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Nano Lett. 2008 Nov;8(11):4048-52. doi: 10.1021/nl802981q. Epub 2008 Oct 11.

Electrooptic modulation in thin film barium titanate plasmonic interferometers.

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1
Applied Physics, California Institute of Technology, Pasadena, California 91125, USA.

Abstract

We demonstrate control of the surface plasmon polariton wavevector in an active metal-dielectric plasmonic interferometer by utilizing electrooptic barium titanate as the dielectric layer. Arrays of subwavelength interferometers were fabricated from pairs of parallel slits milled in silver on barium titanate thin films. Plasmon-mediated transmission of incident light through the subwavelength slits is modulated by an external voltage applied across the barium titanate thin film. Transmitted light modulation is ascribed to two effects, electrically induced domain switching and electrooptic modulation of the barium titanate index.

PMID:
18847247
DOI:
10.1021/nl802981q
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