Accession Number:

AD1090129

Title:

Angle- and Polarization-Independent Mid-Infrared Narrowband Optical Filters Using Dense Arrays of Resonant Cavities (Preprint)

Descriptive Note:

Journal Article - Open Access

Corporate Author:

Air Force Research Laboratory Wright-Patterson AFB United States

Report Date:

2019-12-23

Pagination or Media Count:

15.0

Abstract:

We report design and experimental verification of narrowband mid-infrared optical filters with transmission characteristics that are practically constant over a wide range of incident angles. The filter employs a dense array of dielectric resonant cavities in a metal film, where the transmission of each cavity depends upon localized rather than travelling fields, making the filter fundamentally angle-independent. We show experimentally a transmission around 90 from normal incidence up to 60. Simulations show that the filter becomes polarization-independent when geometry of the cavities is azimuthally symmetric.

Subject Categories:

  • Fiber Optics and Integrated Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE