Long exciton spin relaxation in coupled quantum wells

K. Kowalik-Seidl; X. P. Vögele; B. N. Rimpfl; S. Manus; J. P. Kotthaus; D. Schuh; W. Wegscheider; A. W. Holleitner

doi:10.1063/1.3458703

Long exciton spin relaxation in coupled quantum wells

K. Kowalik-Seidl, X. P. Vögele, B. N. Rimpfl, S. Manus, J. P. Kotthaus, D. Schuh, W. Wegscheider, A. W. Holleitner

Chair of Nanotechnology and Nanomaterials

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

18 Scopus citations

Abstract

Spatially indirect excitons in a coupled quantum well structure were studied by means of polarization and time-resolved photoluminescence. A strong degree of circular polarization (>50%) in emission was achieved when the excitation energy was tuned into resonance with the direct exciton state. The indirect transition remained polarized several tens of nanoseconds after the pumping laser pulse, demonstrating directly a very long relaxation time of exciton spin. The observed spin relaxation time exceeds the radiative lifetime of the indirect excitons.

Original language	English
Article number	011104
Journal	Applied Physics Letters
Volume	97
Issue number	1
DOIs	https://doi.org/10.1063/1.3458703
State	Published - 5 Jul 2010

Access to Document

10.1063/1.3458703

Cite this

@article{1dfe48a7486d4b049812a9cc3e13e1d0,

title = "Long exciton spin relaxation in coupled quantum wells",

abstract = "Spatially indirect excitons in a coupled quantum well structure were studied by means of polarization and time-resolved photoluminescence. A strong degree of circular polarization (>50%) in emission was achieved when the excitation energy was tuned into resonance with the direct exciton state. The indirect transition remained polarized several tens of nanoseconds after the pumping laser pulse, demonstrating directly a very long relaxation time of exciton spin. The observed spin relaxation time exceeds the radiative lifetime of the indirect excitons.",

author = "K. Kowalik-Seidl and V{\"o}gele, {X. P.} and Rimpfl, {B. N.} and S. Manus and Kotthaus, {J. P.} and D. Schuh and W. Wegscheider and Holleitner, {A. W.}",

year = "2010",

month = jul,

day = "5",

doi = "10.1063/1.3458703",

language = "English",

volume = "97",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "1",

}

TY - JOUR

T1 - Long exciton spin relaxation in coupled quantum wells

AU - Kowalik-Seidl, K.

AU - Vögele, X. P.

AU - Rimpfl, B. N.

AU - Manus, S.

AU - Kotthaus, J. P.

AU - Schuh, D.

AU - Wegscheider, W.

AU - Holleitner, A. W.

PY - 2010/7/5

Y1 - 2010/7/5

N2 - Spatially indirect excitons in a coupled quantum well structure were studied by means of polarization and time-resolved photoluminescence. A strong degree of circular polarization (>50%) in emission was achieved when the excitation energy was tuned into resonance with the direct exciton state. The indirect transition remained polarized several tens of nanoseconds after the pumping laser pulse, demonstrating directly a very long relaxation time of exciton spin. The observed spin relaxation time exceeds the radiative lifetime of the indirect excitons.

AB - Spatially indirect excitons in a coupled quantum well structure were studied by means of polarization and time-resolved photoluminescence. A strong degree of circular polarization (>50%) in emission was achieved when the excitation energy was tuned into resonance with the direct exciton state. The indirect transition remained polarized several tens of nanoseconds after the pumping laser pulse, demonstrating directly a very long relaxation time of exciton spin. The observed spin relaxation time exceeds the radiative lifetime of the indirect excitons.

UR - http://www.scopus.com/inward/record.url?scp=77954753825&partnerID=8YFLogxK

U2 - 10.1063/1.3458703

DO - 10.1063/1.3458703

M3 - Article

AN - SCOPUS:77954753825

SN - 0003-6951

VL - 97

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 1

M1 - 011104

ER -

Long exciton spin relaxation in coupled quantum wells

Abstract

Access to Document

Other files and links

Fingerprint

Cite this