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- W1978238445 abstract "The electrical control of beam focusing via a plasmonic lens which is composed of an array of nanoslits perforated on a thin metallic film is presented. We use 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST), an organic material with a large electro-optical (EO) coefficient, as an incorporated material in the nanoslits to modulate the output beam by the external voltage. The two-dimensional finite-difference time-domain (2D FDTD) numerical method is utilized. We investigate the performance parameters of the proposed lens, including the focal length, full-width half-maximum (FWHM), depth of focus (DOF) and maximum intensity of the focal point. Our numerical simulations reveal the possibility of tuning the focal point up to 1175?nm. Surface plasmons (SPs) modes are considered in discussing the physical origin of the focusing effect. The proposed lens can be used as an efficient element in plasmonic integrated circuits and there are well-known techniques to fabricate it, such as focused ion beam (FIB) milling." @default.
- W1978238445 created "2016-06-24" @default.
- W1978238445 creator A5001818102 @default.
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- W1978238445 date "2012-10-22" @default.
- W1978238445 modified "2023-09-27" @default.
- W1978238445 title "Electrically tunable light focusing via a plasmonic lens" @default.
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