28 January 2005 Nonlinear electrical transport in quantum wells under intense radiation
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The quantum transport equation for electrons under intense radiation was solved. The frequency-dependent electrical current driven directly by the radiation field is obtained. The electrical field of the laser radiation is included exactly and the electron-impurity interaction is included up to the second order. Our formalism rests on the solution of density matrix for successive order of photon processes. It is found that as radiation intensity increases, the rate of multiphoton absorption and emission can exceed that of single photon processes. In the strong electron-photon coupling limit, rate of emission is comparable to that of absorption.
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Chao Zhang, Chao Zhang, "Nonlinear electrical transport in quantum wells under intense radiation", Proc. SPIE 5646, Nonlinear Optical Phenomena and Applications, (28 January 2005); doi: 10.1117/12.572434; https://doi.org/10.1117/12.572434

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