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Photonics for Quantum (PfQ)

Broadband electro-optic modulation at blue wavelengths in thin-film lithium niobate

Nicholas Achuthan, Xudong Li, Leticia S. Magalhaes, Xinrui Zhu, Hana Warner, Xiangying Zuo, Sophie Weiyi Ding, Keith B. Powell, Dylan L. Renaud, Daniel Assumpção, Michael B Pushkarsky, Amirhassan Shams‐Ansari, Marko Lončar

Published Jul 18, 2025• 0 citations
Publisher

Abstract

Ion-based quantum systems need scalable visible-light control. We demonstrate thin-film lithium niobate modulators operating at 493 nm with more than 50 GHz bandwidth, enabling integrated, high-speed beam control for hyperfine transitions in barium ion qubits.
DOI
10.1117/12.3062752

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Lithium niobate-on-insulator (LNOI) is a leading platform for high-speed optical communication technologies owing to its large electro-optic bandwidth, which enables light modulation above 100 GHz [1]. The wide transparency window is being leveraged to produce photonic integrated circuits operating at different wavelengths, and the strong second-order nonlinearity allows efficient frequency conversion via periodic poling of the crystal on the same waveguide network [2]. LNOI has potential to revolutionise optical communication, and nonlinear conversion processes can be used to generate highly pure quantum states acting as bits of information for the next generation of optical quantum information technologies.