Ensemble effect on Rabi oscillations of excitons in quantum dots

Mamiko Kujiraoka, Junko Hayase, Kouichi Akahane, Naokatsu Yamamoto, Kazuhiro Ema, Masahide Sasaki

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We observed excitonic Rabi oscillations (ROs) in quantum dots (QDs) by four-wave mixing (FWM) and pump-probe techniques. When a large number of QDs are excited by a spatially nonuniform laser, the inhomogeneous distribution of the transition dipole moments of the QD excitons and the spa-tial distribution of the input electric field induce distribution of the Rabi frequencies. We investigated this ensemble effect on the ROs of the excitonic polarization and the excitonic population observed in the FWM and pump-probe signals. By calculating the FWM and pump-probe signals including the Gaussian distribution of the pulse area, we first showed that a part of the ensemble effect can be cancelled out only in case of the ROs of the excitonic polarization. This reflects the dif-ferences between the characteristics of excitonic polarization and population.

Original languageEnglish
Pages (from-to)952-955
Number of pages4
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume206
Issue number5
DOIs
Publication statusPublished - 2009 May
Externally publishedYes

Fingerprint

Four wave mixing
Excitons
four-wave mixing
Semiconductor quantum dots
quantum dots
excitons
Pumps
Polarization
pumps
oscillations
probes
polarization
Dipole moment
Gaussian distribution
Electron transitions
normal density functions
dipole moments
Electric fields
electric fields
Lasers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

Ensemble effect on Rabi oscillations of excitons in quantum dots. / Kujiraoka, Mamiko; Hayase, Junko; Akahane, Kouichi; Yamamoto, Naokatsu; Ema, Kazuhiro; Sasaki, Masahide.

In: Physica Status Solidi (A) Applications and Materials Science, Vol. 206, No. 5, 05.2009, p. 952-955.

Research output: Contribution to journalArticle

Kujiraoka, Mamiko ; Hayase, Junko ; Akahane, Kouichi ; Yamamoto, Naokatsu ; Ema, Kazuhiro ; Sasaki, Masahide. / Ensemble effect on Rabi oscillations of excitons in quantum dots. In: Physica Status Solidi (A) Applications and Materials Science. 2009 ; Vol. 206, No. 5. pp. 952-955.
@article{c0f9de882b1946afa75d9b627a716cee,
title = "Ensemble effect on Rabi oscillations of excitons in quantum dots",
abstract = "We observed excitonic Rabi oscillations (ROs) in quantum dots (QDs) by four-wave mixing (FWM) and pump-probe techniques. When a large number of QDs are excited by a spatially nonuniform laser, the inhomogeneous distribution of the transition dipole moments of the QD excitons and the spa-tial distribution of the input electric field induce distribution of the Rabi frequencies. We investigated this ensemble effect on the ROs of the excitonic polarization and the excitonic population observed in the FWM and pump-probe signals. By calculating the FWM and pump-probe signals including the Gaussian distribution of the pulse area, we first showed that a part of the ensemble effect can be cancelled out only in case of the ROs of the excitonic polarization. This reflects the dif-ferences between the characteristics of excitonic polarization and population.",
author = "Mamiko Kujiraoka and Junko Hayase and Kouichi Akahane and Naokatsu Yamamoto and Kazuhiro Ema and Masahide Sasaki",
year = "2009",
month = "5",
doi = "10.1002/pssa.200881307",
language = "English",
volume = "206",
pages = "952--955",
journal = "Physica Status Solidi (A) Applications and Materials Science",
issn = "1862-6300",
publisher = "Wiley-VCH Verlag",
number = "5",

}

TY - JOUR

T1 - Ensemble effect on Rabi oscillations of excitons in quantum dots

AU - Kujiraoka, Mamiko

AU - Hayase, Junko

AU - Akahane, Kouichi

AU - Yamamoto, Naokatsu

AU - Ema, Kazuhiro

AU - Sasaki, Masahide

PY - 2009/5

Y1 - 2009/5

N2 - We observed excitonic Rabi oscillations (ROs) in quantum dots (QDs) by four-wave mixing (FWM) and pump-probe techniques. When a large number of QDs are excited by a spatially nonuniform laser, the inhomogeneous distribution of the transition dipole moments of the QD excitons and the spa-tial distribution of the input electric field induce distribution of the Rabi frequencies. We investigated this ensemble effect on the ROs of the excitonic polarization and the excitonic population observed in the FWM and pump-probe signals. By calculating the FWM and pump-probe signals including the Gaussian distribution of the pulse area, we first showed that a part of the ensemble effect can be cancelled out only in case of the ROs of the excitonic polarization. This reflects the dif-ferences between the characteristics of excitonic polarization and population.

AB - We observed excitonic Rabi oscillations (ROs) in quantum dots (QDs) by four-wave mixing (FWM) and pump-probe techniques. When a large number of QDs are excited by a spatially nonuniform laser, the inhomogeneous distribution of the transition dipole moments of the QD excitons and the spa-tial distribution of the input electric field induce distribution of the Rabi frequencies. We investigated this ensemble effect on the ROs of the excitonic polarization and the excitonic population observed in the FWM and pump-probe signals. By calculating the FWM and pump-probe signals including the Gaussian distribution of the pulse area, we first showed that a part of the ensemble effect can be cancelled out only in case of the ROs of the excitonic polarization. This reflects the dif-ferences between the characteristics of excitonic polarization and population.

UR - http://www.scopus.com/inward/record.url?scp=65649084092&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=65649084092&partnerID=8YFLogxK

U2 - 10.1002/pssa.200881307

DO - 10.1002/pssa.200881307

M3 - Article

AN - SCOPUS:65649084092

VL - 206

SP - 952

EP - 955

JO - Physica Status Solidi (A) Applications and Materials Science

JF - Physica Status Solidi (A) Applications and Materials Science

SN - 1862-6300

IS - 5

ER -