中国物理B ›› 1992, Vol. 1 ›› Issue (1): 63-68.doi: 10.1088/1004-423X/1/1/008

• • 上一篇    

DYNAMICS OF CARRIER CAPTURE IN AlGaAs/GaAs MULTIPLE QUANTUM WELLS

莫党1, 林位株2, 彭文基2, 丘志仁2, 周学聪2   

  1. (1)Department of Physics, Zhongshan University, Guangzhou 510275, China; (2)Institute of Laser and Spectroscopy, Zhongshan University, Guangzhou 510275, China
  • 收稿日期:1991-08-16 出版日期:1992-01-20 发布日期:1992-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China.

DYNAMICS OF CARRIER CAPTURE IN AlGaAs/GaAs MULTIPLE QUANTUM WELLS

LIN WEI-ZHU (林位株)a, PENG WEN-JI (彭文基)a, QIU ZHI-REN (丘志仁)a, ZHOU XUE-CONG (周学聪)a, MO DANG (莫党)b   

  1. a Institute of Laser and Spectroscopy, Zhongshan University, Guangzhou 510275, China; b Department of Physics, Zhongshan University, Guangzhou 510275, China
  • Received:1991-08-16 Online:1992-01-20 Published:1992-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China.

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摘要： Dynamics of carrier relaxation and capture in AlGaAs/GaAs multiple quantum wells (MQW) at 80 K is studied using picosecond luminescence and femtosecond absorption saturation measurements. Carriers generated in the wells and in the barriers scatter initially out of the excited states to a quasi-equilibrium state in 35 and 400 femtoseconds, respectively, before they are captured into the bound states of the quantum wells. Carrier capture occurs during carrier cooling and recombination. A carrier capture time of 25 ps has been deduced from time-resolved luminescence.

Abstract: Dynamics of carrier relaxation and capture in AlGaAs/GaAs multiple quantum wells (MQW) at 80 K is studied using picosecond luminescence and femtosecond absorption saturation measurements. Carriers generated in the wells and in the barriers scatter initially out of the excited states to a quasi-equilibrium state in 35 and 400 femtoseconds, respectively, before they are captured into the bound states of the quantum wells. Carrier capture occurs during carrier cooling and recombination. A carrier capture time of 25 ps has been deduced from time-resolved luminescence.

中图分类号:  (Quantum wells)

  • 73.63.Hs
72.20.Jv (Charge carriers: generation, recombination, lifetime, and trapping) 78.67.De (Quantum wells) 78.55.Cr (III-V semiconductors) 78.47.-p (Spectroscopy of solid state dynamics)