Photonics Research, 2019, 7 (3): 03000294, Published Online: Feb. 20, 2019  

Silica nanocone array as a template for fabricating a plasmon induced hot electron photodetector Download: 571次

Author Affiliations
1 Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
2 Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
3 LEES Program, Singapore-MIT Alliance for Research & Technology (SMART), Singapore 138602, Singapore
Abstract
Plasmon induced hot electrons have attracted a great deal of interest as a novel route for photodetection and light-energy harvesting. Herein, we report a hot electron photodetector in which a large array of nanocones deposited sequentially with aluminum, titanium dioxide, and gold films can be integrated functionally with nanophotonics and microelectronics. The device exhibits a strong photoelectric response at around 620 nm with a responsivity of 180 μA/W under short-circuit conditions with a significant increase under 1 V reverse bias to 360 μA/W. The increase in responsivity and a red shift in the peak value with increasing bias voltage indicate that the bias causes an increase in the hot electron tunneling effect. Our approach will be advantageous for the implementation of the proposed architecture on a vast variety of integrated optoelectronic devices.

Zhiqiang Yang, Kang Du, Fanfan Lu, Yang Pang, Shijia Hua, Xuetao Gan, Wending Zhang, Soo Jin Chua, Ting Mei. Silica nanocone array as a template for fabricating a plasmon induced hot electron photodetector[J]. Photonics Research, 2019, 7(3): 03000294.

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