Related Experiment Video
Updated: Aug 15, 2026
Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
Published on: July 18, 2015
Numerical study on spectral properties of tungsten one-dimensional surface-relief gratings for spectrally selective
Hitoshi Sai1, Yoshiaki Kanamori, Kazuhiro Hane
1Toyota Technological Institute, Hisakata 2-12-1, Tempaku-ku, Nagoya, 468-851, Japan. sai@toyota-ti.ac.jp
Abstract:
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.
