Enhancement of light absorption by Au L/S grating for thin SOI photodetector

This paper proposes a silicon-on-insulator (SOI) photodetector with gold (Au) line and space. (L/S) grating, which enhances light absorption via optical near-field by surface plasmon (SP) around the grating. Behavior of the enhanced light absorption for various grating widths, adjustment of the peak absorption wavelength, and dependence on the polarization of the incident light are discussed based on the electromagnetic simulations.