Maxwell-Bloch formulation for semiconductors: Effects of coherent Coulomb exchange

Journal Article · Mon May 01 04:00:00 EDT 1995 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.51.4132· OSTI ID:165197

Bowden, C M ^[1]; Agrawal, G P ^[2]

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1. Weapons Sciences Directorate, AMSMI-RD-WS-ST, Research, Development, Engineering Center, U. S. Army Missile Command, Redstone Arsenal, Alabama 35898-5248 (United States)
2. The Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)

A generalized Bloch-Maxwell formulation for laser-field-coupled semiconductors is derived from a two-band model which includes direct Coulomb interactions. The momentum-dependent, microscopic, electron-hole equations of motion in the time-dependent Hartree-Fock approximation and neglecting interband exchange interactions form the starting point for the formulation. A self-consistent set of coupled equations in four dynamical variables for the medium, together with the electric-field amplitude coupled through the Maxwell wave equation in a semiclassical approximation, are obtained to lowest order in the coherent Coulomb exchange interaction and the density-of-states distribution. Intrinsic optical bistability is predicted in a steady state due to a carrier density-dependent redshift of the band edge due explicitly to coherent Coulomb exchange. Integration of the dynamical equations for conditions which correspond to the ultrafast time regime exhibit intrinsic adiabatic inversion, adiabatic following, anomalous Rabi cycling, and unique, as well as fast, optical switching, all of which depend upon the coherent Coulomb exchange interaction.

• OSTI ID: 165197
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 5 Vol. 51; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BLOCH EQUATIONS
COULOMB EXCITATION
ELECTROMAGNETIC FIELDS
GAIN
REFRACTIVE INDEX
SATURATION
SEMICONDUCTOR LASERS