https://doi.org/10.1140/epjp/s13360-023-04495-z
Regular Article
Metal film inverted T-shaped modeling splitter for dual/triple-port operation
1
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, 510006, Guangzhou, China
2
Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, 510006, Guangzhou, China
Received:
9
February
2023
Accepted:
16
September
2023
Published online:
25
September
2023
We describe a dual/triple-port splitter based on an inverted T-shaped metal grating. Under normal incidence, the grating parameters are optimized by the finite element method, and the results are verified by rigorous coupled wave analysis. In this study, the wavelength of incident light is 1.55 μm. At TE polarization, the diffraction efficiency of the zeroth order can achieve 32.18%, and the diffraction efficiencies of ± 1st orders can achieve 32.02%. At TM polarization, the reflection efficiency of the zeroth order is suppressed, and the diffraction efficiencies of ± 1st orders can achieve 47.11%. In addition, numerical analysis shows that the grating has a simple structure and stable performance, so it has wide application prospects in optical polarization devices, laser systems, polarization imaging, etc.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
