Optimized optical generation and detection of superlattice acoustic phonons

Applied Physics Letters

Volumn 94, Issue 10, 2009, Pages

  Winter, M F Pascual ^a,b   Fainstein, A ^a   Jusserand, B ^b   Perrin, B ^b   Lematre A ^b  

^a INSTITUTO BALSEIRO   (Argentina)

^b CNRS   (France)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTICS; ELECTROMAGNETIC WAVE EMISSION;

ACOUSTIC PHONONS; DETECTION PROCESS; FEMTOSECOND PUMPS; FINE TUNING; GAAS; GAAS/ALAS SUPERLATTICES; INTERMEDIATE LAYERS; LONG DISTANCES; NANO STRUCTURES; OPTICAL GENERATIONS; PHONON PROPAGATION; SPECTRAL RESPONSE; TERAHERTZ; THICKNESS GRADIENTS; TIME- DELAYS; TRAVEL TIME;

PHONONS;

EID: 62549124583     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3097244     Document Type: Article

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15. The calculated spectra were obtained using Eqs. (1) and (2) of Ref. together with the continuum model for the eigenmodes of the sample. The enhancement factor is defined as in the experiment, i.e. the ratio between the maximum peak intensity and the average of the generation peak intensity over the other seven detuning conditions. In the case of full optical decoupling, the generation (photoelastic) constant in the probe (pump) SL was taken as 0.
16. As the pump and probe electric fields enter Eqs. (1) and (2) of Ref. in a quadratic form, the effects (i)-(iv) appear as independent terms in the computed spectra, that can be considered or not for computing theoretical enhancement factors.