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论文类型： 期刊论文

发表时间： 2010-10-01

发表刊物： JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS

收录刊物： SCIE、EI、Scopus

卷号： 27

期号： 10

页面范围： 2141-2145

ISSN号： 0740-3224

摘要： 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