| Original Articles |
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Coherent Phonon Detection in Ge with a Femtosecond Laser
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| 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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| Cite this article: |
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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.
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| Keywords:
78.47.+p
42.65.Re
43.35.Sx
63.20.-e
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Published: 01 July 2001
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| PACS: |
78.47.+p
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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43.35.Sx
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(Acoustooptical effects, optoacoustics, acoustical visualization, Acoustical microscopy, and acoustical holography)
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63.20.-e
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(Phonons in crystal lattices)
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