A new technical paper titled “Integrated phononic waveguide on thin-film lithium niobate on diamond” was published by researchers at Stanford University and UC Santa Barbara.
Abstract
“We demonstrate wavelength-scale phononic waveguides formed by transfer-printed thin-film lithium niobate (LN) on bulk diamond (LNOD), a material stack that combines the strong piezoelectricity of LN with the high acoustic velocity and color-center compatibility of diamond. We characterize a delay line based on a 100 micron long phononic waveguide at room and cryogenic temperatures. The total insertion loss through the device at 4 kelvin is -5.8 dB, corresponding to a >50% transducer efficiency, at a frequency of 2.8 gigahertz. Our work represents a step towards phonon-mediated hybrid quantum systems consisting of strain-sensitive color centers in diamond.”
Find the technical paper here. May 2025.
Malik, Sultan, Felix M. Mayor, Wentao Jiang, Hyunseok Oh, Carl Padgett, Viraj Dharod, Jayameenakshi Venkatraman, Ania C. Bleszynski Jayich, and Amir H. Safavi-Naeini. “Integrated phononic waveguide on thin-film lithium niobate on diamond.” arXiv preprint arXiv:2505.23100 (2025).
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