Circular Grating Resonators as Small Mode-Volume Microcavities for Switching

Schönenberger, Sophie; Moll, Nikolaj; Stöferle, Thilo; Mahrt, Rainer F.; Offrein, Bert Jan; Götzinger, Stephan; Sandoghdar, Vahid; Bolten, Jens; Wahlbrink, T.; Plötzing, Tobias; Waldow, Michael; Först, Michael

doi:10.1364/oe.17.005953

Cited by 18 publications

(11 citation statements)

References 31 publications

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“…Similar findings have been concluded by Schönenberger et al by comparison to rigorous solutions to a rotationally symmetric setup. 1 We have exported field distributions for all near fields in the investigated wavelength range and we have found similar whispering-gallery-like resonances at all resonance frequencies with sharp features in the transmission spectrum. A wavelength for which the fundamental resonance with main field localization in the central disc would be excited has not been found in the investigated wavelength range.…”

Section: D Simulation Of Transmission Through a Circular Grating Resmentioning

confidence: 69%

“…In a recent experiment, high-Q resonances and switching in such a devices, fabricated with silicon-on-insulator technology, have been demonstrated. 1 Rigorous 3D Maxwell solvers are helpful in the design of such structures, however, due to the complex structure of CGRs and due to the large volume of the computational domains, accurate computation of field distributions and Q factors in 3D CGR setups is numerically challenging. 1 In a recent publication it has been theoretically shown that CGRs in cylindrically symmetric setups allow to reach very high Q values.…”

Section: Introductionmentioning

confidence: 99%

“…1 Rigorous 3D Maxwell solvers are helpful in the design of such structures, however, due to the complex structure of CGRs and due to the large volume of the computational domains, accurate computation of field distributions and Q factors in 3D CGR setups is numerically challenging. 1 In a recent publication it has been theoretically shown that CGRs in cylindrically symmetric setups allow to reach very high Q values. 2 We have developed finite-element method (FEM) based solvers for the Maxwell resonance mode and for the Maxwell scattering problems.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of optical resonances in circular grating resonators

2010

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Section: D Simulation Of Transmission Through a Circular Grating Resmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of optical resonances in circular grating resonators

2010

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“…2 a-b)). Such structure have successfully being used to confine photonic [22][23][24] and plasmonic [25][26][27] modes. The mechanical waves reflected by this circular grating can be understood using the onedimensional approximation shown in Fig.…”

mentioning

confidence: 99%

Hybrid confinement of optical and mechanical modes in a bullseye optomechanical resonator

Santos¹,

Espinel²,

Luiz³

et al. 2017

Opt. Express

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Optomechanical cavities have proven to be an exceptional tool to explore fundamental and technological aspects of the interaction between mechanical and optical waves. Such interactions strongly benefit from cavities with large optomechanical coupling, high mechanical and optical quality factors, and mechanical frequencies larger than the optical mode linewidth, the so called resolved sideband limit. Here we demonstrate a novel optomechanical cavity based on a disk with a radial mechanical bandgap. This design confines light and mechanical waves through distinct physical mechanisms which allows for independent control of the mechanical and optical properties. Our device design is not limited by unique material properties and could be easily adapted to allow large optomechanical coupling and high mechanical quality factors with other promising materials. Finally, our demonstration is based on devices fabricated on a commercial silicon photonics facility, demonstrating that our approach can be easily scalable.Optomechanical microcavities simultaneously confine optical and mechanical modes. The interaction between these confined modes has proven to be a very rich field of study for basic science such as macroscopic quantum phenomena [1,2], quantum simulation of condensed matter phenomena [3,4], topological phase pattern-formation of coupled oscillators [5] and non-classical states of light [6,7]. Technological questions have been addressed by optomechanical devices as well, with applications including weak-force sensing [8][9][10], ultra-sensitive accelerometers [11], radio-frequency sources [12], multimode [13] and synchronous [14] oscilators, reconfigurable optical filters [15] and hybrid systems [16].Regardless of the context, the optomechanical interaction often benefits from a large optomechanical coupling rate, low optical and mechanical dissipation rates (highQs) and the so-called resolved sideband limit, which occurs when the mechanical mode frequency is larger than the optical mode linewidth. The optomechanical coupling rate is denoted by g 0 and measures the optical cavity frequency shift induced by a mechanical mode with an amplitude equivalent to the quantum harmonic oscillator at ground-state.The challenge in simultaneously achieving an optimum combination of these properties is that the optical and mechanical optimization are often constrained to each other. One promising platform is based on the optomechanical crystal cavity, where both waves are confined by bandgaps in two-dimensional periodic structures. So far, however, only a single microcavity design has been demonstrated that can simultaneously confine optical and mechanical modes [17]. These devices were fabricated using the traditional approach of a direct write * gustavo@ifi.unicamp.br † alegre@ifi.unicamp.br; http://nanophoton.ifi.unicamp.br electron beam lithography. However, for massive fundamental studies and applications is desirable to migrate the fabrication process of these devices to commercial CMOS-compatible facilities, where the ...

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“…Radial Bragg Lasers (RBLs) belong to a unique class of circular resonator, which utilizes Bragg reflection as the transverse confinement mechanism, thus enabling the realization of high-Q-factor cavities with high mode-discrimination, while maintaining a wide control over the modal field profile and the device dimensions. Circular Bragg cavities and RBLs have been studied extensively by various groups [3][4][5][6][7][8][9][10][11][12][13], and a variety of RBL-based applications such as high-power semiconductor lasers, surfaceemitting lasers, rotation and bio-chemical sensors, etc. have been suggested and studied.…”

mentioning

confidence: 99%

Optimal design of radial Bragg cavities and lasers

Ben-Bassat

Scheuer

2015

Opt. Lett.

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We present a new and optimal design approach for obtaining maximal confinement of the field in radial Bragg cavities and lasers for TM polarization. The presented approach outperforms substantially the previously employed periodic and semi-periodic design schemes of such lasers. We show that in order to obtain maximal confinement, it is essential to consider the complete reflection properties (amplitude and phase) of the propagating radial waves at the interfaces between Bragg layers. When these properties are taken into account, we find that it is necessary to introduce a wider ("half-wavelength") layer at a specific radius in the "quarter-wavelength" radial Bragg stack. It is shown that this radius corresponds to the cylindrical equivalent of Brewster's angle. The confinement and field profile are calculated numerically by means of transfer matrix method.

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Circular Grating Resonators as Small Mode-Volume Microcavities for Switching

Cited by 18 publications

References 31 publications

Numerical investigation of optical resonances in circular grating resonators

Numerical investigation of optical resonances in circular grating resonators

Hybrid confinement of optical and mechanical modes in a bullseye optomechanical resonator

Optimal design of radial Bragg cavities and lasers

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