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Published November 2008 | public
Journal Article

Electrooptic Modulation in Thin Film Barium Titanate Plasmonic Interferometers


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.

Additional Information

Copyright © 2008 American Chemical Society. Received October 1, 2008. Publication Date (Web): October 11, 2008. We acknowledge financial support from the National Science Foundation, under Grant DMR 0606472, and the Army Research Office; portions of this work were performed in facilities sponsored by the Center for Science and Engineering of Materials, an NSF MRSEC. We also gratefully acknowledge helpful discussions with Jennifer Dionne, Rene DeWaele, and Stanley Burgos.

Additional details

August 22, 2023
October 17, 2023