Abstract
When a three-dimensional electron gas is subjected to quantizing magnetic fields and intense laser fields in the Faraday geometry, the maximum electron density of states will be shifted by an energy ${E}_{\mathrm{em}}{=(eF}_{0}{)}^{2}/[{4m}^{*}({\ensuremath{\omega}}^{2}\ensuremath{-}{\ensuremath{\omega}}_{c}^{2})],$ where \ensuremath{\omega} and ${F}_{0}$ are, respectively, the frequency and the electric-field strength of the laser field and ${\ensuremath{\omega}}_{c}$ is the cyclotron frequency. This will result in a shift in the fundamental absorption edge by ${E}_{\mathrm{em}},$ known as the magneto-optical Franz-Keldysh effect (MOFKE). In this paper, the MOFKE is studied theoretically for a semiconductor-based electron gas system where terahertz free-electron lasers are employed as intense laser radiation sources.
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