Luhua Xu, Deng Mao, Jinsong Zhang, Yun Wang, Zhenping Xing, Md Samiul Alam, Maxime Jacques, Yannick D'Mello, Santiago Bernal, David V. Plant. Broadband Polarization Beam Splitters Based on MMI Couplers with Internal Photonic Crystals Fabricated Using 193 nm Photolithography. In Optical Fiber Communications Conference and Exhibition, OFC 2021, San Francisco, CA, USA, June 6-10, 2021. pages 1-3, IEEE, 2021. [doi]