Abstract

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.

© 2021 Optical Society of America

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Supplementary Material (1)

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» Supplement 1       Analytical calculation

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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