摘要
We propose a Y-type polarization beam splitter based on internal polarization-selective defects within crystal waveguides in a two-dimensional square-lattice photonic crystal with solid rods. When the nonpolarized light launches from the input port, different polarizations will be separated and can only transmit through their own channel. It is demonstrated by finite element method that the proposed structure can achieve good performance for both the transverse electric and transverse magnetic polarizations in a wide range of wave- length, with the polarization extinction ratio more than 25 dB, the degree of polarization nearly 1, and the insert loss less than 0.5 dB, respectively.
We propose a Y-type polarization beam splitter based on internal polarization-selective defects within crystal waveguides in a two-dimensional square-lattice photonic crystal with solid rods. When the nonpolarized light launches from the input port, different polarizations will be separated and can only transmit through their own channel. It is demonstrated by finite element method that the proposed structure can achieve good performance for both the transverse electric and transverse magnetic polarizations in a wide range of wave- length, with the polarization extinction ratio more than 25 dB, the degree of polarization nearly 1, and the insert loss less than 0.5 dB, respectively.
基金
This work was supported by the National Natural Science Foundation of China （Nos. 61307048 and 61275043）, the Guangdong Province National Science Foundation（No. 8251806001000004）, the Shenzhen Science Bureau （Nos. 200805 and CXB201105050064A）, the Specialized Research Fund for the Shenzhen Strategic Emerging Industries Development （Nos. JCYJ20120613115000529 and JCYJ20120614085204873）, and the Specialized Research Fhnd for the Doctoral Program of Higher Education of China （No. 20114408120004）.
