Effective mass anisotropy of hot electrons in nonparabolic conduction bands of n-doped InGaAs films using ultrafast terahertz pump-probe techniques.

@article{Blanchard2011EffectiveMA,
  title={Effective mass anisotropy of hot electrons in nonparabolic conduction bands of n-doped InGaAs films using ultrafast terahertz pump-probe techniques.},
  author={Frederick Blanchard and Dw Golde and Fu Hai Su and Luca Razzari and Gulshan Sharma and Roberto Morandotti and Tsuneyuki Ozaki and Matthew Reid and Masaharu Kira and Stephan W. Koch and Frank A. Hegmann},
  journal={Physical review letters},
  year={2011},
  volume={107 10},
  pages={
          107401
        }
}
The anisotropic effective mass of energetic electrons in an isotropic, nonparabolic conduction band is revealed using ultrafast THz-pump-THz-probe techniques in a n-doped InGaAs semiconductor thin film. A microscopic theory is applied to identify the origin of the observed anisotropy and to show that the self-consistent light-matter coupling contributes significantly to the THz response. 

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