Xin Chen, Chao Qiu, Zhen Sheng, Aimin Wu, Haiyang Huang, Yingxuan Zhao, Wei Li, Xi Wang, Shichang Zou, Fuwan Gan. Design of an ultra-broadband and fabrication-tolerant silicon polarization rotator splitter with SiO2 top cladding[J]. Chinese Optics Letters, 2016, 14(8): 081301