Simple way for achieving passive all-optical switching of continuous waves lasers using pure nematic liquid crystal

C. Sheng, Q. Chen, R. A. Norwood, J. Wang, J. Thomas, N. Peyghambarian

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

We have examined pure nematic liquid crystal (LC), 4′-pentyl-4- biphenylcarbonitrile (5-CB), with a 90° twisted alignment within a cell made of two cross-polarized absorptive plastic polarizers, and investigated the nonlinear transmission properties using cw (532 nm) lasers.We observed optically self-activated polarization switching with a factor of three lower switching power than a dye-doped LC cell with similar linear transmittance using glass substrates.We also studied the dynamics of the switching processes and observed millisecond switching time.These studies have demonstrated a simpler but more efficient way for fabricating broadband, low switching power, millisecond time scale switching, and optical limiting devices.

Original languageEnglish (US)
Pages (from-to)5788-5790
Number of pages3
JournalApplied optics
Volume50
Issue number30
DOIs
StatePublished - Oct 20 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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