Sub-1 Volt and high-bandwidth visible to near-infrared electro-optic modulators

• DOI: 10.1038/s41467-023-36870-w
• Publication Date: 2023-03-27T10:03:12Z
• Authors: Dylan Renaud; Daniel Rimoli Ass...; Graham Joe; Amirhassan Shams-...; Di Zhu; Yaowen Hu; Neil Sinclair; Marko Loncar
• Keywords: VNIR

Abstract Integrated electro-optic (EO) modulators are fundamental photonics components with utility in domains ranging from digital communications to quantum information processing. At telecommunication wavelengths, thin-film lithium niobate exhibit state-of-the-art performance voltage-length product ( V π L ), optical loss, and EO bandwidth. However, applications imaging, optogenetics, science generally require devices operating the visible-to-near-infrared (VNIR) wavelength range. Here, we realize VNIR amplitude phase featuring ’s of sub-1 ⋅ cm, low high bandwidth response. Our Mach-Zehnder a as 0.55 cm at 738 nm, on-chip loss ~0.7 dB/cm, bandwidths excess 35 GHz. Furthermore, highlight opportunities these high-performance offer by demonstrating integrated frequency combs over 50 lines tunable spacing, shifting pulsed light beyond its intrinsic (up 7x Fourier limit) an shearing method.