Bidirectional surface wave splitter at visible frequencies

Qiaoqiang Gan, Filbert J. Bartoli

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46 Scopus citations

Abstract

We experimentally demonstrate a metal-film bidirectional surface wave splitter for guiding light at two visible wavelengths in opposite directions. Two nanoscale gratings were patterned on opposite sides of a subwavelength slit. The metallic surface grating structures were tailored geometrically to have different plasmonic bandgaps, enabling each grating to guide light of one wavelength and prohibit propagation at the other wavelength. The locations of the bandgaps were experimentally confirmed by interferometric measurements. Based on these design principles, a green-red bidirectional surface wave splitter is demonstrated, and the observed optical properties are shown to agree with theoretical predictions. © 2010 Optical Society of America.
Original languageEnglish (US)
Pages (from-to)4181-4183
Number of pages3
JournalOptics Letters
Volume35
Issue number24
DOIs
StatePublished - Dec 15 2010
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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