Space-variant polarization manipulation of a thermal emission by a polar material subwavelength grating supporting surface phonon-polaritons

Erez Hasman, Nir Dahan, Avi Niv, Gabriel Biener, Vladimir Kleiner

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Space-variant polarization manipulation of enhanced omnidirectional thermal emission in a narrow spectral peak is presented. The emission is attributed to surface phonon-polariton excitation from space-variant subwavelength SiO 2 gratings. Polarization manipulation was obtained by discretely controlling the local orientation of the grating. We experimentally demonstrated thermal emission in an axially symmetric polarization distribution. We show that by coupling surface phonon-polaritons to a propagating field, large anisotropy of the emissivity is obtained within a narrow spectral range. We experimentally demonstrate this effect by fabricating a space-variant subwavelength grating on a SiO2 substrate to encrypt an image in the polarization state of a thermal radiation field. Theoretical calculations based on rigorous coupled-wave analysis are presented along with experimental results.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
DOIs
StatePublished - 8 May 2006
Externally publishedYes
EventNanomanipulation with Light II - San Jose, CA, United States
Duration: 23 Jan 200624 Jan 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6131
ISSN (Print)0277-786X

Conference

ConferenceNanomanipulation with Light II
Country/TerritoryUnited States
CitySan Jose, CA
Period23/01/0624/01/06

Keywords

  • Encryption
  • Grating
  • Phonon
  • Polarization
  • Space-variant
  • Surface waves

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