Intense laser field effects on the intersubband optical absorption and refractive index change in the delta-doped GaAs quantum wells

Sari H. , Yesilgul U., Ungan F. , Sakiroglu S., Kasapoglu E. , Sokmen I.

CHEMICAL PHYSICS, vol.487, pp.11-15, 2017 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 487
  • Publication Date: 2017
  • Doi Number: 10.1016/j.chemphys.2017.02.004
  • Title of Journal : CHEMICAL PHYSICS
  • Page Numbers: pp.11-15


In this paper, we have investigated the effects of the non-resonant intense laser field on the electronic and optical properties such as linear, nonlinear and the total optical absorption coefficient and refractive index change for transitions between two lower-lying electronic states in the GaAs-based delta-doped quantum well. Within the effective mass approximation, we calculated the eigenvalues and corresponding eigenfunctions as a function of the intense laser parameter by solving the Schrodinger equation in the laser-dressed confinement potential. The analytical expressions of the linear and third-order non-linear optical absorption coefficients and refractive index changes are obtained by using the compact-density matrix formalism. The obtained results show that the separation between ground and first excited energy levels in the delta-doped quantum well decreases in energy by the increase of the laser field intensity and this effect leads to an optical red-shift in the intersubband transitions. This behavior gives us a new degree of freedom in tunability of different device applications based on the optical transitions. (C) 2017 Elsevier B.V. All rights reserved.