| 1 | Compact low-birefringence polarization beam splitter using vertical-dual-slot waveguides in silicon carbide integrated platforms显示文摘The polarization beam splitter is a key component for polarization manipulation in photonic integrated circuits,but it is challenging to design for low-refractive-index optical materials,due to the low birefringence of the waveguides.We propose what we believe is a novel compact vertical-dual-slot waveguide-based coupling scheme for silicon carbide,enabling efficient low-birefringence polarization splitting by extensively modulating the transverse-magnetic mode distribution.We numerically and experimentally demonstrate the device in the 4H-siliconcarbide-on-insulator integrated platform,with a small footprint of 2.2 μm × 15 μm.The device,easy to fabricate via a single lithography process as other components on the chip,exhibits low insertion loss of <0.71 dB and <0.51 dB for the transverse-electric and transverse-magnetic polarized light,respectively,and polarization extinction ratio of >13 dB,over 80 nm wavelength range. | XIAODONG SHI JINGJING ZHANG WEICHEN FAN YAOQIN LU NIANHUA PENG KARSTEN ROTTWITT AND HAIYAN OU | 2022 | Photonics Research2022，10，1： | 1 |
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