Abstract
We report comprehensive analysis of two-dimensional metallic square-hole array with a square lattice for surface plasmon enhancement of mid-wavelength infrared photodetection. Our results show that the highest transmission efficiency is achieved when hole side is around half of periodicity and the optimized thickness of the metal layer for the array is about twice of the surface plasmon-polariton penetration depth into the metal. By comparing the transmission and the reflection spectra of the arrays made of different metals, gold is found to be the best.
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Acknowledgments
This work is supported by the Economic Development Board (NRF2013SAS-SRP001-019), the Ministry of Education (RG86/13), A*Star (1220703063), Singapore and Asian Office of Aerospace Research and Development (FA2386-14-1-0013).
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This article is part of the Topical Collection on Numerical Simulation of Optoelectronic Devices, NUSOD’ 15.
Guest Edited by Julien Javaloyes, Weida Hu, Slawek Sujecki and Yuh-Renn Wu.
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Qiu, S., Tobing, L.Y.M., Tong, J. et al. Two-dimensional metallic square-hole array for enhancement of mid-wavelength infrared photodetection. Opt Quant Electron 48, 203 (2016). https://doi.org/10.1007/s11082-016-0472-7
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DOI: https://doi.org/10.1007/s11082-016-0472-7