Tunable photoemission from an excitonic antitrap

Katarzyna Kowalik-Seidl; Xaver P. Vögele; Bernhard N. Rimpfl; Georg J. Schinner; Dieter Schuh; Werner Wegscheider; Alexander W. Holleitner; Jörg P. Kotthaus

doi:10.1021/nl203613k

Tunable photoemission from an excitonic antitrap

Katarzyna Kowalik-Seidl, Xaver P. Vögele, Bernhard N. Rimpfl, Georg J. Schinner, Dieter Schuh, Werner Wegscheider, Alexander W. Holleitner, Jörg P. Kotthaus

Chair of Nanotechnology and Nanomaterials

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

20 Scopus citations

Abstract

We study the influence of lithographically defined, electrostatic trap configurations on the photon emission from dipolar excitons in coupled quantum wells. The emission is surprisingly enhanced for an excitonic antitrap compared to a trap configuration, an effect more pronounced for a trap with smaller diameter. We explain the observations by the interplay between the exciton formation process, the lateral charge-carrier dynamics, and the dipole-dipole interactions between the excitons. Exploiting this interplay allows us to efficiently tune the excitonic emission energy with very small intensity variation.

Original language	English
Pages (from-to)	326-330
Number of pages	5
Journal	Nano Letters
Volume	12
Issue number	1
DOIs	https://doi.org/10.1021/nl203613k
State	Published - 11 Jan 2012

Keywords

Dipolar exciton
electro-optical modulator
exciton antitrap
exciton trap

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10.1021/nl203613k

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title = "Tunable photoemission from an excitonic antitrap",

abstract = "We study the influence of lithographically defined, electrostatic trap configurations on the photon emission from dipolar excitons in coupled quantum wells. The emission is surprisingly enhanced for an excitonic antitrap compared to a trap configuration, an effect more pronounced for a trap with smaller diameter. We explain the observations by the interplay between the exciton formation process, the lateral charge-carrier dynamics, and the dipole-dipole interactions between the excitons. Exploiting this interplay allows us to efficiently tune the excitonic emission energy with very small intensity variation.",

keywords = "Dipolar exciton, electro-optical modulator, exciton antitrap, exciton trap",

author = "Katarzyna Kowalik-Seidl and V{\"o}gele, {Xaver P.} and Rimpfl, {Bernhard N.} and Schinner, {Georg J.} and Dieter Schuh and Werner Wegscheider and Holleitner, {Alexander W.} and Kotthaus, {J{\"o}rg P.}",

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doi = "10.1021/nl203613k",

language = "English",

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T1 - Tunable photoemission from an excitonic antitrap

AU - Kowalik-Seidl, Katarzyna

AU - Vögele, Xaver P.

AU - Rimpfl, Bernhard N.

AU - Schinner, Georg J.

AU - Schuh, Dieter

AU - Wegscheider, Werner

AU - Holleitner, Alexander W.

AU - Kotthaus, Jörg P.

PY - 2012/1/11

Y1 - 2012/1/11

N2 - We study the influence of lithographically defined, electrostatic trap configurations on the photon emission from dipolar excitons in coupled quantum wells. The emission is surprisingly enhanced for an excitonic antitrap compared to a trap configuration, an effect more pronounced for a trap with smaller diameter. We explain the observations by the interplay between the exciton formation process, the lateral charge-carrier dynamics, and the dipole-dipole interactions between the excitons. Exploiting this interplay allows us to efficiently tune the excitonic emission energy with very small intensity variation.

AB - We study the influence of lithographically defined, electrostatic trap configurations on the photon emission from dipolar excitons in coupled quantum wells. The emission is surprisingly enhanced for an excitonic antitrap compared to a trap configuration, an effect more pronounced for a trap with smaller diameter. We explain the observations by the interplay between the exciton formation process, the lateral charge-carrier dynamics, and the dipole-dipole interactions between the excitons. Exploiting this interplay allows us to efficiently tune the excitonic emission energy with very small intensity variation.

KW - Dipolar exciton

KW - electro-optical modulator

KW - exciton antitrap

KW - exciton trap

UR - http://www.scopus.com/inward/record.url?scp=84855798602&partnerID=8YFLogxK

U2 - 10.1021/nl203613k

DO - 10.1021/nl203613k

M3 - Article

C2 - 22142491

AN - SCOPUS:84855798602

SN - 1530-6984

VL - 12

SP - 326

EP - 330

JO - Nano Letters

JF - Nano Letters

IS - 1

ER -

Tunable photoemission from an excitonic antitrap

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Keywords

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