Coherent phonon detection in Ge with a femtosecond laser

Authors
Pan, XY Wang, SF Huang, WT Yang, H Li, X Jiang, HB Gong, QH
Citation
Xy. Pan et al., Coherent phonon detection in Ge with a femtosecond laser, CHIN PHYS L, 18(7), 2001, pp. 979-981
Citations number
9
Categorie Soggetti
Physics
Journal title
CHINESE PHYSICS LETTERS
ISSN journal
0256307X → ACNP
Volume
18
Issue
7
Year of publication
2001
Pages
979 - 981
Database
ISI
SICI code
0256-307X(200107)18:7<979:CPDIGW>2.0.ZU;2-V
Abstract
A highly sensitive femtosecond photodeflection spectroscopy technique was f irst developed experimentally. Using femtosecond laser pulses we have detec ted ultrafast coherent phonon emission in a Ge plate. It is found that the ultrafast femtosecond laser pulses generate coherent phonons in the plate v ia the electronic mechanism. Supersonic expansion of photo-excited electron -hole plasma is observed.