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Hybrid SWM-IR narrow bandpass filters with high optical density

journal contribution
posted on 2024-11-03, 09:29 authored by Xin He, Xiaoming Shen, Paul BeckettPaul Beckett, Duo Xiao, Xu Liu, Rui Yin
Narrow bandpass filters (NBFs), which are designed to accept a narrow wavelength range and simultaneously reject a much wider range, show great potential in applications such as spectral imaging, lidar detection, fluorescence microscopy, and others. In this paper, we propose and numerically simulate NBF technology for infrared (IR) optical applications. The filter is a combination of plasmonic nanostructures and improved induced transmission layers. The operating wavelength range is from 1360 to 5000 nm [short wave mid-infrared radiation(SWM-IR)], with a FWHM of less than 10 nm and maximum optical density of around 10. Therefore, our SWM-IR hybrid filter can distinguish much smaller differences in terms of spectrum information and reduce the background noise level even if using an optical amplifier.

History

Journal

Applied Optics

Volume

62

Issue

15

Start page

4074

End page

4079

Total pages

6

Publisher

Optica

Place published

United States

Language

English

Copyright

© 2023 Optica Publishing Group

Former Identifier

2006124478

Esploro creation date

2023-08-16

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