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 - Control of fine-structure splitting of individual InAs quantum dots by rapid thermal annealing
AU - Ellis, D. J. P.
AU - Stevenson, R. M.
AU - Young, R. J.
AU - Shields, A. J.
AU - Atkinson, P.
AU - Ritchie, D. A.
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Degeneracy of the bright single exciton spin state is a prerequisite for the production of triggered polarization-entangled photon pairs from the biexciton decay of a quantum dot. Normally, however, the exciton spin states are split due to in-plane asymmetries. Here the authors demonstrate that the exciton splitting of an individual dot can be tuned through zero by thermal annealing. Repeated annealing blueshifts the exciton emission line of the dot, accompanied by a reduction and inversion in polarization splitting. Annealing is also demonstrated to control the detuning between the exciton and biexciton transitions in any selected dot.
AB - Degeneracy of the bright single exciton spin state is a prerequisite for the production of triggered polarization-entangled photon pairs from the biexciton decay of a quantum dot. Normally, however, the exciton spin states are split due to in-plane asymmetries. Here the authors demonstrate that the exciton splitting of an individual dot can be tuned through zero by thermal annealing. Repeated annealing blueshifts the exciton emission line of the dot, accompanied by a reduction and inversion in polarization splitting. Annealing is also demonstrated to control the detuning between the exciton and biexciton transitions in any selected dot.
U2 - 10.1063/1.2430489
DO - 10.1063/1.2430489
M3 - Journal article
VL - 90
SP - -
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 1
M1 - 011907
ER -