Carrier dynamics of intrinsic CdTe by pump-probe reflection spectroscopy

被引：0
|
作者：
Jin, Zuanming [1 ]
Ma, Hong [1 ]
Li, Dong [1 ]
Ma, Guohong [1 ]
机构：
[1] Department of Physics, College of Science, Shanghai University
来源：
Guangxue Xuebao/Acta Optica Sinica | 2009年 / 29卷 / 08期
关键词：
Carrier dynamics; Intrinsic CdTe; Pump-probe; Ultrafast optics;
D O I：
10.3788/AOS20092908.2343
中图分类号：
学科分类号：
摘要：
The transient carrier dynamics of intrinsic CdTe was investigated by time-resolved femtosecond pump-probe reflection spectroscopy method (PPR) at different wavelengths and powers. The experimental results show that the percentage of the rapid process in carrier relaxation process grows with the increase of the pumped photon energy. The rapid process constant and reflectivity increase when the pumped optical power increases. The model of ultrafast carrier dynamics in intrinsic semiconductor was developed, and the effects of carrier initial scattering, carrier-LO phonon interaction and carrier trapping on carrier relaxation properties were analyzed. The curve of the PPR at the photon energy of 1.49 eV (-20 mV more than the band gap of CdTe) is measured, the fast time constant and the slow one are 2.8 ps and 158.3 ps respectively.
引用
收藏
页码：2343 / 2346
页数：3
相关论文
共 15 条
  • [1] Rulliere C., Femtosecond Laser Pulses Principles and Experiments (2nd Edition), pp. 223-280, (2007)
  • [2] Shah J., Ultrafast Spectroscopy of Semiconductors and Semiconductor Nanostructures, pp. 135-160, (1999)
  • [3] Schall M., Jepsen P.U., Above-band gap two-photon absorption and its influence on ultrafast carrier dynamics in ZnTe and CdTe, Appl. Phys. Lett., 80, 25, pp. 4771-4773, (2002)
  • [4] Padilha L.A., Fu J., Hagan D., Et al., Two-photon absorption in CdTe quantum dots, Optics Express, 13, 17, pp. 6460-6467, (2005)
  • [5] Tatsuura S., Matsubara T., Misu H., Et al., Cadmium telluride bulk crystal as an ultrafast nonlinear optical switch, Appl. Phys. Lett., 87, 25, (2005)
  • [6] Kimel A.V., Pavlov V.V., Pisarev R.V., Et al., Ultrafast dynamics of photo-induced magneto-optical Kerr effect in CdTe at Room-temperature, Phys. Rev. B, 62, 16, (2000)
  • [7] Nahalkova P., Spin dynamics in bulk CdTe at room temperature, Materials Science and Engineering B, 126, pp. 143-147, (2006)
  • [8] Li D., Yang H.-Q., Liang C., Et al., Transient dynamics of excited states and nonlinear optical properties of inP nanoparticle, Spectroscopy and Spectral Analysis, 26, 9, (2006)
  • [9] Liu G., Wang G., Fu B., Et al., Ultrafast pump-probe reflectivity study of carrier dynamics in silicon surface, Chinese J. Lasers, 35, 9, pp. 6631-9631, (2008)
  • [10] Ma H., Ma G., Wang W., Et al., Size-dependent optical properties and carriers dynamics in CdSe/ZnS quantum dots, Chinese Physics B, 17, 4, pp. 1280-1286, (2008)
12