Waveguides for surface waves

Oliner, A.A.

doi:10.1007/3-540-08575-0_12

Cited by 15 publications

(11 citation statements)

References 28 publications

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“…[90], together with a transverse mode function restricting the spread in theŷ direction [40,43], we obtain η geo ¼ sin ð2πx R =λÞ − sin ð2πx L =λÞ. It takes on its maximum value η opt when tuning a node of the standing wave at the center between the two dots, that is, x R ¼ l=2, x L ¼ −l=2; this gives η opt ¼ 2 sin ðπl=λÞ, where l is the distance between the two dots [47].…”

Section: Coupling To Saw Phonon Modementioning

confidence: 99%

“…Not only can SAWs be confined in cavities, but they can also be guided in acoustic waveguides [14,43]. Two dominant types of design are (i) topographic WGs, such as ridge-type WGs, where the substrate is locally deformed using etching techniques, and (ii) overlay WGs (such as strip-or slot-type WGs), where one or two strips of one material are deposited on the substrate of another to form core and clad regions with different acoustic velocities.…”

Section: B Saw Waveguidesmentioning

confidence: 99%

“…Finally, κ r arises from leakage through imperfectly reflecting gratings ðjRj < 1Þ; in direct analogy to optical FabryPerot resonators, the associated Q factor is given by Q r ¼ 2πN eff =ð1 − jRj 2 Þ. Assuming negligible diffraction losses (that can be minimized via waveguidelike confinement [14,43]) and cryostat temperatures, the total Q factor is then given by…”

Section: Appendix E: Saw Cavitiesmentioning

confidence: 99%

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Universal Quantum Transducers Based on Surface Acoustic Waves

et al. 2015

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We propose a universal, on-chip quantum transducer based on surface acoustic waves in piezoactive materials. Because of the intrinsic piezoelectric (and/or magnetostrictive) properties of the material, our approach provides a universal platform capable of coherently linking a broad array of qubits, including quantum dots, trapped ions, nitrogen-vacancy centers, or superconducting qubits. The quantized modes of surface acoustic waves lie in the gigahertz range and can be strongly confined close to the surface in phononic cavities and guided in acoustic waveguides. We show that this type of surface acoustic excitation can be utilized efficiently as a quantum bus, serving as an on-chip, mechanical cavity-QED equivalent of microwave photons and enabling long-range coupling of a wide range of qubits.

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Section: Coupling To Saw Phonon Modementioning

confidence: 99%

Section: B Saw Waveguidesmentioning

confidence: 99%

Section: Appendix E: Saw Cavitiesmentioning

confidence: 99%

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Universal Quantum Transducers Based on Surface Acoustic Waves

et al. 2015

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“…Thin film waveguides formed by depositing a strip of a "slow" material on a substrate are well known. 11,22 In our case, the waveguide is formed at the boundary of two films, which makes the analysis more complex. This problem should therefore present an interesting subject for numerical simulations which may also help answer the question of whether a guided boundary mode may exist in the absence of the film thickness nonuniformity.…”

Section: Discussionmentioning

confidence: 99%

Optical generation of surface acoustic waves guided at the linear boundary between two thin films

Maznev

Kelf

Tomoda

et al. 2010

Journal of Applied Physics

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Laser-induced transient grating measurements and ultrafast optical pump-probe imaging of surface acoustic waves near a linear boundary between copper and silica films on a silicon substrate indicate the presence of a boundary-localized mode with a phase velocity slightly below the Rayleigh wave velocity on the copper film. We analyze in detail the dispersion of this localized mode in comparison with that of the Rayleigh waves in the surrounding materials. The existence of the localized mode is ascribed to the nonuniformity of the copper film thickness near its edge resulting from polishing during fabrication.

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“…The WG mode is confined within ϳ4 m of the disk radius, a distance of the order of the acoustic wavelength ⌳ = ͑2a͒ / 26Ϸ 4.5 m. This localization distance also depends on the sound velocities of the materials inside and outside the waveguide. 32 Data for ͉F͑r , l , f͉͒ at r =18 m are shown in Figs. 2͑c͒ and 2͑d͒ for the in-phase and quadrature components, respectively, and are consistent with the results for the y direction.…”

Section: ͑5͒mentioning

confidence: 99%

Acoustic whispering-gallery modes generated and dynamically imaged with ultrashort optical pulses

et al. 2010

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Broadband coherent surface phonon wave packets up to 1 GHz in a microscopic embedded disk are excited and dynamically imaged with ultrashort optical pulses. We isolate a whispering-gallery-like mode using a technique involving quadrature detection of the out-of-plane surface motion on modulating the optical excitation beam. The eigenmode distribution is obtained from spatiotemporal Fourier transforms and a radialazimuthal decomposition demonstrates the selective excitation of a mode with 26-fold rotational symmetry and allows an estimate of the cavity Q factor to be made.

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Waveguides for surface waves

Cited by 15 publications

References 28 publications

Universal Quantum Transducers Based on Surface Acoustic Waves

Universal Quantum Transducers Based on Surface Acoustic Waves

Optical generation of surface acoustic waves guided at the linear boundary between two thin films

Acoustic whispering-gallery modes generated and dynamically imaged with ultrashort optical pulses

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