TY - JOUR ID - TI - Nonlinear Susceptibility in Semiconductor hetrostructures AU - Mohsin K. Al-khaykanee محسن الخيكاني PY - 2012 VL - IS - Special SP - 410 EP - 419 JO - Basic Education College Magazine For Educational and Humanities Sciences مجلة كلية التربية الأساسية للعلوم التربوية والإنسانية SN - 23043717 23128003 AB - The linear and non-linear optical properties of three-level systems get a great importance from both theoretical and experimental points of view. This is due to the phenomena related to these systems, like electromagnetic induced transparency (EIT), coherent population trapping (CPT) and coherent adiabatic population (CAP). In contrast to CPT which is a‘‘spectroscopic’’ phenomenon that involves only modifications to the material states in an optically thin sample.

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