Chin. Phys. Lett.  2001, Vol. 18 Issue (7): 979-981    DOI:
Original Articles |
Coherent Phonon Detection in Ge with a Femtosecond Laser
PAN Xin-Yu;WANG Shu-Feng;HUANG Wen-Tao;YANG Hong;LI Xia;JIANG Hong-Bing;GONG Qi-Huang
State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871
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PAN Xin-Yu, WANG Shu-Feng, HUANG Wen-Tao et al  2001 Chin. Phys. Lett. 18 979-981
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Abstract A highly sensitive femtosecond photodeflection spectroscopy technique was first developed experimentally. Using femtosecond laser pulses we have detected ultrafast coherent phonon emission in a Ge plate. It is found that the ultrafast femtosecond laser pulses generate coherent phonons in the plate via the electronic mechanism. Supersonic expansion of photoexcited electron-hole plasma is observed.
Keywords: 78.47.+p      42.65.Re      43.35.Sx      63.20.-e     
Published: 01 July 2001
PACS:  78.47.+p  
  42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)  
  43.35.Sx (Acoustooptical effects, optoacoustics, acoustical visualization, Acoustical microscopy, and acoustical holography)  
  63.20.-e (Phonons in crystal lattices)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2001/V18/I7/0979
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PAN Xin-Yu
WANG Shu-Feng
HUANG Wen-Tao
YANG Hong
LI Xia
JIANG Hong-Bing
GONG Qi-Huang
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