摘要
Using a lithium niobate （LN） material, we propose a broadband polarization beam splitter （PBS） with high efficiency by employing a negative refractive photonic crystal （PhC） wedge slab with an angle of 60°. It can split the incident light into two parts at about 90° with TE and TM polarizations. The transmissions of polarized light for an LN-based PBS are more than 80% with a broad angle and wavelength bandwidth of 8° and 70 nm at 1.55μm, while with a Si-based PhC, no PBS with high efficiency can be realized for the relatively lower transmission of TM output light.
Using a lithium niobate （LN） material, we propose a broadband polarization beam splitter （PBS） with high efficiency by employing a negative refractive photonic crystal （PhC） wedge slab with an angle of 60°. It can split the incident light into two parts at about 90° with TE and TM polarizations. The transmissions of polarized light for an LN-based PBS are more than 80% with a broad angle and wavelength bandwidth of 8° and 70 nm at 1.55μm, while with a Si-based PhC, no PBS with high efficiency can be realized for the relatively lower transmission of TM output light.
基金
supported by the National Natural Science Foundation of China under Grant Nos.11574208 and 1174204
