Room temperature, cavity-free capacitive strong coupling to mechanical motion

article Room temperature, cavity-free capacitive strong coupling to mechanical motion published yes Denise Puglia author 4D495994-AE37-11E9-AC72-31CAE56974250000-0003-1144-2763 Rachel H Odessey author 9a7a5123-8972-11ed-ae7b-dd1f2af457bd Peter Burns author Niklas Luhmann author Silvan Schmid author Andrew P Higginbotham author 4AD6785A-F248-11E8-B48F-1D18A9856A870000-0003-2607-2363 AnHi department Cavity electromechanics across a quantum phase transition project Surface Charge and Tunneling Multi-Mode Imaging project The back-action damping of mechanical motion by electromagnetic radiation is typically overwhelmed by internal loss channels unless demanding experimental ingredients such as superconducting resonators, high-quality optical cavities, or large magnetic fields are employed. Here we demonstrate the first room temperature, cavity-free, all-electric device where back-action damping exceeds internal loss, enabled by a mechanically compliant parallel-plate capacitor with a nanoscale plate separation and an aspect ratio exceeding 1,000. The device has 4 orders of magnitude lower insertion loss than a comparable commercial quartz crystal and achieves a position imprecision rivaling optical interferometers. With the help of a back-action isolation scheme, we observe radiative cooling of mechanical motion by a remote cryogenic load. This work provides a technologically accessible route to high-precision sensing, transduction, and signal processing. American Chemical Society2025 eng Nano Letters 1530-6984 1530-6992 2407.15314 00141524600000110.1021/acs.nanolett.4c05796 2572749-2755 https://research-explorer.ista.ac.at/record/18143 D. Puglia, R. H. Odessey, P. Burns, N. Luhmann, S. Schmid, and A. P. Higginbotham, “Room temperature, cavity-free capacitive strong coupling to mechanical motion,” Nano Letters, vol. 25, no. 7. American Chemical Society, pp. 2749–2755, 2025. Puglia D, Odessey RH, Burns P, Luhmann N, Schmid S, Higginbotham AP. 2025. Room temperature, cavity-free capacitive strong coupling to mechanical motion. Nano Letters. 25(7), 2749–2755. Puglia, Denise, et al. “Room Temperature, Cavity-Free Capacitive Strong Coupling to Mechanical Motion.” Nano Letters, vol. 25, no. 7, American Chemical Society, 2025, pp. 2749–55, doi:<a href="https://doi.org/10.1021/acs.nanolett.4c05796">10.1021/acs.nanolett.4c05796</a>. Puglia, Denise, Rachel H Odessey, Peter Burns, Niklas Luhmann, Silvan Schmid, and Andrew P Higginbotham. “Room Temperature, Cavity-Free Capacitive Strong Coupling to Mechanical Motion.” Nano Letters. American Chemical Society, 2025. <a href="https://doi.org/10.1021/acs.nanolett.4c05796">https://doi.org/10.1021/acs.nanolett.4c05796</a>. D. Puglia, R.H. Odessey, P. Burns, N. Luhmann, S. Schmid, A.P. Higginbotham, Nano Letters 25 (2025) 2749–2755. Puglia, D., Odessey, R. H., Burns, P., Luhmann, N., Schmid, S., & Higginbotham, A. P. (2025). Room temperature, cavity-free capacitive strong coupling to mechanical motion. Nano Letters. American Chemical Society. <a href="https://doi.org/10.1021/acs.nanolett.4c05796">https://doi.org/10.1021/acs.nanolett.4c05796</a> Puglia D, Odessey RH, Burns P, Luhmann N, Schmid S, Higginbotham AP. Room temperature, cavity-free capacitive strong coupling to mechanical motion. Nano Letters. 2025;25(7):2749-2755. doi:<a href="https://doi.org/10.1021/acs.nanolett.4c05796">10.1021/acs.nanolett.4c05796</a> 190262025-02-16T23:02:34Z2025-09-30T10:29:58Z