Observation of Large Kerr Nonlinearity at Low Light Intensities
2003; American Physical Society; Volume: 91; Issue: 9 Linguagem: Inglês
10.1103/physrevlett.91.093601
ISSN1092-0145
Autores Tópico(s)Cold Atom Physics and Bose-Einstein Condensates
ResumoWe report an experimental observation of large Kerr nonlinearity with vanishing linear susceptibilities in coherently prepared four-level rubidium atoms. Quantum coherence and interference manifested by electromagnetically induced transparency suppress the linear susceptibilities and greatly enhance the nonlinear susceptibilities at low light intensities. The measured Kerr nonlinearity is comparable in magnitude to the linear dispersion in a simple two-level system and is several orders of magnitude greater than the Kerr nonlinearity of a conventional three-level scheme under similar conditions.
Referência(s)