The simulation of localized surface plasmon and surface plasmon polariton in wire grid polarizer integrated on InP substrate for InGaAs sensor

Abstract

We numerically demonstrate the integration of gold wire grid polarizer on InP substrate for InGaAs polarimetric imaging. The effective spectral range of wire grid polarizer has been designed in 0.8-3 μm according to InGaAs response waveband. The dips in TM transmission are observed due to surface plasmon (SPs) significantly damaging polarization performance. To further understand the coupling mechanism between gold wire grid grating and InP, the different contributions of surface plasmon polariton (SPP) and localized surface plasmon (LSP) to the dips are analyzed. Both transmission and reflectance spectra are simulated at different grating periods and duty cycles by finite-different time-domain (FDTD) method. LSP wavelength is located at around 1 μm and sensitive to the specific shape of metal wire. SPP presents higher resonance wavelength closely related to grating period. The simulations of electric field distribution show the same results.

Significant performance improvement of a terahertz photoconductive antenna using a hybrid structure

“…The highest photocurrent of 720 mA is obtained at P ¼ 260 nm and W ¼ 100 nm. When an electromagnetic wave interacts with a nanostructure, energy and momentum conservation between surface plasmon and incident wave has to be satised: 31,32 k sp ¼ k in sin q AE mk g .…”

Polarization-Sensitive and Wide Incidence Angle-Insensitive Fabry–Perot Optical Cavity Bounded by Two Metal Grating Layers

“…Division-of-focal-plane (DoFP) polarization imaging sensors have been widely studied because of their capability to acquire both the intensity and polarization information in real-time using a monolithically integrated focal plane array (FPA) with a micro-optical element (array of micropolarizers) [ 13 , 14 , 15 , 16 ]. Typically, the micropolarizer array consists of a 2 × 2 array of metallic subwavelength gratings oriented at 0, 45, 90, and 135° to simultaneously determine the first three Stokes parameters [ 17 , 18 , 19 , 20 ]. Metallic subwavelength gratings are one-dimensional periodic structures with much smaller than the wavelength of the light, which have been recognized as an effective polarizer candidate for the IR regime [ 21 , 22 , 23 , 24 ].…”