Single layer spectro-polarimetric filter for advanced LWIR FPAs

A. M. Jones, S. A. Kemme, D. A. Scrymgeour, R. A. Norwood

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We explore the spectral and angular selectivity of near surface normal transmission of grating modified metallic surfaces and their ultimate potential for application as narrow-band spectro-polarimetric planar filter components in the development of advanced infrared focal plane arrays. The developed photonic microstructures exhibit tailored spectral transmission characteristics in the long wavelength infrared, and can be fabricated to preferentially transmit a given linear polarization within the design band. Modification of the material and structural properties of the diffractive optical element enables sub-pixel tuning of the spectro-polarimetric response of the device allowing for intelligent engineering of planar filter components for development of advanced focal plane arrays in the long wavelength infrared. The planar nature of the developed components leaves them immune to fabrication issues that typically plague thin film interference filters used for similar applications in the infrared, namely, deposition of multiple low-stress quarter-wavelength films and modification of the film thicknesses for each pixel. The solution developed here presents the opportunity for subpixel modification of the spectral response leading to an efficient, versatile filter component suitable for direct integration with commercially available focal plane array technologies via standard fabrication techniques. We will discuss the theoretical development and analysis of the described components and compare the results to the current state-of-the-art.

Original languageEnglish (US)
Title of host publicationInfrared Technology and Applications XXXVIII
ISBN (Print)9780819490315
StatePublished - 2012
Event38th Conference on Infrared Technology and Applications - Baltimore, MD, United States
Duration: Apr 23 2012Apr 27 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


Other38th Conference on Infrared Technology and Applications
Country/TerritoryUnited States
CityBaltimore, MD


  • FPA
  • LWIR
  • filter
  • focal plane array
  • long wavelength infrared
  • polarizer
  • subwavelength
  • transmission

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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