Exciton-phonon coupling in single quantum dots with different barriers

D. Dufker; L. O. Mereni; K. F. Karlsson; V. Dimastrodonato; G. Juska; P. O. Holtz; E. Pelucchi

doi:10.1063/1.3600781

Exciton-phonon coupling in single quantum dots with different barriers

D. Dufker
, L. O. Mereni
, K. F. Karlsson
, V. Dimastrodonato
, G. Juska
, P. O. Holtz
, E. Pelucchi

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

Abstract

The coupling between longitudinal-optical (LO) phonons and neutral excitons in two different kinds of InGaAs pyramidal quantum dots (QDs) embedded in either AlGaAs or GaAs barriers is experimentally examined. We find a slightly weaker exciton-LO-phonon coupling and increased linewidth of the phonon replicas for the QDs with GaAs barriers compared to the ones with AlGaAs barriers. These results, combined with the fact that the LO-phonon energy of the exciton is the same for both kinds of dots, are taken as evidence that the excitons mainly couple to LO-phonons within the QDs.

Original language	English
Article number	251911
Journal	Applied Physics Letters
Volume	98
Issue number	25
DOIs	https://doi.org/10.1063/1.3600781
Publication status	Published - 20 Jun 2011

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https://hdl.handle.net/10468/4319Licence: CC BY-NC-ND

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title = "Exciton-phonon coupling in single quantum dots with different barriers",

abstract = "The coupling between longitudinal-optical (LO) phonons and neutral excitons in two different kinds of InGaAs pyramidal quantum dots (QDs) embedded in either AlGaAs or GaAs barriers is experimentally examined. We find a slightly weaker exciton-LO-phonon coupling and increased linewidth of the phonon replicas for the QDs with GaAs barriers compared to the ones with AlGaAs barriers. These results, combined with the fact that the LO-phonon energy of the exciton is the same for both kinds of dots, are taken as evidence that the excitons mainly couple to LO-phonons within the QDs.",

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doi = "10.1063/1.3600781",

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T1 - Exciton-phonon coupling in single quantum dots with different barriers

AU - Dufker, D.

AU - Mereni, L. O.

AU - Karlsson, K. F.

AU - Dimastrodonato, V.

AU - Juska, G.

AU - Holtz, P. O.

AU - Pelucchi, E.

PY - 2011/6/20

Y1 - 2011/6/20

N2 - The coupling between longitudinal-optical (LO) phonons and neutral excitons in two different kinds of InGaAs pyramidal quantum dots (QDs) embedded in either AlGaAs or GaAs barriers is experimentally examined. We find a slightly weaker exciton-LO-phonon coupling and increased linewidth of the phonon replicas for the QDs with GaAs barriers compared to the ones with AlGaAs barriers. These results, combined with the fact that the LO-phonon energy of the exciton is the same for both kinds of dots, are taken as evidence that the excitons mainly couple to LO-phonons within the QDs.

AB - The coupling between longitudinal-optical (LO) phonons and neutral excitons in two different kinds of InGaAs pyramidal quantum dots (QDs) embedded in either AlGaAs or GaAs barriers is experimentally examined. We find a slightly weaker exciton-LO-phonon coupling and increased linewidth of the phonon replicas for the QDs with GaAs barriers compared to the ones with AlGaAs barriers. These results, combined with the fact that the LO-phonon energy of the exciton is the same for both kinds of dots, are taken as evidence that the excitons mainly couple to LO-phonons within the QDs.

UR - https://www.scopus.com/pages/publications/79959623235

U2 - 10.1063/1.3600781

DO - 10.1063/1.3600781

M3 - Article

AN - SCOPUS:79959623235

SN - 0003-6951

VL - 98

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 25

M1 - 251911

ER -

Exciton-phonon coupling in single quantum dots with different barriers

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