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Dynamics of bright and dark excitons in a self-assembled quantum dot

Abstract:

We report on a spin-flip process in a charge tunable quantum dot in which a non-radiative dark exciton, with angular momentum L = 2, becomes a radiative bright exciton, L = 1, through interactions with a Fermi sea in an n-doped back contact. This process presents itself by a strongly bias dependent secondary lifetime in radiative lifetime measurements of the neutral exciton. By studying dots with different emission energies the spin-flip process is shown to have a strong dependence on the tun...

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Publication status:
Published

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Publisher copy:
10.1063/1.1994272

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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author
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Volume:
772
Pages:
645-646
Host title:
Physics of Semiconductors, Pts A and B
Publication date:
2005-01-01
DOI:
EISSN:
1551-7616
ISSN:
0094-243X
Source identifiers:
135243
ISBN:
0735402574
Pubs id:
pubs:135243
UUID:
uuid:cf011397-b1a1-415f-9757-bc806350ce41
Local pid:
pubs:135243
Deposit date:
2014-08-17

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