TY - JOUR
T1 - Polarization dependent enhanced optical transmission through a sub-wavelength polygonal aperture surrounded by polygonal grooves
AU - Nazari, Tavakol
AU - Khazaeinezhad, Reza
AU - Kassani, Sahar Hosseinzadeh
AU - Jung, Woohyun
AU - Shin, Inchul
AU - Kang, Dooeui
AU - Oh, Kyunghwan
N1 - Publisher Copyright:
©2014 Optical Society of America
PY - 2014
Y1 - 2014
N2 - Enhanced optical transmission (EOT) and its polarization extinction ratio (PER) of a sub-wavelength polygonal aperture surrounded by polygonal grooves are investigated numerically by finite difference time domain (FDTD) method. Effects of light polarization on EOT were analyzed and compared for four types of geometrical structures: triangle aperture surrounded by triangle grooves, square aperture surrounded by square grooves, rhombus aperture surrounded by rhombus grooves, and pentagon aperture surrounded by pentagon grooves. The effects of relative angles between the symmetry axes of polygons and the light polarization were thoroughly analyzed. Among these plasmonic polygonal bull's eye structures, the rhombus showed a maximum EOT several times larger than others. In contrast to the prior normal incident condition, we further analyzed the impacts of the incident angle and we found a wideband tunability of EOT wavelengths.
AB - Enhanced optical transmission (EOT) and its polarization extinction ratio (PER) of a sub-wavelength polygonal aperture surrounded by polygonal grooves are investigated numerically by finite difference time domain (FDTD) method. Effects of light polarization on EOT were analyzed and compared for four types of geometrical structures: triangle aperture surrounded by triangle grooves, square aperture surrounded by square grooves, rhombus aperture surrounded by rhombus grooves, and pentagon aperture surrounded by pentagon grooves. The effects of relative angles between the symmetry axes of polygons and the light polarization were thoroughly analyzed. Among these plasmonic polygonal bull's eye structures, the rhombus showed a maximum EOT several times larger than others. In contrast to the prior normal incident condition, we further analyzed the impacts of the incident angle and we found a wideband tunability of EOT wavelengths.
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U2 - 10.1364/OE.22.027476
DO - 10.1364/OE.22.027476
M3 - Article
AN - SCOPUS:84920019692
VL - 22
SP - 27476
EP - 27488
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 22
ER -