Anderson photon-phonon co-localization in certain random superlattices

Abstract

Fundamental concepts in quantum physics and technological applications ranging from the detection of gravitational waves to the generation of stimulated Brillouin scattering rely on the interaction between the optical and the mechanical degrees of freedom.\ A key parameter to engineer this interaction is the spatial overlap between the two fields, optimized in carefully designed resonators on a case-by-case basis.\ Disorder is an alternative strategy to confine light and sound at the nanoscale.\ However, it lacks an \textit{a priori} mechanism guaranteeing a high degree of co-localization due to the inherently complex nature of the underlying interference process.\ Here, we propose a way to address this challenge by using GaAs/AlAs vertical distributed Bragg reflectors with embedded geometrical disorder.\ Due to a remarkable coincidence in the physical parameters governing light and motion propagation in these two materials, the equations for both longitudinal acoustic waves in the growth direction and normal-incidence light become practically equivalent for excitations of the same wavelength.\ This guarantees spatial overlap between photons and phonons leading to a statistically significant enhancement in the vacuum optomechanical coupling rate, $g_0$, and making this system a promising candidate to explore Anderson localization of high frequency ($\sim$ 20 GHz) phonons enabled by cavity optomechanics.\

arXiv comment4 pages, 3 figures

References in corpus (16)

• Cavity Optomechanics
• Anderson Transitions
• Optomechanically induced transparency
• Quantum-coherent coupling of a mechanical oscillator to an optical cavity mode
• A microchip optomechanical accelerometer
• Localization of ultrasound in a three-dimensional elastic network
• Statistical Signatures of Photon Localization
• Coherent optical wavelength conversion via cavity-optomechanics
• A hybrid on-chip opto-nanomechanical transducer for ultra-sensitive force measurements
• Mechanical Resonators for Quantum Optomechanics Experiments at Room Temperature
• Red light for Anderson localization
• Controlled lasing from active optomechanical resonators
• Optomechanical properties of GaAs/AlAs micropillar resonators operating in the 18 GHz range
• Physics of quantum light emitters in disordered photonic nanostructures
• Anderson Localization of Composite Excitations in Disordered Optomechanical Arrays
• Optomechanical coupling in the Anderson-localization regime

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• Multimode optomechanics with a two-dimensional optomechanical crystal
• Fiber-based angular filtering for high-resolution Brillouin spectroscopy in the 20-300 GHz frequency range
• Silicon-on-insulator optomechanical microresonator with tight photon and phonon confinement
• Generating 10-GHz phonons in nanostructured silicon membrane optomechanical cavity
• Topological optical and phononic interface mode by simultaneous band inversion
• Ultralow radiative heat flux by Anderson localization in quasiperiodic plasmonic chains