High photon-phonon pair generation rate in a two-dimensional optomechanical crystal

Felix M. Mayor (), Sultan Malik, André G. Primo, Samuel Gyger, Wentao Jiang, Thiago P. M. Alegre and Amir H. Safavi-Naeini ()
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Felix M. Mayor: Stanford University
Sultan Malik: Stanford University
André G. Primo: Stanford University
Samuel Gyger: Stanford University
Wentao Jiang: Stanford University
Thiago P. M. Alegre: Universidade Estadual de Campinas (UNICAMP)
Amir H. Safavi-Naeini: Stanford University

Nature Communications, 2025, vol. 16, issue 1, 1-7

Abstract: Abstract Integrated optomechanical systems are a leading platform for manipulating, sensing, and distributing quantum information, but are limited by residual optical heating. Here, we demonstrate a two-dimensional optomechanical crystal (OMC) geometry with increased thermal anchoring and a mechanical mode at 7.4 GHz, well aligned with the operation range of cryogenic microwave hardware and piezoelectric transducers. The eight times better thermalization than current one-dimensional OMCs, large optomechanical coupling rates, g0/2π ≈ 880 kHz, and high optical quality factors, Qopt = 2.4 × 105, allow ground-state cooling (nm = 0.32) of the acoustic mode from 3 K and entering the optomechanical strong-coupling regime. In pulsed sideband asymmetry measurements, we show ground-state operation (nm

Date: 2025
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DOI: 10.1038/s41467-025-57948-7

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