Xuantong Shi, Bo Wang, Zherui Cui, Jinjie Li, Hongwei Zhan
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Dual-functional grating splitter with high efficiency at the second-order Littrow incidence
In this paper, a novel dual-functional grating beam splitter is presented, designed to exhibit unique diffraction characteristics for transverse electric (TE) and transverse magnetic (TM) polarizations at the second Bragg incidence angle. Optimal grating parameters were derived using a combination of rigorous coupled-wave analysis (RCWA) and simulated annealing algorithm (SAA). For TE polarization, the 0th order diffraction efficiency reached 97.04%. For TM polarization, efficiencies for the 0th, -1st, and -2nd orders were 32.09%, 32.65%, and 32.15%, respectively. Validation of these results was performed using the finite element method (FEM), confirming the accuracy of the data. The beam splitter demonstrates promising diffraction efficiency and uniformity, suggesting its potential in the realm of optical communications.
期刊介绍：
Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.
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