Suppression of circular Bragg phenomenon in chiral sculptured thin films produced with simultaneous rocking and rotation of substrate during serial bideposition

Stephen E. Swiontek, Drew P. Pulsifer, Jian Xu, Akhlesh Lakhtakia

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

Abstract

Chiral sculptured thin films (STFs) produced by substrate rotation during physical vapor deposition exhibit the circular Bragg phenomenon, whereby normally incident left- and right-circularly polarized plane waves are discriminated in a spectral regime called the circular Bragg regime. Theory had predicted that substrate rocking, in synchrony with substrate rotation, during deposition, could suppress the propensity to exhibit the circular Bragg phenomenon. Therefore, ZnSe chiral STFs were fabricated with/without substrate rocking, and their transmittance spectrums for incident linearly and circularly polarized plane waves were measured. With sufficient rocking amplitude, the discrimination between incident left- and right-circularly polarized light nearly vanished, whereas a Bragg phenomenon for all normally incident plane waves was observed. Thus, chiral STF technology can be used to produce both ordinary and circular-polarization Bragg filters.

Original languageEnglish (US)
Title of host publicationNanostructured Thin Films V
DOIs
StatePublished - Dec 1 2012
EventNanostructured Thin Films V - San Diego, CA, United States
Duration: Aug 14 2012Aug 16 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8465
ISSN (Print)0277-786X

Other

OtherNanostructured Thin Films V
CountryUnited States
CitySan Diego, CA
Period8/14/128/16/12

All Science Journal Classification (ASJC) codes

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

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