Nonlinear optical transmission of lead phthalocyanine- Doped nematic liquid crystal composites for multiscale nonlinear switching from nanosecond to continuous wave

Chuan Xiang Sheng, Robert A. Norwood, Jiafu Wang, Jayan Thomas, Diane Steeves, Brian Kimball, N. Peyghambarian

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We have formulated composites of lead (II) tetrakis (4-cumylphenoxy) phthalocyanine (PbTCPc) doped into nematic liquid crystal (LC), 4'-pentyl-4-biphenylcarbonitrile (5-CB), that has received a 90° twisted alignment and investigated the nonlinear transmission properties using both pulsed (Nd:YLF 524 nm, 5 ns) and cw (532 nm) lasers. In the nanosecond regime, this compound is a reverse saturable absorber performing similarly to low-concentration solutions of PbTCPc. Under cw conditions, we observe optically self-activated polarization switching with low threshold input energy. Our results suggest the potential for an all-optical switch working from the nanosecond time scale to cw.

Original languageEnglish (US)
Pages (from-to)2731-2734
Number of pages4
JournalApplied optics
Volume48
Issue number14
DOIs
StatePublished - May 10 2009

ASJC Scopus subject areas

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

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