Photoelastic coupling in gallium arsenide optomechanical disk resonators

Baker, Christopher G.; Hease, William; Nguyen, Doan; Andronico, A.; Ducci, S.; Leo, Giuseppe; Favero, Iván

doi:10.1364/oe.22.014072

Cited by 100 publications

(113 citation statements)

References 35 publications

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“…The optomechanical coupling rate g 0 has been calculated with a perturbative approach [30][31][32] which accounts for the geometric and the photo-elastic contributions. We used bulk photoelastic coefficients for GaAs, (p 11 , p 12 , p 44 ) = (−0.165, 0.140, −0.072) [33]. With these values, the photoelastic contribution to g 0 is roughly 15%.…”

Section: Resultsmentioning

confidence: 99%

Acoustic confinement in superlattice cavities

García-Sánchez

Deléglise²,

Thomas

et al. 2016

Phys. Rev. A

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The large coupling rate between the acoustic and optical fields confined in GaAs/AlAs superlattice cavities makes them appealing systems for cavity optomechanics. We have developed a mathematical model based on the scattering matrix that allows the acoustic guided modes to be predicted in nano and micropillar superlattice cavities. We demonstrate here that the reflection at the surface boundary considerably modifies the acoustic quality factor and leads to significant confinement at the micropillar center. Our mathematical model also predicts unprecedented acoustic Fano resonances on nanopillars featuring small mode volumes and very high mechanical quality factors, making them attractive systems for optomechanical applications.

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Section: Resultsmentioning

confidence: 99%

Acoustic confinement in superlattice cavities

García-Sánchez

Deléglise²,

Thomas

et al. 2016

Phys. Rev. A

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“…1(a) and (b), are fabricated out of a GaAs/Aluminium Gallium Arsenide (AlGaAs) hetero-structure wafer [30]. A picture of the complete sample structure is shown in the Supplemental Material ( gallery modes (WGMs) and mechanical radial breathing modes (RBMs) [31] that strongly couple through radiation pressure and photoelasticity, reaching an optomechanical coupling g 0 in the MHz range [32]. This enables fine optical control of mechanical motion in a large variety of physical environments, from cryogenic quantum operation to liquid immersion [33,34].…”

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confidence: 99%

Light-Mediated Cascaded Locking of Multiple Nano-Optomechanical Oscillators

et al. 2017

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Collective phenomena emerging from non-linear interactions between multiple oscillators, such as synchronization and frequency locking, find applications in a wide variety of fields. Optomechanical resonators, which are intrinsically non-linear, combine the scientific assets of mechanical devices with the possibility of long distance controlled interactions enabled by travelling light. Here we demonstrate light-mediated frequency locking of three distant nano-optomechanical oscillators positioned in a cascaded configuration. The oscillators, integrated on a chip along a coupling waveguide, are optically driven with a single laser and oscillate at gigahertz frequency. Despite an initial frequency disorder of hundreds of kilohertz, the guided light locks them all with a clear transition in the optical output. The experimental results are described by Langevin equations, paving the way to scalable cascaded optomechanical configurations.Synchronization and frequency locking have been observed in a large variety of contexts ranging from physics to biology, e.g. in classical coupled pendula [1], in coupled lasers [2], and in the rhythmic beating of pacemaker cells [3]. These phenomena have found practical applications in RF communication [4], signal-processing [5], novel computing and memory concepts [6,7], clock synchronization and navigation [8], as well as in phased locked loop circuits [9]. For these applications, micro-and nano-mechanical devices are known to present opportunities of integration and scalability [10][11][12][13][14][15] but more recently, optomechanical systems further emerged as new appealing candidates. Indeed they support non-linearly coupled optical and mechanical modes [16,17], and add to the mechanics the assets of optical techniques in terms of precision and long-distance communications [18][19][20][21][22][23][24][25].Light injected in an optomechanical cavity can deform it under the action of optical forces, and in the dynamical backaction regime can amplify its mechanical motion. When amplification overcomes mechanical dissipation, the system transits to a stable limit cycle, often referred to as optomechanical self-oscillation [26,27]. In the last years, several studies investigated the synchronization of such optomechanical oscillators [20][21][22]25]. The synchronization of two oscillators placed close to contact and sharing a common optical mode was reported in [20]. Recently, the same configuration was pushed up to 7 resonators [25]. Two spatially-separated oscillators integrated in a common optical racetrack cavity were also synchronized in [22]. The possibility of locking two optomechanical systems without sharing a common optical mode was implemented as well in [21], in two steps and with two lasers. The optical output of a first laser-driven optomechanical oscillator was transduced into an electrical signal, which was carried away to fed a distant electro-optic modulator. The latter modulated a second laser driving a second optomechanical oscillator, ultimately insuring phase lo...

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“…Nevertheless, such a technique has rarely been used for whispering gallery mode (WGM) resonators, despite their ubiquity in current photonic research, from opto-mechanics [9] and quantum optics [10] to bio-physics [11]. Most demonstrations of WGM cathodoluminescence images have been demonstrated with wide band gap materials such as GaN [12] and ZnO [13] while recourse to HCL remains anecdotal [5].…”

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confidence: 99%