V. E. Stenger, J. Toney, A. Pollich, D. Brown, B. Griffin, R. Nelson, and S. Sriram, “Low Loss and Low Vpi Thin Film Lithium Niobate on Quartz Electro-optic Modulators,” Proc. European Conference on Optical Communication, Tu.2.C.5, 2017.
M. Zhang, C. Wang, X. Chen, M. Bertrand, A. Sham-Ansari, S. Chandrasekhar, P. Winzer, and M. Loncar, “Ultra-High Bandwidth Integrated Lithium Niobate Modulators with Record-Low Vπ,” Proc. Optical Fiber Communication Conference, Th4A.5, 2018.