Femtosecond Coherent Dynamics of the Fermi-Edge Singularity and Exciton Hybrid

Journal Article · Sun Feb 27 23:00:00 EST 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.84.2006· OSTI ID:20215656

Shahbazyan, T V; Primozich, N; Perakis, I E; Chemla, D S

We study theoretically the coherent nonlinear optical response of doped quantum wells with several subbands. When the Fermi energy approaches the exciton level of an upper subband, the absorption spectrum acquires a characteristic double-peak shape originating from the interference between the Fermi-edge singularity and the exciton resonance. We demonstrate that, for off-resonant pump excitation, the pump-probe spectrum undergoes a striking transformation, with a time-dependent exchange of oscillator strength between the Fermi-edge singularity and exciton peaks. This effect originates from the many-body electron-hole correlations which determine the dynamical response of the Fermi sea. (c) 2000 The American Physical Society.

• OSTI ID: 20215656
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 84; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ELECTRON CORRELATION
ELECTRONIC STRUCTURE
EXCITONS
FERMI GAS
FERMI LEVEL
MANY-BODY PROBLEM
NONLINEAR OPTICS
OSCILLATOR STRENGTHS
SEMICONDUCTOR JUNCTIONS
THEORETICAL DATA