Multiple-frequency quantum beats of quantum confined exciton states

A.V. Trifonov, I.Y. Gerlovin, I.V. Ignatiev, I.A. Yugova, R.V. Cherbunin, Y.P. Efimov, S.A. Eliseev, V.V. Petrov, V.A. Lovtcius, A.V. Kavokin

Research output

4 Citations (Scopus)

Abstract

Multiple frequency quantum beats of a system of the coherently excited quantum confined exciton states in a high-quality semiconductor structure containing a wide InGaAs/GaAs quantum well are experimentally detected by the spectrally resolved pump-probe method. The beat signal is observed both at positive and at negative delays between the pump and probe pulses. Several quantum beat (QB) frequencies are observed in the experiments, which coincide with the interlevel spacings in the exciton system. A theoretical model is developed, which allows one to attribute the QBs at negative delay to the four-wave mixing (FWM) signal detected at the nonstandard direction. The beat signal is strongly enhanced by the interference of theFWMsignal with the secondary emission induced by the probe pulse. At positive delays, the QBs are due to the interference of the quantum confined exciton states. The decay time for QBs is of the order of several picoseconds both at positive and negative delays. This is close to the relaxatio
Original languageEnglish
Pages (from-to)201301
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number20
DOIs
Publication statusPublished - 2015

Fingerprint

Excitons
synchronism
excitons
Pumps
pumps
interference
beat frequencies
probes
Four wave mixing
pulses
four-wave mixing
Semiconductor quantum wells
spacing
quantum wells
Semiconductor materials
decay
LDS 751
Experiments
gallium arsenide

Cite this

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title = "Multiple-frequency quantum beats of quantum confined exciton states",
abstract = "Multiple frequency quantum beats of a system of the coherently excited quantum confined exciton states in a high-quality semiconductor structure containing a wide InGaAs/GaAs quantum well are experimentally detected by the spectrally resolved pump-probe method. The beat signal is observed both at positive and at negative delays between the pump and probe pulses. Several quantum beat (QB) frequencies are observed in the experiments, which coincide with the interlevel spacings in the exciton system. A theoretical model is developed, which allows one to attribute the QBs at negative delay to the four-wave mixing (FWM) signal detected at the nonstandard direction. The beat signal is strongly enhanced by the interference of theFWMsignal with the secondary emission induced by the probe pulse. At positive delays, the QBs are due to the interference of the quantum confined exciton states. The decay time for QBs is of the order of several picoseconds both at positive and negative delays. This is close to the relaxatio",
author = "A.V. Trifonov and I.Y. Gerlovin and I.V. Ignatiev and I.A. Yugova and R.V. Cherbunin and Y.P. Efimov and S.A. Eliseev and V.V. Petrov and V.A. Lovtcius and A.V. Kavokin",
year = "2015",
doi = "10.1103/PhysRevB.92.201301",
language = "English",
volume = "92",
pages = "201301",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
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TY - JOUR

T1 - Multiple-frequency quantum beats of quantum confined exciton states

AU - Trifonov, A.V.

AU - Gerlovin, I.Y.

AU - Ignatiev, I.V.

AU - Yugova, I.A.

AU - Cherbunin, R.V.

AU - Efimov, Y.P.

AU - Eliseev, S.A.

AU - Petrov, V.V.

AU - Lovtcius, V.A.

AU - Kavokin, A.V.

PY - 2015

Y1 - 2015

N2 - Multiple frequency quantum beats of a system of the coherently excited quantum confined exciton states in a high-quality semiconductor structure containing a wide InGaAs/GaAs quantum well are experimentally detected by the spectrally resolved pump-probe method. The beat signal is observed both at positive and at negative delays between the pump and probe pulses. Several quantum beat (QB) frequencies are observed in the experiments, which coincide with the interlevel spacings in the exciton system. A theoretical model is developed, which allows one to attribute the QBs at negative delay to the four-wave mixing (FWM) signal detected at the nonstandard direction. The beat signal is strongly enhanced by the interference of theFWMsignal with the secondary emission induced by the probe pulse. At positive delays, the QBs are due to the interference of the quantum confined exciton states. The decay time for QBs is of the order of several picoseconds both at positive and negative delays. This is close to the relaxatio

AB - Multiple frequency quantum beats of a system of the coherently excited quantum confined exciton states in a high-quality semiconductor structure containing a wide InGaAs/GaAs quantum well are experimentally detected by the spectrally resolved pump-probe method. The beat signal is observed both at positive and at negative delays between the pump and probe pulses. Several quantum beat (QB) frequencies are observed in the experiments, which coincide with the interlevel spacings in the exciton system. A theoretical model is developed, which allows one to attribute the QBs at negative delay to the four-wave mixing (FWM) signal detected at the nonstandard direction. The beat signal is strongly enhanced by the interference of theFWMsignal with the secondary emission induced by the probe pulse. At positive delays, the QBs are due to the interference of the quantum confined exciton states. The decay time for QBs is of the order of several picoseconds both at positive and negative delays. This is close to the relaxatio

U2 - 10.1103/PhysRevB.92.201301

DO - 10.1103/PhysRevB.92.201301

M3 - Article

VL - 92

SP - 201301

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 20

ER -