团队硕士生董异航的工作--Silicon-integrated high-speed mode and polarization switch-and-selector（硅基高速模式偏振选择开关）相关成果近期被Journal of Semiconductor期刊接受发表，该工作得到了国家重点研发计划（2019YFB2203600）、国家自然科学基金（61975115/61835008/62035016）、上海市科学技术委员会（2017SHZDZX03）的部分资助。作者在硅基平台上提出了一种基于PN结马赫曾德尔结构的高速模式偏振选择开关。该开关可将任一输入端口输入的四个模式/偏振分量（TE0，TE1，TM0，TM1）路由到任一输出端口，实现导通和切换。该开关损耗串扰表现良好，响应时间在纳秒量级，为未来高速光网络提供了一种有效提升通信容量的方案。此外，该方案可以通过采用级联亚波长光栅为基础的定向耦合器很容易地扩展到更高阶模式。
摘要：On-chip optical communications are growingly aiming at multimode operation together with mode-division multiplexing to further increase the transmission capacity. Optical switches, which are capable of optical signals switching at the nodes, play a key role in optical networks. We demonstrate a 2 × 2 electro-optic Mach–Zehnder interferometer-based mode- and polarization-selective switch fabricated by standard complementary metal–oxide–semiconductor process. An electro optic tuner based on a PN-doped junction in one of the Mach–Zehnder interferometer arms enables dynamic switching in 11 ns. For all the channels, the overall insertion losses and inter-modal crosstalk values are below 9.03 and –15.86 dB at 1550 nm, respectively.
论文DOI：10.1088/1674-4926/43/2/022301 论文链接