Integrated phononic waveguide on thin-film lithium niobate on diamond
We demonstrate wavelength-scale phononic waveguides formed by transfer-printed thin-film lithium niobate (LN) on bulk diamond, 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 μm long phononic waveguide at room and cryogenic temperatures. The total insertion loss through the device at 4 K is −5.8 dB, corresponding to a >50 % transducer efficiency, at a frequency of 2.8 GHz. Our work represents a step toward phonon-mediated hybrid quantum systems consisting of strain-sensitive color centers in diamond.
Authors
- Viraj Dharod (ORCID: https://orcid.org/0000-0003-1608-4483)
- Hyunseok Oh (ORCID: https://orcid.org/0000-0003-0076-3844)
- Wentao Jiang (ORCID: https://orcid.org/0000-0002-6592-4322)
- Carl Padgett (ORCID: https://orcid.org/0000-0002-5072-1485)
- Felix M. Mayor (ORCID: https://orcid.org/0000-0001-9849-3517)
- Amir H. Safavi‐Naeini (ORCID: https://orcid.org/0000-0001-6176-1274)
- Ania C. Bleszynski Jayich (ORCID: https://orcid.org/0000-0003-3480-7032)
- Sultan Malik (ORCID: https://orcid.org/0009-0003-6200-2837)
- Jayameenakshi Venkatraman (ORCID: https://orcid.org/0000-0002-1736-3807)
Institutions
- University of California, Santa Barbara (US)
- Stanford University (US)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2025-10-13
- DOI
- https://doi.org/10.1063/5.0285138
- Citations
- 1
- Primary Topic
- Photorefractive and Nonlinear Optics
- Type
- article
- Field-Weighted Citation Impact
- 1.25