TY - JOUR
T1 - Numerical study on spectral properties of tungsten one-dimensional surface-relief gratings for spectrally selective devices
AU - Sai, Hitoshi
AU - Kanamori, Yoshiaki
AU - Hane, Kazuhiro
AU - Yugami, Hiroo
PY - 2005/9
Y1 - 2005/9
N2 - Spectral properties of one-dimensional tungsten gratings with various depths and widths of grooves were investigated by means of finite-difference time-domain simulation with a multi-Lorentz model. Shallow gratings showed a strong absorption peak due to surface plasmon polaritons when the oscillation of the electric field was parallel to the grating vector. On the other hand, deep gratings with wide grooves showed a different absorption attributed to the microcavity effect when the oscillation of the electric field was perpendicular to the grating vector. With narrowed grooves, another absorption with d-dependence occurred, which was probably due to vertically oscillating surface plasmons to the grooves.
AB - Spectral properties of one-dimensional tungsten gratings with various depths and widths of grooves were investigated by means of finite-difference time-domain simulation with a multi-Lorentz model. Shallow gratings showed a strong absorption peak due to surface plasmon polaritons when the oscillation of the electric field was parallel to the grating vector. On the other hand, deep gratings with wide grooves showed a different absorption attributed to the microcavity effect when the oscillation of the electric field was perpendicular to the grating vector. With narrowed grooves, another absorption with d-dependence occurred, which was probably due to vertically oscillating surface plasmons to the grooves.
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U2 - 10.1364/JOSAA.22.001805
DO - 10.1364/JOSAA.22.001805
M3 - Article
C2 - 16211807
AN - SCOPUS:25444475839
VL - 22
SP - 1805
EP - 1813
JO - Journal of the Optical Society of America A: Optics and Image Science, and Vision
JF - Journal of the Optical Society of America A: Optics and Image Science, and Vision
SN - 0740-3232
IS - 9
ER -