Design of a release-free piezo-optomechanical quantum transducer

• URL: http://arxiv.org/abs/2408.15134v1
• Date: Tue, 27 Aug 2024 15:13:41 GMT
• Title: Design of a release-free piezo-optomechanical quantum transducer
• Authors: Paul Burger, Joey Frey, Johan Kolvik, David Hambraeus, Raphaël Van Laer,
• Abstract summary: A promising approach to quantum microwave-optics transduction uses an intermediary mechanical mode along with piezo-optomechanical interactions. Here, we introduce a release-free, i.e. non-suspended, piezo-optomechanical transducer. We propose and design a silicon-on-sapphire (SOS) release-free transducer with appealing piezo- and optomechanical performance.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum transduction between microwave and optical photons could combine the long-range connectivity provided by optical photons with the deterministic quantum operations of superconducting microwave qubits. A promising approach to quantum microwave-optics transduction uses an intermediary mechanical mode along with piezo-optomechanical interactions. So far, such transducers have been released from their underlying substrate to confine mechanical fields -- preventing proper thermal anchoring and creating a noise-efficiency trade-off resulting from optical absorption. Here, we introduce a release-free, i.e. non-suspended, piezo-optomechanical transducer intended to circumvent this noise-efficiency trade-off. We propose and design a silicon-on-sapphire (SOS) release-free transducer with appealing piezo- and optomechanical performance. Our proposal integrates release-free lithium niobate electromechanical crystals with silicon optomechanical crystals on a sapphire substrate meant to improve thermal anchoring along with microwave and mechanical coherence. It leverages high-wavevector mechanical modes firmly guided on the chip surface. Beyond quantum science and engineering, the proposed platform and design principles are attractive for low-power acousto-optic systems in integrated photonics.

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