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Ultrafast Relaxation of Coherent Control Photocurrent in AlGaAs/GaAs Multi Quantum Wells |
| LIN Wei-Zhu;SHOU Qian;LIU Lu-Ning;WU Yu,WEN Jin-Hui;LAI Tian-Shu |
| State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275 |
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| Cite this article: |
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LIN Wei-Zhu, SHOU Qian, LIU Lu-Ning et al 2005 Chin. Phys. Lett. 22 188-190 |
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Abstract We theoretically and experimentally study the ultrafast dynamics of coherent control photocurrent in AsGaAs/GaAs multi quantum wells at room temperature. A ballistic photocurrent relaxation time of ～200fs is deduced based on the theory of density matrix and is evidenced with the three-colour femtosecond pump--probe measurements.
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| Keywords:
72.15.Lh
78.67.De
42.50.Md
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Published: 01 January 2005
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| PACS: |
72.15.Lh
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(Relaxation times and mean free paths)
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78.67.De
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(Quantum wells)
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42.50.Md
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(Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)
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