Diamond-based surface acoustic wave devices

Nakahata, H.; Fujii, Satoshi; Higaki, K.; Hachigo, A.; Kitabayashi, H.; Shikata, Shinichi; Fujimori, Naoji

doi:10.1088/0268-1242/18/3/314

Cited by 61 publications

(40 citation statements)

References 20 publications

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“…A well-established technique for the generation and detection of SAWs is to pattern interdigital transducers (IDTs) on a piezoelectric substrate. Highfrequency SAW devices have previously been fabricated on diamond [50]. For the samples used in our experiments, (a) Schematic of a Λ-type three-level system driven by two optical fields with respective Rabi frequency, Ω 1 and Ω 2 .…”

Section: A Generation Of Surface Acoustic Wavesmentioning

confidence: 99%

Coupling a Surface Acoustic Wave to an Electron Spin in Diamond via a Dark State

et al. 2016

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The emerging field of quantum acoustics explores interactions between acoustic waves and artificial atoms and their applications in quantum information processing. In this experimental study, we demonstrate the coupling between a surface acoustic wave (SAW) and an electron spin in diamond by taking advantage of the strong strain coupling of the excited states of a nitrogen vacancy center while avoiding the short lifetime of these states. The SAW-spin coupling takes place through a Λ-type three-level system where two ground spin states couple to a common excited state through a phonon-assisted as well as a direct dipole optical transition. Both coherent population trapping and optically driven spin transitions have been realized. The coherent population trapping demonstrates the coupling between a SAW and an electron spin coherence through a dark state. The optically driven spin transitions, which resemble the sideband transitions in a trapped-ion system, can enable the quantum control of both spin and mechanical degrees of freedom and potentially a trapped-ion-like solid-state system for applications in quantum computing. These results establish an experimental platform for spin-based quantum acoustics, bridging the gap between spintronics and quantum acoustics.

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Section: A Generation Of Surface Acoustic Wavesmentioning

confidence: 99%

Coupling a Surface Acoustic Wave to an Electron Spin in Diamond via a Dark State

et al. 2016

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“…To excite a SAW, an oscillating voltage of frequency f SAW is applied to an interdigital transducer 3 (IDT) whose spacing determines the wavelength λ 0 , such that f SAW λ 0 = v SAW . The SAW velocity v SAW is in the range 1 − 7 km/s for commonly used single-crystal materials 1 but can reach 12 km/s for layered systems 4,5 . The IDT also works as a receiver, generating an oscillating voltage when a SAW of the right wavelength passes through it 1 .…”

Section: Introductionmentioning

confidence: 99%

“…We cool the devices down to a lowest temperature of 10 mK using a dilution refrigerator, and measure their frequency response using a vector network analyzer (VNA). We also perform two-contact electrical resistance measurements as a function of temperature on samples cut from the same ZnO wafer, using graphite paste for contacts, and a liquid 4 He dewar dipstick fitted with a Cernox thermometer.…”

Section: Introductionmentioning

confidence: 99%

Surface acoustic wave devices on bulk ZnO crystals at low temperature

Magnusson

Williams

Manenti

et al. 2015

Applied Physics Letters

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Surface acoustic wave (SAW) devices based on thin films of ZnO are a well established technology. However, SAW devices on bulk ZnO crystals are not practical at room temperature due to the significant damping caused by finite electrical conductivity of the crystal. Here, by operating at low temperatures, we demonstrate effective SAW devices on the (0001) surface of bulk ZnO crystals, including a delay line operating at SAW wavelengths of λ = 4 and 6 µm and a one-port resonator at a wavelength of λ = 1.6 µm. We find that the SAW velocity is temperature dependent, reaching v ≃ 2.68 km/s at 10 mK. Our resonator reaches a maximum quality factor of Q i ≃ 1.5 × 10 5 , demonstrating that bulk ZnO is highly viable for low temperature SAW applications. The performance of the devices is strongly correlated with the bulk conductivity, which quenches SAW transmission above about 200 K.

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“…Several methods have been proposed to overcome this problem [19]. Mechanical polishing of the diamond surface has been used for microcrystalline diamond (MCD) in order to solve it [20,21 ]. However, this procedure is expensive, time-consuming and not yet optimized for NCD.…”

Section: Introductionmentioning

confidence: 99%

High precision pressure sensors based on SAW devices in the GHz range

Rodríguez-Madrid

Iriarte

Williams

et al. 2013

Sensors and Actuators A: Physical

100

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In this paper, an AIN/free-standing nanocrystalline diamond (NCD) system is proposed in order to process high frequency surface acoustic wave (SAW) resonators for sensing applications. The main problem of synthetic diamond is its high surface roughness that worsens the sputtered AIN quality and hence the device response. In order to study the feasibility of this structure, AIN films from 150 nm up to 1200 nm thick have been deposited on free-standing NCD. We have then analysed the influence of the AIN layer thickness on its crystal quality and device response. Optimized thin films of 300 nm have been used to fabricate of one-port SAW resonators operating in the 10-14 GHz frequency range. A SAW based sensor pressure with a sensibility of 0.33 MHz/bar has been fabricated.

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Diamond-based surface acoustic wave devices

Cited by 61 publications

References 20 publications

Coupling a Surface Acoustic Wave to an Electron Spin in Diamond via a Dark State

Coupling a Surface Acoustic Wave to an Electron Spin in Diamond via a Dark State

Surface acoustic wave devices on bulk ZnO crystals at low temperature

High precision pressure sensors based on SAW devices in the GHz range

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