Electronically controlled surface plasmon dispersion and optical transmission through metallic hole arrays using liquid crystal

Wayne Dickson, Gregory Wurtz, Paul R. Evans, Robert J. Pollard, Anatoly Zayats

Research output: Contribution to journalArticlepeer-review

227 Citations (Scopus)

Abstract

The enhanced optical properties of metal films periodically perforated with an array of sub-wavelength size holes have recently been widely studied in the field of surface plasmon optics. The ability to design the optical transmission of such nanostructures, which act as plasmonic crystals, by varying their geometrical parameters gives them great flexibility for numerous applications in photonics, opto-electronics, and sensing. Transforming these passive optical elements into devices that may be actively controlled has presented a new challenge. Here, we report on the realization of an electrically controlled nanostructured optical system based on the unique properties of surface plasmon polaritonic crystals in contact with a liquid crystal (LC) layer. We discuss the effect of LC layer modulation on the surface plasmon dispersion, the related optical transmission and the underlying mechanism. The reported effect may be used to achieve active spectral tuneability and switching in a wide range of applications.

Original languageEnglish
Pages (from-to)281-286
Number of pages6
JournalNano Letters
Volume8
Issue number1
DOIs
Publication statusPublished - Jan 2008

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