Liquid-crystals for tunable photonic crystals, frequency selective surfaces and negative index material development

I. C. Khoo, Yana Williams, Andres Diaz, Kan Chen, J. A. Bossard, L. Li, D. H. Werner, E. Graugnard, J. S. King, S. Jain, C. J. Summers

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We present the results of experimental and theoretical studies that demonstrate the feasibility of realizing electro-optical switching, frequency filtering and negative index of refraction. In liquid crystal infiltrated TiO 2 inverse opal 3-D photonic crystals, we observed a sizeable electrical tuning of the Bragg reflection peak. In frequency selective structures with a liquid crystal over-layer, the tuning range can be as wide as 380 nm, operational throughout the entire visible - far infrared spectra range. Furthermore, some of the structures can be designed to exhibit a negative index of refraction property over a predetermined frequency interval.

Original languageEnglish (US)
Pages (from-to)309-319
Number of pages11
JournalMolecular crystals and liquid crystals
Volume453
Issue number1
DOIs
StatePublished - Sep 1 2006

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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