Electron Coherence in Quantum Well Intersubband Transitions

  • A. Imamoğlu
  • H. Schmidt
  • R. J. Ram
  • K. Campman
  • A. Gossard
Chapter
Part of the Fundamental Theories of Physics book series (FTPH, volume 83)

Abstract

Absorption is a fundamental limitation in coherent light generation in both atomic and semiconductor media. In ordinary lasers, the so-called population inversion requirement is a direct consequence of stimulated absorption that accompanies emission. In nonlinear devices such as sum-frequency generators or parametric amplifiers, absorption determines the maximum possible conversion efficiency or parametric gain. Eliminating the stimulated absorption without affecting the emission properties, would remove these basic restrictions and lead to optical devices with novel properties.

Keywords

Population Inversion Gain Coefficient Laser Oscillation Pump Field Parametric Amplifier 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • A. Imamoğlu
    • 1
  • H. Schmidt
    • 1
  • R. J. Ram
    • 1
  • K. Campman
    • 1
  • A. Gossard
    • 1
  1. 1.Department of Electrical and Computer EngineeringUniversity of CaliforniaSanta BarbaraUSA

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