Continuum contribution to excitonic four-wave mixing due to interaction-induced nonlinearities

Dan Birkedal; Lyssenko Vadim; Jørn Märcher Hvam; K. El Sayed

doi:10.1103/PhysRevB.54.R14250

Continuum contribution to excitonic four-wave mixing due to interaction-induced nonlinearities

Dan Birkedal
, Lyssenko Vadim
, Jørn Märcher Hvam
, K. El Sayed

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

We present an experimental and theoretical investigation of ultrafast transient four-wave mixing of GaAs/AlxGa1-xAs quantum wells for coherent excitation of exciton and continuum states. The signal appears at the exciton resonance and is shown to consist of two contributions: an intense spectrally narrow part only present for short time delays and a weak exponentially decaying part reflecting the intrinsic coherence properties of the exciton states. The intense part of the signal is due to the excitation of the continuum states mediated by interaction-induced nonlinearities.

Original language	English
Journal	Physical Review B
Volume	54
Issue number	20
Pages (from-to)	R14250-R14253
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.54.R14250
Publication status	Published - 1996

Bibliographical note

Copyright (1996) American Physical Society.

Keywords

RELAXATION
EXCITATION
SPECTROSCOPY
SEMICONDUCTOR
POLARIZATION
PHOTON-ECHO
QUANTUM-WELL
OSCILLATIONS
COHERENT DYNAMICS
BULK GAAS

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10.1103/PhysRevB.54.R14250

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title = "Continuum contribution to excitonic four-wave mixing due to interaction-induced nonlinearities",

abstract = "We present an experimental and theoretical investigation of ultrafast transient four-wave mixing of GaAs/AlxGa1-xAs quantum wells for coherent excitation of exciton and continuum states. The signal appears at the exciton resonance and is shown to consist of two contributions: an intense spectrally narrow part only present for short time delays and a weak exponentially decaying part reflecting the intrinsic coherence properties of the exciton states. The intense part of the signal is due to the excitation of the continuum states mediated by interaction-induced nonlinearities.",

keywords = "RELAXATION, EXCITATION, SPECTROSCOPY, SEMICONDUCTOR, POLARIZATION, PHOTON-ECHO, QUANTUM-WELL, OSCILLATIONS, COHERENT DYNAMICS, BULK GAAS",

author = "Dan Birkedal and Lyssenko Vadim and Hvam, \{J{\o}rn M{\"a}rcher\} and Sayed, \{K. El\}",

note = "Copyright (1996) American Physical Society.",

year = "1996",

doi = "10.1103/PhysRevB.54.R14250",

language = "English",

volume = "54",

pages = "R14250--R14253",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "20",

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TY - JOUR

T1 - Continuum contribution to excitonic four-wave mixing due to interaction-induced nonlinearities

AU - Birkedal, Dan

AU - Vadim, Lyssenko

AU - Hvam, Jørn Märcher

AU - Sayed, K. El

N1 - Copyright (1996) American Physical Society.

PY - 1996

Y1 - 1996

N2 - We present an experimental and theoretical investigation of ultrafast transient four-wave mixing of GaAs/AlxGa1-xAs quantum wells for coherent excitation of exciton and continuum states. The signal appears at the exciton resonance and is shown to consist of two contributions: an intense spectrally narrow part only present for short time delays and a weak exponentially decaying part reflecting the intrinsic coherence properties of the exciton states. The intense part of the signal is due to the excitation of the continuum states mediated by interaction-induced nonlinearities.

AB - We present an experimental and theoretical investigation of ultrafast transient four-wave mixing of GaAs/AlxGa1-xAs quantum wells for coherent excitation of exciton and continuum states. The signal appears at the exciton resonance and is shown to consist of two contributions: an intense spectrally narrow part only present for short time delays and a weak exponentially decaying part reflecting the intrinsic coherence properties of the exciton states. The intense part of the signal is due to the excitation of the continuum states mediated by interaction-induced nonlinearities.

KW - RELAXATION

KW - EXCITATION

KW - SPECTROSCOPY

KW - SEMICONDUCTOR

KW - POLARIZATION

KW - PHOTON-ECHO

KW - QUANTUM-WELL

KW - OSCILLATIONS

KW - COHERENT DYNAMICS

KW - BULK GAAS

U2 - 10.1103/PhysRevB.54.R14250

DO - 10.1103/PhysRevB.54.R14250

M3 - Journal article

SN - 2469-9950

VL - 54

SP - R14250-R14253

JO - Physical Review B

JF - Physical Review B

IS - 20

ER -

Continuum contribution to excitonic four-wave mixing due to interaction-induced nonlinearities

Abstract

Bibliographical note

Keywords

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