Picosecond timescale carrier dynamics of InAs quantum dots: The role of a continuum background

G. Rainó; G. Visimberga; A. Salhi; M. Todaro; M. De Vittorio; A. Passaseo; R. Cingolani; M. De Giorgi

doi:10.1016/j.spmi.2007.06.018

Picosecond timescale carrier dynamics of InAs quantum dots: The role of a continuum background

G. Rainó^*, G. Visimberga, A. Salhi, M. Todaro, M. De Vittorio, A. Passaseo, R. Cingolani, M. De Giorgi

^*Corresponding author for this work

Università di Lecce

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We have investigated the ultrafast carrier dynamics in Molecular Beam Epitaxy (MBE)-grown InAs/InGaAs/GaAs quantum dots emitting at 1.3 μm by means of time resolved photoluminescence upconversion measurements with a time resolution of about 200 fs. The detection energies scan the spectral region from the energy of the quantum dot excitonic transition up to the barrier layer absorption edge. We found, under high excitation intensity, that the intrinsic electronic states are populated mainly by carriers directly captured from the barrier.

Original language	English
Pages (from-to)	445-448
Number of pages	4
Journal	Superlattices and Microstructures
Volume	43
Issue number	5-6
DOIs	https://doi.org/10.1016/j.spmi.2007.06.018
Publication status	Published - May 2008
Externally published	Yes

Keywords

Carrier relaxation
Quantum dots
Ultrafast spectroscopy

Access to Document

10.1016/j.spmi.2007.06.018

Cite this

@article{37af3d7d506c4906b9a90daf29a3b96b,

title = "Picosecond timescale carrier dynamics of InAs quantum dots: The role of a continuum background",

abstract = "We have investigated the ultrafast carrier dynamics in Molecular Beam Epitaxy (MBE)-grown InAs/InGaAs/GaAs quantum dots emitting at 1.3 μm by means of time resolved photoluminescence upconversion measurements with a time resolution of about 200 fs. The detection energies scan the spectral region from the energy of the quantum dot excitonic transition up to the barrier layer absorption edge. We found, under high excitation intensity, that the intrinsic electronic states are populated mainly by carriers directly captured from the barrier.",

keywords = "Carrier relaxation, Quantum dots, Ultrafast spectroscopy",

author = "G. Rain{\'o} and G. Visimberga and A. Salhi and M. Todaro and {De Vittorio}, M. and A. Passaseo and R. Cingolani and {De Giorgi}, M.",

year = "2008",

month = may,

doi = "10.1016/j.spmi.2007.06.018",

language = "English",

volume = "43",

pages = "445--448",

journal = "Superlattices and Microstructures",

issn = "0749-6036",

publisher = "Elsevier Ltd",

number = "5-6",

}

TY - JOUR

T1 - Picosecond timescale carrier dynamics of InAs quantum dots

T2 - The role of a continuum background

AU - Rainó, G.

AU - Visimberga, G.

AU - Salhi, A.

AU - Todaro, M.

AU - De Vittorio, M.

AU - Passaseo, A.

AU - Cingolani, R.

AU - De Giorgi, M.

PY - 2008/5

Y1 - 2008/5

N2 - We have investigated the ultrafast carrier dynamics in Molecular Beam Epitaxy (MBE)-grown InAs/InGaAs/GaAs quantum dots emitting at 1.3 μm by means of time resolved photoluminescence upconversion measurements with a time resolution of about 200 fs. The detection energies scan the spectral region from the energy of the quantum dot excitonic transition up to the barrier layer absorption edge. We found, under high excitation intensity, that the intrinsic electronic states are populated mainly by carriers directly captured from the barrier.

AB - We have investigated the ultrafast carrier dynamics in Molecular Beam Epitaxy (MBE)-grown InAs/InGaAs/GaAs quantum dots emitting at 1.3 μm by means of time resolved photoluminescence upconversion measurements with a time resolution of about 200 fs. The detection energies scan the spectral region from the energy of the quantum dot excitonic transition up to the barrier layer absorption edge. We found, under high excitation intensity, that the intrinsic electronic states are populated mainly by carriers directly captured from the barrier.

KW - Carrier relaxation

KW - Quantum dots

KW - Ultrafast spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=42949128007&partnerID=8YFLogxK

U2 - 10.1016/j.spmi.2007.06.018

DO - 10.1016/j.spmi.2007.06.018

M3 - Article

AN - SCOPUS:42949128007

SN - 0749-6036

VL - 43

SP - 445

EP - 448

JO - Superlattices and Microstructures

JF - Superlattices and Microstructures

IS - 5-6

ER -

Picosecond timescale carrier dynamics of InAs quantum dots: The role of a continuum background

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this