Two-port connecting-layer-based sandwiched grating by a polarization-independent design

Abstract

In this paper, a two-port connecting-layer-based sandwiched beam splitter grating with polarization-independent property is reported and designed. Such the grating can separate the transmission polarized light into two diffraction orders with equal energies, which can realize the nearly 50/50 output with good uniformity. For the given wavelength of 800 nm and period of 780 nm, a simplified modal method can design a optimal duty cycle and the estimation value of the grating depth can be calculated based on it. In order to obtain the precise grating parameters, a rigorous coupled-wave analysis can be employed to optimize grating parameters by seeking for the precise grating depth and the thickness of connecting layer. Based on the optimized design, a high-efficiency two-port output grating with the wideband performances can be gained. Even more important, diffraction efficiencies are calculated by using two analytical methods, which are proved to be coincided well with each other. Therefore, the grating is significant for practical optical photonic element in engineering.

Bio-inspired Sky Polarized Orientation based on the atmospheric polarization symmetry mode and Inertial Sensors

“…By calculating the included Angle of the vector and the ray direction in the vector field, this method can achieve accurate azimuth estimation [6]. The filtering algorithm proposed by Li et al (2020) uses Kalman filtering to optimize the obtained data after measuring the polarization vector, so as to improve the orientation accuracy [7].…”

High-efficiency two-dimensional diffraction grating

“…In recent years, it is possible to use diffraction grating as beam splitter due to the improvement of grating vector theory and microfabrication technology. A variety of methods have been proposed to realize the beam splitter based on the grating [1][2][3][4]. Because of the difficulty in design and manufacture of 2D diffraction gratings, most of them used as beam splitters are one-dimensional 1D gratings.…”

Review of pulse compression gratings for chirped pulse amplification system

“…ACG, MDG, and MMDG are the main stream PCGs attributed to their excellent optical performance and easy achievement. However, there are some other designs used as PCGs, such as transmission gratings, [38][39][40][41][42][43][44] synthetic aperture gratings, [45][46][47][48][49][50][51][52] photonic crystal gratings, [53][54][55] *Address all correspondence to Wenfei Zhang, zhangwenfei@sdut.edu.cn; Shenggui Fu, fushenggui@sdut.edu.cn guided mode resonant gratings, [56][57][58] total internal reflection gratings, [59][60][61] volume gratings, [62][63][64] connecting-layer gratings, [65][66][67] metal mirror-based gratings, 68 metal-dielectric gratings, [69][70][71] twolayer gratings, [72][73][74][75][76] and three-layer gratings. 77 Resulting from the scarce applications, we do not pay particular attentions to these gratings.…”