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Highly-efficient element and two-port beam splitter of multilayer-based grating

BO WANG1,* , LI CHEN1, LIANG LEI1, JINYUN ZHOU1

Affiliation

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

Abstract

Highly-efficient element and two-port beam splitter are key elements in various optical systems. We describe that such functions can be fulfilled by one multilayer-based grating. Based on the effective indices of the modes excited in the grating region, grating duty cycle and period are chosen so that the design is feasible. Exact grating depth and thickness of the connecting layer are optimized using rigorous coupled-wave analysis (RCWA). The numerical calculation using RCWA coincides well with predictions of modal method. In the novel design, efficiency of TE polarization is improved greatly compared with the reported dual-function element for the transmission structure..

Keywords

Modal method, Rigorous coupled-wave analysis, Multilayer-based grating, High efficiency, Beam splitter.

Submitted at: Sept. 21, 2011
Accepted at: Sept. 20, 2012

Citation

BO WANG, LI CHEN, LIANG LEI, JINYUN ZHOU, Highly-efficient element and two-port beam splitter of multilayer-based grating, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 9-10, pp. 769-773 (2012)