Dynamics of Photo-excited Spins in InSb Based Quantum Wells

K. Nontapot; R. N. Kini; B. Spencer; G. A. Khodaparast; N. Goel; S. J. Chung; T. D. Mishima; M. B. Santos

Dynamics of Photo-excited Spins in InSb Based Quantum Wells

Materials Science 2012-07-30 v1

Authors: K. Nontapot , R. N. Kini , B. Spencer , G. A. Khodaparast , N. Goel , S. J. Chung , T. D. Mishima , M. B. Santos

View on arXiv ↗ PDF ↗

Abstract

We report time resolved measurements of spin relaxation in doped and undoped InSb quantum wells using degenerate and two-color magneto-optical Kerr effect techniques. We observed that the photo-excited spin dynamics are strongly influenced by laser excitation fluence and the doping profile of the samples. In the low fluence regime, an oscillatory pattern was observed at low temperatures ( $\leq$ 77 K) in the samples with an asymmetric doping profile which might be attributed to the quasi-collision-free spin relaxation regime. Our measurements also suggest the influence of the barrier materials (Al $_{x}$ In $_{1-x}$ Sb) on the spin relaxation in these material systems.

Keywords

spin relaxation quantum dot excitons spin physics in semiconductors

Cite

@article{arxiv.0807.2660,
  title  = {Dynamics of Photo-excited Spins in InSb Based Quantum Wells},
  author = {K. Nontapot and R. N. Kini and B. Spencer and G. A. Khodaparast and N. Goel and S. J. Chung and T. D. Mishima and M. B. Santos},
  journal= {arXiv preprint arXiv:0807.2660},
  year   = {2012}
}

Dynamics of Photo-excited Spins in InSb Based Quantum Wells

Abstract

Keywords

Cite

Related papers