Angle and Polarization Insensitive Mid-Infrared Optical Filters Using Dense 2D Array of Nanophotonic Cavity Resonators

We report on the design and experimental verification of angle and polarization insensitive mid-infrared filters based on dense arrays of dielectric resonators embedded into a metallic film. We experimentally show filters with 60% peak transmission for angles from 0 to 60 degrees for perpendicular p...

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Bibliographic Details
Published inIEEE photonics journal Vol. 16; no. 2; pp. 1 - 6
Main Authors Klein, Matthew, Vangala, Shivashankar R., Hendrickson, Joshua R., Avrutsky, Ivan
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.04.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Arrays
Cavity resonators
Dielectrics
Infrared filters
Infrared photonics
Metals
Optical filters
Plasmonics
Plasmons
Polarization
resonant transmission
Resonator filters
Resonators
Substrates
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Summary:We report on the design and experimental verification of angle and polarization insensitive mid-infrared filters based on dense arrays of dielectric resonators embedded into a metallic film. We experimentally show filters with 60% peak transmission for angles from 0 to 60 degrees for perpendicular polarization states. We also study the surface plasmonic mode excited due to the periodicity of the micro-resonators in the array. Simulations support the experimental results for both the primary resonance and the plasmonic mode. Integrating these filters with IR detectors offers multispectral imaging and improved search and track capability.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2024.3381548