Calculation of the changes in the absorption and refractive index for intersubband optical transitions in a quantum box

• Published in: Physica Status Solidi (b) Vol. 242; no. 14; pp. 2902 - 2909
• Main Authors: Karabulut, I, Unlu, S, Safak, H
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag 01-11-2005; WILEY‐VCH Verlag; Wiley
• Subjects: 73.21.Fg; 78.66.Fd; 78.67.De; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures; Physics; Quantum dots; Aluminium arsenides; Gallium arsenides; Interband transitions; Quantum dots; Refractive index; Optical transition; Density matrix; Subband; Non linear effect; Absorption coefficients
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/pssb.200541093

Analytic forms of the changes of the absorption and refractive index associated with intersubband optical transitions in a quantum box are obtained by using the compact density matrix approach. Numerical results are presented for a typical AlGaAs/GaAs quantum box system. The linear, third‐order nonlinear, and total refractive‐index and absorption changes are examined as a function of the incident optical intensity. The results obtained show that the incident optical intensity has a great effect on the total absorption and refractive‐index changes. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)