Zhang, Jiali, Kedi Peng, Jiaqi Ran, Yaomin Wu, Jiadong Xiao, Yujian Chen, Yarou Chen, Ou Xu, and Quandong Huang. “Mode-Group (De)Multiplexer Based on Directional Coupler Formed by Heterogeneous Integrated Waveguides”. Journal of Optics and Photonics Research 3, no. 1 (February 26, 2026): 59–66. Accessed March 22, 2026. https://ojs.bonviewpress.com/index.php/JOPR/article/view/3675.