Unlu, S.Karabulut, I.Safak, H.2020-03-262020-03-2620061386-94771873-1759https://dx.doi.org/10.1016/j.physe.2006.03.163https://hdl.handle.net/20.500.12395/20567In this work, both the intersubband optical absorption coefficients and the refractive index changes are calculated exactly in a quantum box. Analytical expressions for the linear and nonlinear intersubband absorption coefficients and refractive index changes are obtained by using the compact-density matrix approach. Numerical results are presented for typical GaAs/AlxGa1-xAs quantum box system. The linear, third-order nonlinear and total absorption and refractive index changes are investigated as a function of the incident optical intensity and structure parameters such as box-edge length and stoichiometric ratio. Our results show that both the incident optical intensity and the structure parameters have a great effect on the total absorption and refractive index changes. (c) 2006 Elsevier B.V. All rights reserved.en10.1016/j.physe.2006.03.163info:eu-repo/semantics/closedAccessquantum boxintersubband transitionsnonlinear optical propertiesLinear and nonlinear intersubband optical absorption coefficients and refractive index changes in a quantum box with finite confining potentialArticle332319324Q2WOS:000239270300004Q3