Self-consistent electronic subband structure in terahertz-driven two-dimensional electron gases
Department of Physics, University of Wollongong,
NSW 2522, Australia
Corresponding author: email@example.com
Accepted: 13 October 1997
A theoretical study on the influence of intense terahertz (THz) electromagnetic (EM) radiations on electronic structure is presented for a modulation-doped two-dimensional (2D) semiconductor system. We find that in the presence of a THz EM radiation field polarised linearly along the 2D plane of a 2D electron gas (2DEG), the electron density of states will be modified strongly by the radiation field. As a consequence, the Fermi-energy and the electron density in the sample system will be affected markedly by the EM radiations. The results obtained have indicated that the photon-modified electronic subband structure in a 2DEG device can be observed by using the recently developed free-electron laser sources.
PACS: 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers) / 78.30.Fs – III-V and II-VI semiconductors / 78.66.Fd – III-V semiconductors
© EDP Sciences, 1997