Universal Quantum Transducers Based on Surface Acoustic Waves

Schütz, Martin J. A.

doi:10.1007/978-3-319-48559-1_4

Cited by 52 publications

(75 citation statements)

References 92 publications

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“…Reduction of the acoustic loss can be achieved by optimizing the dry etching process for the OM waveguides, as well as exploring new thin film materials such as lithium niobate and single-crystal AlN. Through the reduction of acoustic propagation loss and the enhancement of acoustic coupling, the Brillouin scattering efficiency could approach unity so that the demonstrated Brillouin optomechanical system will find important applications in microwave photonics and quantum transduction [56,57].…”

Section: Resultsmentioning

confidence: 99%

Electromechanical Brillouin scattering in integrated optomechanical waveguides

Liu

2019

Optica

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In the well-known stimulated Brillouin scattering (SBS) process, spontaneous acoustic phonons in materials are stimulated by laser light and scatter the latter into a Stokes sideband. SBS becomes more pronounced in optical fibers and has been harnessed to amplify optical signals and even achieve lasing. Exploitation of SBS has recently surged on integrated photonics platforms as simultaneous confinement of photons and phonons in waveguides leads to drastically enhanced interaction. Instead of being optically stimulated, coherent phonons can also be electromechanically excited with very high efficiency as has been exploited in radiofrequency acoustic filters. Here, we demonstrate electromechanically excited Brillouin scattering in integrated optomechanical waveguides made of piezoelectric material aluminum nitride (AlN). Acoustic phonons of 16 GHz in frequency are excited with nanofabricated electromechanical transducers to scatter counter-propagating photons in the waveguide into a single anti-Stokes sideband. We show that phase-matching conditions of Brillouin scattering can be tuned by varying both the optical wavelength and the acoustic frequency to realize tunable single-sideband modulation. Combining Brillouin scattering photonics with nanoelectromechanical systems, our approach provides an efficient interface between microwave and optical photons that will be important for microwave photonics and potentially quantum transduction.

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Section: Resultsmentioning

confidence: 99%

Electromechanical Brillouin scattering in integrated optomechanical waveguides

Liu

2019

Optica

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“…For many applications [10,11,19], the quality factor divided by mode area Q/Aeff is an important figure of merit; it characterizes the buildup factor of the acoustic field in the cavity. The chosen etch depth of 115 nm (2.8% λ) is a good trade-off between a small mode area and a high Q factor [8,9].…”

Section: Phononic Band Structure Engineeringmentioning

confidence: 99%

Phononic Band Structure Engineering for High- Q Gigahertz Surface Acoustic Wave Resonators on Lithium Niobate

et al. 2019

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Phonons at gigahertz frequencies interact with electrons, photons, and atomic systems in solids, and therefore have extensive applications in signal processing, sensing, and quantum technologies. Surface acoustic wave (SAW) resonators that confine surface phonons can play a crucial role in such integrated phononic systems due to small mode size, low dissipation, and efficient electrical transduction. To date, it has been challenging to achieve high quality (Q) factor and small phonon mode size for SAW resonators at gigahertz frequencies. Here, we present a methodology to design compact high-Q SAW resonators on lithium niobate operating at gigahertz frequencies. We experimentally verify out designs and demonstrate Q factors in excess of 2×10 4 at room temperature (6×10 4 at 4 Kelvin) and mode area as low as 1.87 λ 2 . This is achieved by phononic band structure engineering, which provides high confinement with low mechanical loss. The frequency-Q products (fQ) of our SAW resonators are greater than 10 13 . These high-fQ and small mode size SAW resonators could enable applications in quantum phononics and integrated hybrid systems with phonons, photons, and solid-state qubits.

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“…In general, the strain field could be produced by means of the thin piezoelectric11121314151617 or piezomagnetic5657 film grown on the surface of the diamond layer, where, the piezoelectric or piezomagnetic film behaves as a transducer that transforms the signal between the external electric or magnetic field signal and the lattice vibration. Applying a voltage (magnetic field) across the piezoelectric film (piezomagnetic film), the strain field formed into the DMR.…”

Section: Discussionmentioning

confidence: 99%

Generation of macroscopic Schrödinger cat state in diamond mechanical resonator

Hou

Yang

Chen

et al. 2016

Sci Rep

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We propose a scheme to generate macroscopic Schrödinger cat state (SCS) in diamond mechanical resonator (DMR) via the dynamical strain-mediated coupling mechanism. In our model, the direct coupling between the nitrogen-vacancy (NV) center and lattice strain field enables coherent spin–phonon interactions in the quantum regime. Based on a cyclic Δ-type transition structure of the NV center constructed by combining the quantized mechanical strain field and a pair of external microwave fields, the populations of the different energy levels can be selectively transferred by controlling microwave fields, and the SCS can be created by adjusting the controllable parameters of the system. Furthermore, we demonstrate the nonclassicality of the mechanical SCS both in non-dissipative case and dissipative case. The experimental feasibility and challenge are justified using currently available technology.

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Universal Quantum Transducers Based on Surface Acoustic Waves

Cited by 52 publications

References 92 publications

Electromechanical Brillouin scattering in integrated optomechanical waveguides

Electromechanical Brillouin scattering in integrated optomechanical waveguides

Phononic Band Structure Engineering for High- Q Gigahertz Surface Acoustic Wave Resonators on Lithium Niobate

Generation of macroscopic Schrödinger cat state in diamond mechanical resonator

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