Surface vibrational modes in disk-shaped resonators

Dmitriev, A.; Gritsenko, Dmitry; Mitrofanov, V. P.

doi:10.1016/j.ultras.2013.11.002

Cited by 3 publications

(4 citation statements)

References 19 publications

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“…The r-mode is a singleton group and has the lowest frequency dispersion branch and characterized by a phase velocity lower than both the longitudinal (V l ) and transverse (V t ) bulk velocities ( fig. 3a) [27,34], as shown from the displacement profile in fig. 3e; such a surface wave localization compromises its overlap with the optical mode.…”

Section: Device Designmentioning

confidence: 95%

“…are the contributions from the longitudinal (l) and transverse (t) waves to each displacement component [34],…”

Section: Photo-elastic Contributionmentioning

confidence: 99%

“…The mechanical dispersion is the starting point to infer general characteristics of the phase-matched mechanical modes that will lead to the Brillouin scattering in microdisk cavities. Many aspects of the mechanical modes dispersion of sd and dd cavities can be regarded as mixtures among whispering gallery modes of an infinite cylinder and Lamb-wave modes of a free-standing silicon slab [27,34]. The mechanical mode dispersion of a single disk for even and odd modes (with respect to z = 0 plane -see fig.…”

Section: Device Designmentioning

confidence: 99%

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Brillouin Optomechanics in Coupled Silicon Microcavities

Espinel

Santos

Luiz

et al. 2017

Sci Rep

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The simultaneous control of optical and mechanical waves has enabled a range of fundamental and technological breakthroughs, from the demonstration of ultra-stable frequency reference devices, to the exploration of the quantum-classical boundaries in optomechanical laser-cooling experiments. More recently, such an optomechanical interaction has been observed in integrated nano-waveguides and microcavities in the Brillouin regime, where short-wavelength mechanical modes scatter light at several GHz. Here we engineer coupled optical microcavities to enable a low threshold excitation of mechanical travelling-wave modes through backward stimulated Brillouin scattering. Exploring the backward scattering we propose silicon microcavity designs based on laterally coupled single and double-layer cavities, the proposed structures enable optomechanical coupling with very high frequency modes (11 to 25 GHz) and large optomechanical coupling rates (g0/2π) from 50 kHz to 90 kHz.

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Section: Device Designmentioning

confidence: 95%

“…are the contributions from the longitudinal (l) and transverse (t) waves to each displacement component [34],…”

Section: Photo-elastic Contributionmentioning

confidence: 99%

Section: Device Designmentioning

confidence: 99%

See 1 more Smart Citation

Brillouin Optomechanics in Coupled Silicon Microcavities

Espinel

Santos

Luiz

et al. 2017

Sci Rep

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“…With this assumption, it is further possible to employ a well-developed theory of vibrations for solid plates. [36][37][38][39] An approach developed to describe the oscillations of a single spherical bubble [40][41][42][43][44] is not applicable for a trapped bubble. It is however possible to use a theory for the bubble interactions [45][46][47] including the simplest case, bubble pair, that employs the notions of microstreaming and SRF.…”

Section: Introductionmentioning

confidence: 99%

Vibrational modes prediction for water-air bubbles trapped in circular microcavities

et al. 2018

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Oscillating bubbles have proven to be a versatile tool for various microfluidic applications. Despite the existence of the extensive literature on the behavior of acoustically actuated bubbles, a readyto-use approach, capable of predicting the oscillatory motion for the bubbles trapped in the circular microcavities, is still missing. In this study, we propose a theoretical model to quantify the resonant frequencies and viscous dissipation factors for a single trapped bubble and verify it experimentally. We further investigate an interaction of two coupled bubbles of equal and different radii. For the identical bubble pair, coupling results in controllable frequency shift from the modes of a single bubble, whereas the non-identical one can operate as a flow switch.

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Brillouin optomechanics in nanophotonic structures

2019

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The interaction between light and mesoscopic mechanical degrees of freedom has been investigated under various perspectives, from spectroscopy in condensed matter, optical tweezer particle trapping, and long-haul optical fiber communication system penalties to gravitational-wave detector noise. In the context of integrated photonics, two topics with dissimilar origins—cavity optomechanics and guided wave Brillouin scattering—are rooted in the manipulation and control of the energy exchange between trapped light and mechanical modes. In this tutorial, we explore the impact of optical and mechanical subwavelength confinement on the interaction among these waves, coined as Brillouin optomechanics. At this spatial scale, optical and mechanical fields are fully vectorial and the common intuition that more intense fields lead to stronger interaction may fail. Here, we provide a thorough discussion on how the two major physical effects responsible for the Brillouin interaction—photoelastic and moving-boundary effects—interplay to foster exciting possibilities in this field. In order to stimulate beginners into this growing research field, this tutorial is accompanied by all the discussed simulation material based on a widespread commercial finite-element solver.

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Surface vibrational modes in disk-shaped resonators

Cited by 3 publications

References 19 publications

Brillouin Optomechanics in Coupled Silicon Microcavities

Brillouin Optomechanics in Coupled Silicon Microcavities

Vibrational modes prediction for water-air bubbles trapped in circular microcavities

Brillouin optomechanics in nanophotonic structures

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