Single-periodic-film optical bandpass filter

Resonant periodic surfaces and films enable new functionalities with wide applicability in practical optical systems. Their material sparsity, ease of fabrication, and minimal interface count provide environmental and thermal stability and robustness in applications. Here we report an experimental b...

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Bibliographic Details
Published in:arXiv.org 2015-09
Main Authors: Niraula, Manoj, Yoon, Jae Woong, Magnusson, Robert
Format: Article
Language:English
Subjects:
Bandpass filters
Gratings (spectra)
Interface stability
Maxwell's equations
Sidebands
Substrates
Thermal stability
Thin films
Ultrawideband
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Summary:Resonant periodic surfaces and films enable new functionalities with wide applicability in practical optical systems. Their material sparsity, ease of fabrication, and minimal interface count provide environmental and thermal stability and robustness in applications. Here we report an experimental bandpass filter fashioned in a single patterned layer on a substrate. Its performance corresponds to bandpass filters requiring perhaps 30 traditional thin-film layers as shown by an example. We demonstrate an ultra-narrow, high-efficiency bandpass filter with extremely wide, flat, and low sidebands. This class of devices is designed with rigorous solutions of the Maxwell equations while engaging the physical principles of resonant waveguide gratings. The proposed technology is integration-friendly and opens doors for further development in various disciplines and spectral regions where thin-film solutions are traditionally applied.
ISSN:2331-8422