2026-10-13T20:40:35Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34046802 2026-10-01T16:00:28Z category_37476 portal_1023 item_type_12 month_year_10_2026

Mode-selective acousto-electric modulation of phonons in a silicon photonic platform Ruoyu Yuan (14515064) Yishu Zhou (14363832) Matthew J. Storey (14409387) Ryan O. Behunin (3962183) Haotian Cheng (11153549) Betul Sen (12524497) Andrew L. Starbuck (14362731) Douglas C. Trotter (14362734) Andrew L. Leenheer (25157307) Matt Eichenfield (3985301) Nils T. Otterstrom (14409384) Peter T. Rakich (1718557) Physics (arXiv) physics.optics (arXiv) Acousto-electric (AE) interactions enable electrical control of acoustic propagation through piezoelectric media. Bringing AE control onto integrated photonic platforms provides a powerful on-chip control mechanism to reconfigure both the acoustic propagation through piezoelectric media. Bringing AE control onto integrated photonic platforms provides a powerful on-chip control mechanism to reconfigure both the acoustic delay line response and the effective photon-phonon interaction by electrically tuning the phonon propagation. Here we report a mode-selective AE modulation effect in a scalable aluminum nitride on silicon-on-insulator (AlN-on-SOI) platform. An applied DC field is seen to modulate the phonon dissipation via changes in carrier concentration in a mode-selective fashion, producing up to 20 dB forward transmission suppression of non-fundamental modes within an acoustic delay line while maintaining the fundamental Rayleigh mode, a phenomenon not captured by conventional AE treatments. To probe these dynamics, we integrate an optical waveguide along the acoustic delay line, providing a broadband, non-destructive interface between the acoustic and optical domains. Leveraging both this optical interface and the underlying mode selectivity, we demonstrate proof-of-concept multi-domain transduction and Rayleigh-mode filtering on this hybrid platform, outlining a scalable path toward electrically reconfigurable mode engineering and microwave-photonic functionality. 2026-09-28T00:00:00Z Text Preprint 10.48550/arXiv.2609.36198 https://figshare.com/articles/preprint/Mode-selective_acousto-electric_modulation_of_phonons_in_a_silicon_photonic_platform/34046802 CC0