Dynamical Franz-Keldysh effect of an electron gas in high magnetic fields and intense laser fields

When an electron gas is subjected simultaneously to quantizing magnetic fie lds and intense laser fields in Faraday geometry, the electron density of s tates and the fundamental absorption edge will be shifted by an energy E-em = (eF(0))(2)/[(4m*(w(2) - w(c)(2))], where w and F-0 are, respectively, th e frequency and the electric field strength of the laser field and w, is th e cyclotron frequency. This is known as dynamical Franz-Keldysh effect (DFK E). In this paper, we study theoretically the DFKE for a semiconductor-base d electron gas system in the presence of quantizing magnetic fields and of intense terahertz (THz) laser fields. (C) 2001 Elsevier Science B.V. All ri ghts reserved.