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Coherent hypersonic closed-pipe organ like modes in supported polymer films
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10.1063/1.3605567
/content/aip/journal/apl/99/2/10.1063/1.3605567
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/2/10.1063/1.3605567
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Temporal profiles of the reflectivity signals measured in PSPBPS and PS films with thickness values of 105 nm and 95 nm, respectively. The wavelength λ of the probing light is indicated above the curves. The inset shows the experimental scheme. (b) Amplitude spectra obtained from the signals shown in (a) by fast Fourier transforms. The vertical bars indicate thefrequencies of the closed-pipe organ like modes calculated using Eq. (1). The order of the modes, n, are indicated near the corresponding bars.

Image of FIG. 2.
FIG. 2.

(Color online) Amplitude spectra obtained from the temporal profiles measured in PSPBPS films with various thickness by probing with λ = 400 nm. The solid vertical bars indicate the frequencies of the closed-pipe organ like modes calculated using Eq. (1). The thickness of the films and sound velocity used in calculations are given in the square frames near each curve. The vertical dashed bar (fB ) indicates the frequency of Brillouin oscillations expected in the bulk material.

Image of FIG. 3.
FIG. 3.

(Color online) Frequency dependence of the bulk decay rate of the closed-pipe organ like modes in PSPBPS and PS films, after correction for the finite leakage through the polymer/Si interface. The solid line shows the linear frequency dependence of the decay rate due to attenuation in the polymer film and is compared with the data for PS from Ref. 22.

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/content/aip/journal/apl/99/2/10.1063/1.3605567
2011-07-15
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Coherent hypersonic closed-pipe organ like modes in supported polymer films
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/2/10.1063/1.3605567
10.1063/1.3605567
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