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Many-Body Spin Correlations in Nonlinear Optical Spectroscopy.
- Source :
- Journal of Superconductivity; Apr2001, Vol. 14 Issue 2, p211-215, 5p
- Publication Year :
- 2001
-
Abstract
- We study the role of spin correlations in nonlinear absorption due to optical transitions from a deep impurity level to states above a Fermi sea. We demonstrate that the Hubbard repulsion between two electrons occupying the impurity state leads to a logarithmic divergence of the third-order nonlinear optical susceptibility χ<superscript>(3)</superscript> at the absorption threshold. This divergence is a manifestation of the Kondo physics in the nonlinear optical response of Fermi sea systems. Remarkably, the light-induced Kondo temperature, which governs the shape of the Kondo-absorption spectrum, can be tuned by varying the intensity and frequency of the pump optical field. We also show that, for off-resonant pump excitation, the pump–probe spectrum exhibits a narrow peak below the linear absorption onset. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08961107
- Volume :
- 14
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of Superconductivity
- Publication Type :
- Academic Journal
- Accession number :
- 49519337
- Full Text :
- https://doi.org/10.1023/A:1007812002290