Indexed by:Journal Article

Date of Publication:2010-10-01

Journal:JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS

Included Journals:Scopus、EI、SCIE

Volume:27

Issue:10

Page Number:2141-2145

ISSN:0740-3224

Abstract:A device capable of adjusting gap plasmon (GP) transmission and intensity is proposed. The structure consists of two metallic films: one is etched with a nanoslit, and the other below is movable. Between them is a horizontal air channel. Numerical simulations show that the GP sources can produce alternatively in ports A and B when the film below is moved together with a groove in the center; thus, a sawtooth-like waveform is observed, which is different from the sine-like case without a groove and can be explained well by Fourier series. In addition, with the optimized length of film below, the source intensity can be further enhanced for Fabry-Perot resonance producing in both channels A and B. (C) 2010 Optical Society of America