Bloch Oscillation under a Bichromatic Laser: Quasi-Miniband Formation, Collapse, and Dynamical Delocalization and Localization
Mesoscale and Nanoscale Physics
2009-10-31 v1
Abstract
A novel DC and AC driving configuration is proposed for semiconductor superlattices, in which the THz AC driving is provided by an intense bichromatic cw laser. The two components of the laser, usually in the visible light range, are near but not exactly resonant with interband Wannier-Stark transitions, and their frequency difference equals the Wannier-Stark ladder spacing. Multi-photon processes with the intermediate states in the conduction (valence) band cause dynamical delocalization and localization of valence (conduction) electrons, and the corresponding formation and collapse of the quasi-minibands.
Keywords
Cite
@article{arxiv.cond-mat/9906355,
title = {Bloch Oscillation under a Bichromatic Laser: Quasi-Miniband Formation, Collapse, and Dynamical Delocalization and Localization},
author = {Ren-Bao Liu and Bang-Fen Zhu},
journal= {arXiv preprint arXiv:cond-mat/9906355},
year = {2009}
}
Comments
4 pages, 3 figures