Multi-harmonic Quantum Dot Optomechanics in fused LiNbO${}_3$-(Al)GaAs hybrids

Abstract

We fabricated an acousto-optic semiconductor hybrid device for strong optomechanical coupling of individual quantum emitters and a surface acoustic wave. Our device comprises a surface acoustic wave chip made from highly piezoelectric LiNbO${}_3$ and a GaAs-based semiconductor membrane with an embedded layer of quantum dots. Employing multi-harmonic transducers, we generated sound waves on LiNbO${}_3$ over a wide range of radio frequencies. We monitored their coupling to and propagation across the semiconductor membrane both in the electrical and optical domain. We demonstrate enhanced optomechanical tuning of the embedded quantum dots with increasing frequencies. This effect was verified by finite element modelling of our device geometry and attributed to an increased localization of the acoustic field within the semiconductor membrane. For moderately high acoustic frequencies, our simulations predict strong optomechanical coupling making our hybrid device ideally suited for applications in semiconductor based quantum acoustics.

arXiv commentrevised manuscript. unit conversion error fixed

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• Quantum dot optomechanics in suspended nanophononic strings
• Acoustically modulated optical emission of hexagonal boron nitride layers
• A Hybrid (Al)GaAs-LiNbO${}_3$ Surface Acoustic Wave Resonator for Cavity Quantum Dot Optomechanics
• Dynamic strain modulation of a nanowire quantum dot compatible with a thin-film lithium niobate photonic platform
• Heterogeneous integration of superconducting thin films and epitaxial semiconductor heterostructures with Lithium Niobate
• A frequency-tunable nanomembrane mechanical oscillator with embedded quantum dots
• Light modulation in Silicon photonics by PZT actuated acoustic waves
• Dark Exciton Giant Rabi Oscillations with no External Magnetic Field
• Topical review on acousto-optical Floquet engineering of single-photon emitters
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