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Proceedings Paper

An optical nano-antenna structure of metallic ball array for enhancement of near-infrared photodetection
Author(s): Pengfei Yao; Tao Li; Xue Li; Xiumei Shao; Haimei Gong
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Paper Abstract

This work is aimed at designing an optical nano-antenna structure to enhance the optical absorption in 1.0−1.7 μm and improve the performance of InP-based InGaAs sensors. We report comprehensive analysis of an optical nano-antenna structure of metallic ball array for surface plasmon enhancement of near-infrared photodetection. The enhancement capability of metallic ball array on InP substrate with periodicity in the range of 600−1200 nm and diameters in the range 100−300nm has been studied by theoretical modeling with a finite-difference time-domain(FDTD) method. Our simulation results show that the highest transmission efficiency is achieved when the diameter of the ball is around and the optimized periodicity of the ball array is around 800nm. After comparing the transmission spectra of the arrays made of different metals, silver is found to be the best. Because of the speciality of SPP modes, the enhancement relative to wavelengths near 1.1μm is obviously weaker than that near longer wavelengths. Coating a SiO2 film about 500nm over the arrays is found to be an effective solution to achieve higher transmission efficiency around 1.1μm.

Paper Details

Date Published: 24 October 2017
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Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 104622Y (24 October 2017); doi: 10.1117/12.2284991
Show Author Affiliations
Pengfei Yao, Shanghai Institute of Technical Physics (China)
Univ. of Chinese Academy of Sciences (China)
Tao Li, Shanghai Institute of Technical Physics (China)
Xue Li, Shanghai Institute of Technical Physics (China)
Xiumei Shao, Shanghai Institute of Technical Physics (China)
Haimei Gong, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 10462:
AOPC 2017: Optical Sensing and Imaging Technology and Applications
Yadong Jiang; Haimei Gong; Weibiao Chen; Jin Li, Editor(s)

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