Journal
OPTICS LETTERS
Volume 46, Issue 15, Pages 3532-3535Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.432982
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This paper analyzes the resonant transmission of two near-field coupled, cascaded bandpass filters based on metallic stripe or patch gratings. The results show that the response of these structures surpasses the simple convolution of the responses of two isolated filters in terms of maximum efficiency and light rejection out of the resonance. The technological integration of such compact structures is particularly relevant for detection applications in the infrared and visible ranges.
We analyze the resonant transmission of two near-field coupled, cascaded bandpass filters, based on metallic stripe or patch gratings. The response, in terms of both maximum efficiency and light rejection out of the resonance, overpasses the simple convolution of the responses of two isolated filters, while keeping good angular tolerance. Illustrations are given in the infrared and visible ranges where the technological integration of such compact structures is particularly relevant for detection applications. (C) 2021 Optical Society of America
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