期刊
OPTICS EXPRESS
卷 29, 期 2, 页码 2720-2726出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.403932
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资金
- National Major Research and Development Program [2018YFB2200200]
- National Science Fund for Distinguished Young Scholars [61725503]
- National Natural Science Foundation of China [61961146003, 91950205]
A silicon-based polarizing beam splitter working at the 2 mu m wavelength band is proposed and experimentally demonstrated, with high extinction ratios and low excess losses. The fabricated PBS shows extinction ratios of >15 dB and >20 dB for TM- and TE-polarizations in the wavelength band of 1860-1980 nm.
A silicon-based polarizing beam splitter (PBS) working at the 2 mu m wavelength band is proposed and demonstrated experimentally by using a bent directional coupler assisted with a nano-slot waveguide. The nano-slot width is chosen as 180 nm so that the present PBS can be fabricated with MPW foundries. In theory, the designed PBS has extinction ratios (ERs) of >15 dB and >30 dB for TM- and TE- polarizations in the wavelength range of 1825-2020 nm, respectively. For the fabricated PBS, the excess losses (ELs) are low (similar to 0.5 dB) while the measured results show the ERs are >15 dB and >20 dB for TM- and TE-polarizations in the wavelength band of 1860-1980 nm. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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