Abstract：
:The properties of optical to acoustic transduction of semiconductor superlattices have been explored for several years in the sub terahertz frequency range. Using femtosecond laser pulses focused on these structures, acoustic modes are excited with a frequency related to the periodicity of the structure stacking. We have shown that these acoustic waves can be extracted and can propagate in the underlying substrate. We study superlattices ability to be quasi monochromatic generators. On the other hand, superlattices have been found to be very sensitive and selective detectors. We present a set of experimental results concerning the generation, propagation over large distances and detection of acoustic waves at high frequencies, up to the challenging 1 THz by picosecond ultrasonics experiments in transmission geometry.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Huynh A,Perrin B,Lemaître Adoi
10.1016/j.ultras.2014.07.009subject
Has Abstractpub_date
2015-02-01 00:00:00pages
66-79eissn
0041-624Xissn
1874-9968pii
S0041-624X(14)00200-5journal_volume
56pub_type
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