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Polarization-independent grating with the zeroth order suppressed

ZEFAN LIN1, BO WANG1,* , CHENHAO GAO1, KUNHUA WEN1, ZIMING MENG1, ZHAOGANG NIE1, FANGTENG ZHANG1, XIANGJUN XING1, LI CHEN1, LIANG LEI1, JINYUN ZHOU1

Affiliation

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China

Abstract

In this paper, a polarization-independent grating with the suppression of the zeroth order under normal incidence is introduced. In order to suppress the zeroth order, the rigorous coupled-wave method is used to optimize height of the grating groove and the thickness of the connecting layer, where the total efficiency of the +1st order and the -1st order is greater than 90%. The modal method can explain the physical mechanism of the grating transmission and the 0th order suppression. Then the process tolerance of the grating is studied, which provides a basis for the design of the zeroth order suppressed..

Keywords

Polarization-independent grating, Beam splitter, Suppression of the zeroth order.

Submitted at: Sept. 1, 2019
Accepted at: Feb. 15, 2021

Citation

ZEFAN LIN, BO WANG, CHENHAO GAO, KUNHUA WEN, ZIMING MENG, ZHAOGANG NIE, FANGTENG ZHANG, XIANGJUN XING, LI CHEN, LIANG LEI, JINYUN ZHOU, Polarization-independent grating with the zeroth order suppressed, Journal of Optoelectronics and Advanced Materials Vol. 23, Iss. 1-2, pp. 1-5 (2021)