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We design and optimize the sandwiched three port grating based on metal mirror configuration under normal incidence. By using the rigorous coupled wave analysis, grating parameters are analyzed and calculated incl uding grating groove depth, thickness of connecting layer, and so on. Such a new grating is aimed to separate energies into the 0th and the ±1st orders for both TE and TM polarizations. Based on the optimized grating parameters, efficiencies can reach more than 32% for each port with the polarization independent property. It indicates that reflection three port beam splitter with high efficiency can be obtained by the sandwiched grating..
Sand wiched grating, Three port, Metal mirror configuration, Reflective efficiency.
CHEN FU, BO WANG, WENHUA ZHU, JIMIN FANG, ZIMING MENG, ZHAOGANG NIE, XIANGJUN XING, LI CHEN, LIANG LEI, JINYUN ZHOU, Sandwiched three port grating based on metal mirror configuration, Optoelectronics and Advanced Materials - Rapid Communications, 13, 9-10, September-October 2019, pp.502-505 (2019).
Submitted at: Jan. 10, 2019
Accepted at: Oct. 9, 2019