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- W4308202320 abstract "In silicon and other photonic integrated circuit platforms many devices exhibit a large polarization dependency, therefore a polarization beam splitter (PBS) is an essential building block to split optical signal to transversal electric (TE) and transversal magnetic (TM) modes. In this paper we propose a concept of integrated silicon-based PBS exploiting unique properties of all dielectric metamaterial cladding to achieve a high extinction ratio ( ER ) and wide bandwidth ( BW ) polarization splitting characteristics. We start from a structure (PBS-1) based on a directional coupler with metamaterial cladding combined with a bent waveguide with metamaterial cladding at the outer side in the role of a TE polarizer at the Thru port of the device. To increase BW we propose the improved concept (PBS-2) - a metamaterial compact dual Mach-Zehnder Interferometer structure in combination with the TE polarizer. Numerical simulations reveal that an exceptionally high ER over 35 dB can be achieved in a BW of 263 nm with insertion loss ( IL ) below 1 dB in case of PBS-2. The designed device has a footprint of 82 µm. Measurement results reveal that an ER > 30 dB is achievable in a BW of at least 140 nm (limited by the laser tuning range)." @default.
- W4308202320 created "2022-11-09" @default.
- W4308202320 creator A5036500839 @default.
- W4308202320 creator A5059226047 @default.
- W4308202320 creator A5074291965 @default.
- W4308202320 date "2022-12-07" @default.
- W4308202320 modified "2023-10-16" @default.
- W4308202320 title "High extinction ratio and an ultra-broadband polarization beam splitter in silicon integrated photonics by employing an all-dielectric metamaterial cladding" @default.
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- W4308202320 doi "https://doi.org/10.1364/oe.476333" @default.
- W4308202320 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36558615" @default.
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