Phase-dependent intersubband optical properties of asymmetric AlGaAs/GaAs coupled quantum wells

A Golestani, A Khaledi-Nasab, Asghar Asgari Tokaldani

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    Abstract

    In this article, we have investigated the optical properties of intersubband transitions in an asymmetric AlGaAs/GaAs coupled quantum wells system. We solved the Schrödinger equation numerically using homemade finite difference codes to determine the electronic structure. The susceptibilities were calculated in frame of density matrix equations. The effect of relative phase variation between applied fields, on the linear absorption coefficients, relative refractive index changes, and group velocity has been investigated. The results show that the linear optical properties are extremely phase-dependent. By adjusting the phase, it is possible to obtain absorption curves with dispersion-like profile and vice versa. © 2015 Taylor and Francis.
    Original languageEnglish
    Pages (from-to)566-574
    Number of pages9
    JournalJournal of Modern Optics
    Volume63
    Issue number6
    DOIs
    Publication statusPublished - 2016

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