Exciton localisation in CdSe islands buried in a quantum well of Zn1-xCdxSe

F. Gindele; C. Märkle; U. Woggon; W. Langbein; J. M. Hvam; K. Leonardi; K. Ohkawa; D. Hommel

doi:10.1016/s0022-0248(98)80065-1

Exciton localisation in CdSe islands buried in a quantum well of Zn_1-xCd_xSe

F. Gindele^*, C. Märkle, U. Woggon, W. Langbein, J. M. Hvam, K. Leonardi, K. Ohkawa, D. Hommel

^*Corresponding author for this work

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

26 Scopus citations

Abstract

The optical properties of CdSe/ZnSe quantum structures with nominal thickness of the CdSe layer between 1 and 4 monolayers (ML) have been studied. The transition from two- to zero-dimensional quantum confinement can be monitored by photoluminescence (PL), photoluminescence-excitation (PLE), and time-resolved PL experiments. The influence of different degrees of localisation on the relaxation process of excitons is investigated. Experimental results for the excitonic transition energies are in good agreement with theory when strain-, confinement- and alloy-fluctuation-effects are included. The observation of multiple phonon modes indicates the formation of a Zn_1-xCd_xSe alloy with varying composition as well as the accumulation of CdSe in small islands.

Original language	English (US)
Pages (from-to)	306-310
Number of pages	5
Journal	Journal of Crystal Growth
Volume	184-185
DOIs	https://doi.org/10.1016/s0022-0248(98)80065-1
State	Published - 1998
Externally published	Yes

Keywords

Localisation
Photoluminescence-excitation
Self-assembled islands
ZnCdSe-phonon modes

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/s0022-0248(98)80065-1

Cite this

@article{0c045adc2ad3461b8f44b175f8fc1772,

title = "Exciton localisation in CdSe islands buried in a quantum well of Zn1-xCdxSe",

abstract = "The optical properties of CdSe/ZnSe quantum structures with nominal thickness of the CdSe layer between 1 and 4 monolayers (ML) have been studied. The transition from two- to zero-dimensional quantum confinement can be monitored by photoluminescence (PL), photoluminescence-excitation (PLE), and time-resolved PL experiments. The influence of different degrees of localisation on the relaxation process of excitons is investigated. Experimental results for the excitonic transition energies are in good agreement with theory when strain-, confinement- and alloy-fluctuation-effects are included. The observation of multiple phonon modes indicates the formation of a Zn1-xCdxSe alloy with varying composition as well as the accumulation of CdSe in small islands.",

keywords = "Localisation, Photoluminescence-excitation, Self-assembled islands, ZnCdSe-phonon modes",

author = "F. Gindele and C. M{\"a}rkle and U. Woggon and W. Langbein and Hvam, {J. M.} and K. Leonardi and K. Ohkawa and D. Hommel",

year = "1998",

doi = "10.1016/s0022-0248(98)80065-1",

language = "English (US)",

volume = "184-185",

pages = "306--310",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier",

}

TY - JOUR

T1 - Exciton localisation in CdSe islands buried in a quantum well of Zn1-xCdxSe

AU - Gindele, F.

AU - Märkle, C.

AU - Woggon, U.

AU - Langbein, W.

AU - Hvam, J. M.

AU - Leonardi, K.

AU - Ohkawa, K.

AU - Hommel, D.

PY - 1998

Y1 - 1998

N2 - The optical properties of CdSe/ZnSe quantum structures with nominal thickness of the CdSe layer between 1 and 4 monolayers (ML) have been studied. The transition from two- to zero-dimensional quantum confinement can be monitored by photoluminescence (PL), photoluminescence-excitation (PLE), and time-resolved PL experiments. The influence of different degrees of localisation on the relaxation process of excitons is investigated. Experimental results for the excitonic transition energies are in good agreement with theory when strain-, confinement- and alloy-fluctuation-effects are included. The observation of multiple phonon modes indicates the formation of a Zn1-xCdxSe alloy with varying composition as well as the accumulation of CdSe in small islands.

AB - The optical properties of CdSe/ZnSe quantum structures with nominal thickness of the CdSe layer between 1 and 4 monolayers (ML) have been studied. The transition from two- to zero-dimensional quantum confinement can be monitored by photoluminescence (PL), photoluminescence-excitation (PLE), and time-resolved PL experiments. The influence of different degrees of localisation on the relaxation process of excitons is investigated. Experimental results for the excitonic transition energies are in good agreement with theory when strain-, confinement- and alloy-fluctuation-effects are included. The observation of multiple phonon modes indicates the formation of a Zn1-xCdxSe alloy with varying composition as well as the accumulation of CdSe in small islands.

KW - Localisation

KW - Photoluminescence-excitation

KW - Self-assembled islands

KW - ZnCdSe-phonon modes

UR - http://www.scopus.com/inward/record.url?scp=11544357777&partnerID=8YFLogxK

U2 - 10.1016/s0022-0248(98)80065-1

DO - 10.1016/s0022-0248(98)80065-1

M3 - Article

AN - SCOPUS:11544357777

SN - 0022-0248

VL - 184-185

SP - 306

EP - 310

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

ER -