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Design of a High-Transmission C-Shaped Nano-Aperture in a Perfectly Electric Conductor Film  

Park Sin-Jeung (연세대학교 기계공학과)
Hahn Jae-Won (연세대학교 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.23, no.6, 2006 , pp. 160-165 More about this Journal
Abstract
We have designed a high-transmission nano aperture in a perfect electric conductor film with the incident beam of 532 nm wavelength. The aperture basically has a C-shape and is known to produce a bright spot nearby the aperture in small size less than diffraction limit. The bright spot is strongly coupled with the local plasmon excited through the aperture hole. The characteristics of transmission and peak power of the aperture output were calculated using finite differential time domain (FDTD) technique, and the geometry of the aperture was determined to get a maximum transmission and peak power. To find the effect of the surface plasmon induced near by the aperture, we calculated the variations of the transmittance and the beam sizes by changing the size of the input beam irradiated on the aperture.
Keywords
Nano-aperture; Near-field; FDTD; Surface plasmon;
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