Enhanced Kerr nonlinearity in a tunnel-coupled double quantum wells

The giant Kerr nonlinearity in an asymmetric coupled quantum well (CQW) driven by probe and control laser fields based on intersubband transitions is investigated. The effect of controlling parameters such as intensity of coupling field and electron tunneling on nonlinear behavior of the system is t...

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Published inPhysica. E, Low-dimensional systems & nanostructures Vol. 44; no. 2; pp. 464 - 469
Main Authors Asadpour, S.H., Hamedi, Hamid Reza, Eslami-Majd, A., Sahrai, Mostafa
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.11.2011
Elsevier
Subjects
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Materials science
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Physics
Quantum wells
Non linear effect
Nanostructured materials
Quantum wells
Tunnel effect
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Summary:The giant Kerr nonlinearity in an asymmetric coupled quantum well (CQW) driven by probe and control laser fields based on intersubband transitions is investigated. The effect of controlling parameters such as intensity of coupling field and electron tunneling on nonlinear behavior of the system is then discussed. It is shown that the enhanced Kerr nonlinearity with reduced linear and nonlinear absorption can be achieved. ► We present the enhancement of Kerr nonlinearity in a four-subband quantum well system. ► The effect of energy splitting on linear and nonlinear absorption is discussed. ► The effect of coupling field on linear and nonlinear susceptibility is investigated.
ISSN:1386-9477
1873-1759
DOI:10.1016/j.physe.2011.09.023