title: Design study for transmission improvement of resonant surface plasmons using dielectric diffraction gratings.
abstract: A transmission-type surface plasmon resonance configuration with dielectric gratings regularly patterned on a silver film was investigated with the aim of enhancing the diffraction efficiency of radiative surface plasmons. The theoretical work was conducted using rigorous coupled-wave analysis in terms of first order diffraction efficiency and conversion efficiency (CE). The results show that pyramid gratings can produce a higher transmittance compared with other grating profiles. Design optimization of the pyramid grating at a wide range of grating thicknesses and periods resulted in a maximum transmittance that was larger than 77% and a peak CE of about 85%. This study demonstrates the potential of using transmitted surface plasmon waves in various optical devices, such as optical biosensors, optical imaging systems, and polarization filters.
authors.affiliation: Interdisciplinary Program of Bioengineering, Seoul National University, Seoul, South Korea 152-742.
authors.forename: Seung Ho
authors.initials: SH
authors.lastname: Choi
authors.forename: Sung June
authors.initials: SJ
authors.lastname: Kim
authors.forename: Kyung Min
authors.initials: KM
authors.lastname: Byun
mesh_terms: D008962:Models, Theoretical; D055096:Optical Devices / Q000706:statistics & numerical data; D055620:Optical Phenomena; D020349:Surface Plasmon Resonance / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data