Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Inversion of the exciton fine structure splitting in quantum dots
AU - Young, R. J.
AU - Stevenson, R. M.
AU - Shields, A. J.
AU - Atkinson, P.
AU - Cooper, K.
AU - Ritchie, D. A.
AU - Groom, K. M.
AU - Tartakovskii, A. I.
AU - Skolnick, M. S.
PY - 2006/5
Y1 - 2006/5
N2 - The fine structure splitting of exciton state was measured for a large number of single InAs quantum dots in GaAs. It is shown to decrease as the exciton confinement decreases, crucially passing through zero and changing sign. Degeneracy of the exciton spin states is an important step to producing entangled photons from the biexciton cascade. Thermal annealing reduces the exciton confinement and thereby increases the number of degenerate dots in a particular sample. (c) 2006 Elsevier B.V. All rights reserved.
AB - The fine structure splitting of exciton state was measured for a large number of single InAs quantum dots in GaAs. It is shown to decrease as the exciton confinement decreases, crucially passing through zero and changing sign. Degeneracy of the exciton spin states is an important step to producing entangled photons from the biexciton cascade. Thermal annealing reduces the exciton confinement and thereby increases the number of degenerate dots in a particular sample. (c) 2006 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.physe.2005.12.070
DO - 10.1016/j.physe.2005.12.070
M3 - Journal article
VL - 32
SP - 97
EP - 100
JO - Physica E: Low-dimensional Systems and Nanostructures
JF - Physica E: Low-dimensional Systems and Nanostructures
SN - 1386-9477
IS - 1-2
ER -