Non-exhibition of Bragg phenomenon by chevronic sculptured thin films

Vikas Vepachedu, Patrick D. Mcatee, Akhlesh Lakhtakia

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


The unit cell of a chevronic sculptured thin film (ChevSTF) comprises two identical columnar thin films (CTFs) except that the nanocolumns of the first are oriented at an angle Χ and nanocolumns of the second are oriented at an angle π ' χ with respect to the interface of the two CTFs. A ChevSTF containing 10 unit cells was fabricated and its planewave reflectance and transmittance spectrums of this ChevSTF were measured. Despite its structural periodicity, the ChevSTF did not exhibit the Bragg phenomenon. Theoretical calculations with the CTFs modeled as biaxial dielectric materials indicated that the Bragg phenomenon would not be manifested for normal and near-normal incidence, but vestigial manifestation was possible for sufficiently oblique incidence.

Original languageEnglish (US)
Title of host publicationNanostructured Thin Films X
EditorsTom G. Mackay, Yi-Jun Jen, Akhlesh Lakhtakia
ISBN (Electronic)9781510611696
StatePublished - 2017
EventNanostructured Thin Films X 2017 - San Diego, United States
Duration: Aug 9 2017Aug 10 2017

Publication series

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


OtherNanostructured Thin Films X 2017
Country/TerritoryUnited States
CitySan Diego

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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