Surface guided waves in two-dimensional phononic crystals

Tanaka, Yukihiro; Yano, Takafumi; Tamura, Shin–ichiro

doi:10.1016/j.wavemoti.2007.02.009

Cited by 52 publications

(58 citation statements)

References 22 publications

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“…Acoustic energy is easily transmitted in and out of the waveguides, as previously noted in numerical calculations [48]. The strong frequency dependencies of the transmission and reflection coefficients arise from the periodicity of the surrounding phononic-crystal medium.…”

Section: Phononic-crystal Waveguidessupporting

confidence: 51%

Watching surface waves in phononic crystals

Wright

Matsuda

2015

Phil. Trans. R. Soc. A.

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In this paper, we review results obtained by ultrafast imaging of gigahertz surface acoustic waves in surface phononic crystals with one-and two-dimensional periodicities. By use of quasi-point-source optical excitation, we show how, from a series of images that form a movie of the travelling waves, the dispersion relation of the acoustic modes, their corresponding mode patterns and the position and widths of phonon stop bands can be obtained by temporal and spatiotemporal Fourier analysis. We further demonstrate how one can follow the temporal evolution of phononic eigenstates in k-space using data from phononic-crystal waveguides as an example.

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Section: Phononic-crystal Waveguidessupporting

confidence: 51%

Watching surface waves in phononic crystals

Wright

Matsuda

2015

Phil. Trans. R. Soc. A.

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“…Full energy gaps have been obtained thanks to a high acoustic contrast between the materials, 7 rotation of the elasticity tensors of the cylinders, 5,6 taking into account piezoelectric properties [8][9][10] or by making use of local resonance effect. 1,[12][13][14] The most often used simulation a Electronic mail: graczyk@amu.edu.pl methods are that of finite elements, that of finite differences 2,15 and that of plane waves. 11,15 The results obtained by computation have been verified by experiments.…”

Section: Introductionmentioning

confidence: 99%

Simulations of acoustic waves bandgaps in a surface of silicon with a periodic hole structure in a thin nickel film

Graczyk

Mróz

2014

AIP Advances

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We have performed simulations of dispersion relations for surface acoustic waves in two-dimensional phononic crystal by the finite elements method (FEM) and by the plane wave method (PWM). Considered medium is a thin nickel layer on a silicon single crystal (001) surface. The nickel film is decorated with cylindrical holes of the depth equal to the nickel film thickness arranged in a square lattice. We have obtained full bandgaps for the surface waves propagating in the medium of particular range of filling factor and layer thickness. The width of the bandgap had reached over 500[MHz] for the sample of the lattice constant 500[nm] and is sufficient for experimental design.

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“…The existence of complete elastic/acoustic BG, the possibilities of real applications such as elastic/acoustic filters [16], or even as noise control devices [17,18], improvements in the design of transducers [19,20], or testing fundamental pure physics phenomena [21][22][23][24][25][26][27][28][29][30][31] are several examples that motivated this growing interest.…”

Section: Introductionmentioning

confidence: 99%