First-order reflection coefficient of surface acoustic waves from thin-strip overlays

Datta, Supriyo; Hunsinger, B.J.

doi:10.1063/1.326742

Cited by 98 publications

(16 citation statements)

References 2 publications

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“…The resulting variation of the wave velocity, in particular, is an aspect of practical interest for SAW device applications and has been investigated by many authors [9,16,17].…”

Section: Saw Velocity Shift and Dampingmentioning

confidence: 99%

Thermomechanical behavior of surface acoustic waves in ordered arrays of nanodisks studied by near-infrared pump-probe diffraction experiments

et al. 2007

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The ultrafast thermal and mechanical dynamics of a two-dimensional lattice of metallic nanodisks has been studied by near infrared pump-probe diffraction measurements, over a temporal range spanning from 100 fs to several nanoseconds. The experiments demonstrate that, in these systems, a two-dimensional surface acoustic wave (2DSAW), with a wavevector given by the reciprocal periodicity of the array, can be excited by ∼120 fs Ti:sapphire laser pulses. In order to clarify the interaction between the nanodisks and the substrate, numerical calculations of the elastic eigenmodes and simulations of the thermodynamics of the system are developed through finite-element analysis. At this light, we unambiguously show that the observed 2DSAW velocity shift originates from the mechanical interaction between the 2DSAWs and the nano-disks, while the correlated 2DSAW damping is due to the energy radiation into the substrate.

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“…The resulting variation of the wave velocity, in particular, is an aspect of practical interest for SAW device applications and has been investigated by many authors [9,16,17].…”

Section: Saw Velocity Shift and Dampingmentioning

confidence: 99%

Thermomechanical behavior of surface acoustic waves in ordered arrays of nanodisks studied by near-infrared pump-probe diffraction experiments

et al. 2007

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“…A more realistic estimation can be obtained using the model outlined in Ref. 9. Using particle velocities v x = 2.15 m / s and v z = 3.35 m / s (keeping the coordinate notation defined in Fig.…”

Section: B Spatial Distribution Of the Saw Fieldsmentioning

confidence: 99%

“…1(b)] follows the first of these approaches, where the acoustic mismatch is reduced by embedding the fingers into the substrate. 7 The reflection of surface waves due to the presence of metallic stripes has been described using simple models based on the elastic properties 9 and on the charge distribution in the metallic stripe. 10 In the following section, we present calculations of the dispersion relation for surface elastic modes in conventional and in embedded-finger SF IDTs performed by taking advantage of the periodicity of the fingers.…”

Section: A Reflection Coefficientmentioning

confidence: 99%

Embedded interdigital transducers for high-frequency surface acoustic waves on GaAs

Lima

Seidel

Kostial

et al. 2004

Journal of Applied Physics

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We investigate high-performance, high-frequency interdigital transducers (IDTs) for the generation of surface acoustic waves (SAWs) on GaAs substrates, where the metal fingers are embedded in the substrate. We demonstrate that the acoustic reflections and the scattering of the surface modes into the substrate become considerably reduced in these transducers, leading to an increased output power. The finger embedding process is particularly relevant for the generation of powerful beams of high-frequency SAWs on weak piezoelectric substrates (such as most of the semiconducting materials) using long IDTs. We also show that the reflection reduction is important for the design of focusing single-finger IDTs, since it minimizes the effects of the finger grating on the angular dependence of the phase velocity.

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“…2 However, few studies have considered the possibility of using wetting liquids on surfaces. When a surface wave impinges on a wetting liquid the wave may be transmitted as either a leaky surface acoustic wave or a pseudo-Stoneley wave, or it may be reflected.…”

mentioning

confidence: 99%

Reflection of surface acoustic waves by localized wetting liquids

Newton

McHale

Banerjee

1997

Applied Physics Letters

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First-order reflection coefficient of surface acoustic waves from thin-strip overlays

Cited by 98 publications

References 2 publications

Thermomechanical behavior of surface acoustic waves in ordered arrays of nanodisks studied by near-infrared pump-probe diffraction experiments

Thermomechanical behavior of surface acoustic waves in ordered arrays of nanodisks studied by near-infrared pump-probe diffraction experiments

Embedded interdigital transducers for high-frequency surface acoustic waves on GaAs

Reflection of surface acoustic waves by localized wetting liquids

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