Acoustic phonon pulse generation and detection in GaAs/Al0.3Ga0.7As quantumwells
暂无分享，去创建一个
Acoustic phonon pulse generation and detection are investigated in a sample with three embedded GaAs/AlGaAs quantum wells by an ultrafast optical pump and probe technique at the temperatures 20 K and 300 K. Scanning the pump photon energies around the hh1-e1 resonances we find a strong variation of the transient reflectance and phase changes. These changes are compared with a numerical simulation based on probe light scattering due to the inhomogeneous photoelastic effect. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
[1] H. Maris,et al. Attenuation and velocity of 56 GHz longitudinal phonons in gallium arsenide from 50 to 300 K , 1994 .
[2] O. Wright,et al. Detection of ultrafast phenomena by use of a modified Sagnac interferometer. , 1999, Optics letters.
[3] Jeremy J. Baumberg,et al. Ultrafast Acoustic Phonon Ballistics in Semiconductor Heterostructures , 1997 .
[4] Osamu Matsuda,et al. Reflection and transmission of light in multilayers perturbed by picosecond strain pulse propagation , 2002 .