide-band range. (c) 2021 Elsevier B.V. All rights reserved.

引用

页数：9

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