High-Efficiency Low-Noise Optomechanical Crystal Photon-Phonon Transducers

• URL: http://arxiv.org/abs/2406.15701v1
• Date: Sat, 22 Jun 2024 01:05:36 GMT
• Title: High-Efficiency Low-Noise Optomechanical Crystal Photon-Phonon Transducers
• Authors: Sameer Sonar, Utku Hatipoglu, Srujan Meesala, David Lake, Hengjiang Ren, Oskar Painter,
• Abstract summary: Optomechanical crystals (OMCs) enable coherent interactions between optical photons and microwave acoustic phonons. thermal noise at cryogenic (millikelvin) temperatures is one of the primary limitations of performance for OMC-based quantum transducers.
• Score: 0.18472148461613155
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Optomechanical crystals (OMCs) enable coherent interactions between optical photons and microwave acoustic phonons, and represent a platform for implementing quantum transduction between microwave and optical signals. Optical absorption-induced thermal noise at cryogenic (millikelvin) temperatures is one of the primary limitations of performance for OMC-based quantum transducers. Here, we address this challenge with a two-dimensional silicon OMC resonator that is side-coupled to a mechanically detached optical waveguide, realizing a six-fold reduction in the heating rate of the acoustic resonator compared to prior state-of-the-art, while operating in a regime of high optomechanical-backaction and millikelvin base temperature. This reduced heating translates into a demonstrated phonon-to-photon conversion efficiency of 93.1 $\pm$ 0.8% at an added noise of 0.25 $\pm$ 0.01 quanta, representing a significant advance toward quantum-limited microwave-optical frequency conversion and optically-controlled quantum acoustic memories.

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