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Ultrafast optical generation and remote detection of terahertz sound using semiconductor superlattices
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10.1063/1.2754353
/content/aip/journal/apl/91/2/10.1063/1.2754353
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/2/10.1063/1.2754353
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Schematic diagram of the double SL structure and the geometry of the pump-probe experiments. The samples consist of a thick GaAs layer of 1.2 or between two identical SLs.

Image of FIG. 2.
FIG. 2.

Time-domain data for samples and . Pump pulses generate sound waves on the front superlattice, that are later detected on the front (a) and the back side (b) of the sample. Trace (a) and the inset of (b), obtained on sample , show folded phonon oscillations superimposed on the larger, low frequency oscillations associated with stimulated Brillouin scattering.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Fourier transform of the time trace for sample A. We observe three peaks that correspond to the backscattering (BS) and forward scattering (FS) modes accessible in Raman experiments; (b) calculated spectrum for the double SL structure, where the probe is incident on the second SL and (c) calculated spectrum for a semi-infinite structure showing the BS doublet. The lower panel shows the dispersion relation for an infinite SL.

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/content/aip/journal/apl/91/2/10.1063/1.2754353
2007-07-12
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ultrafast optical generation and remote detection of terahertz sound using semiconductor superlattices
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/2/10.1063/1.2754353
10.1063/1.2754353
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