[1] X. Wang, G. Zhou, Z. Jin, L. Lu, G. Wu, L. Zhou, J. Chen. Wavelength-mode pulse interleaver on the silicon photonics platform. Chin. Opt. Lett., 18, 031301(2020).

[2] Y. Zhang, Y. He, X. Jiang, B. Liu, C. Qiu, Y. Su, R. A. Soref. Ultra-compact and highly efficient silicon polarization splitter and rotator. APL Photon., 1, 091304(2016).

[3] T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J.-I. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, H. Morita. Microphotonics devices based on silicon microfabrication technology. IEEE J. Sel. Top. Quantum Electron., 11, 232(2005).

[4] W. Bogaerts, R. Baets, P. Dumon, V. Wiaux, S. Beckx, D. Taillaert, B. Luyssaert, J. V. Campenhout, P. Bienstman, D. V. Thourhout. Nanophotonic waveguides in silicon-on-insulator fabricated with CMOS technology. J. Lightwave Technol., 23, 401(2005).

[5] D. Dai, K. Ma, H. Wu. “Mode/polarization manipulation in silicon photonics. J. Phys. Conf. Series, 844, 012039(2017).

[6] S. Keyvaninia, H. Boerma, M. Wössner, F. Ganzer, P. Runge, M. Schell. Highly efficient passive InP polarization rotator-splitter. Opt. Express, 27, 25872(2019).

[7] J. Wang, B. Niu, Z. Sheng, A. Wu, W. Li, X. Wang, S. Zou, M. Qi, F. Gan. Novel ultra-broadband polarization splitter-rotator based on mode-evolution tapers and a mode-sorting asymmetric Y-junction. Opt. Express, 22, 13565(2014).

[8] H. Liang, R. Soref, J. Mu. Compact polarization splitter based on a silicon angled multimode interferometer structure. Appl. Opt., 58, 4070(2019).

[9] Y. Ding, H. Ou, C. Peucheret. Wideband polarization splitter and rotator with large fabrication tolerance and simple fabrication process. Opt. Lett., 38, 1227(2013).

[10] B. Bai, L. Pei, J. Zheng, T. Ning, J. Li. Ultra-short plasmonic polarization beam splitter-rotator using a bent directional coupler. Chin. Opt. Lett., 18, 041301(2020).

[11] Z. Ying, G. Wang, X. Zhang, H.-P. Ho, Y. Huang. Ultracompact and broadband polarization beam splitter based on polarization-dependent critical guiding condition. Opt. Lett., 40, 2134(2015).

[12] J. Wang, B. Niu, Z. Sheng, A. Wu, X. Wang, S. Zou, M. Qi, F. Gan. Design of a SiO2 top-cladding and compact polarization splitter-rotator based on a rib directional coupler. Opt. Express, 22, 4137(2014).

[13] L. Liu, Y. Ding, K. Yvind, J. M. Hvam. Silicon-on-insulator polarization splitting and rotating device for polarization diversity circuits. Opt. Express, 19, 12646(2011).

[14] Y. Xiong, J. G. Wangüemert-Pérez, D.-X. Xu, J. H. Schmid, P. Cheben, W. N. Ye. Polarization splitter and rotator with subwavelength grating for enhanced fabrication tolerance. Opt. Lett., 39, 6931(2014).

[15] B. Bai, L. Liu, Z. Zhou. Ultracompact, high extinction ratio polarization beam splitter-rotator based on hybrid plasmonic-dielectric directional coupling. Opt. Lett., 42, 4752(2017).

[16] Y. Xiong, D.-X. Xu, J. H. Schmid, P. Cheben, S. Janz, W. N. Ye. Fabrication tolerant and broadband polarization splitter and rotator based on a taper-etched directional coupler. Opt. Express, 22, 17458(2014).

[17] C. Xie, X. Zou, P. Li, L. Yan, W. Pan. Ultracompact silicon polarization splitter-rotator using a dual-etched and tapered coupler. Appl. Opt., 59, 9540(2020).

[18] Y. He, Y. Zhang, X. Wang, B. Liu, X. Jiang, C. Qiu, Y. Su, R. Soref. Silicon polarization splitter and rotator using a subwavelength grating based directional coupler. Optical Fiber Communication Conference, Th1G.6(2017).

[19] Y. Zhang, Y. He, H. Wang, L. Sun, Y. Su. Ultra-broadband mode size converter using on-chip metamaterial-based Luneburg lens. ACS Photon., 8, 202(2021).

[20] Y. Wang, M. Ma, H. Yun, Z. Lu, X. Wang, N. A. F. Jaeger, L. Chrostowski. Ultra-compact sub-wavelength grating polarization splitter-rotator for silicon-on-insulator platform. IEEE Photon. J., 8, 7805709(2016).

[21] Y. Liu, S. Wang, Y. Wang, W. Liu, H. Xie, Y. Yao, Q. Song, X. Zhang, Y. Yu, K. Xu. Subwavelength polarization splitter-rotator with ultra-compact footprint. Opt. Lett., 44, 4495(2019).

[22] K. Yu, L. Wang, W. Wu, Y. Luo, Y. Yu. Demonstration of an on-chip broadband polarization splitter and rotator using counter-tapered coupler. Opt. Commun., 431, 58(2019).

[23] C. Yuan, J. Dai, H. Jia, J. Ding, L. Zhang, X. Fu, L. Yang. Design of a C-band polarization rotator-splitter based on a mode-evolution structure and an asymmetric directional coupler. J. Semicond., 39, 124008(2018).