Controlling the exciton energy of a nanowire quantum dot by strain fields

We present an experimental route to engineer the exciton energies of single quantum dots in nanowires. By integrating the nanowires onto a piezoelectric crystal, we controllably apply strain fields to the nanowire quantum dots. Consequently, the exciton energy of a single quantum dot in the nanowire...

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Bibliographic Details
Published in:Applied physics letters 2016-05, Vol.108 (18)
Main Authors: Chen, Yan, Zadeh, Iman Esmaeil, Jöns, Klaus D., Fognini, Andreas, Reimer, Michael E., Zhang, Jiaxiang, Dalacu, Dan, Poole, Philip J., Ding, Fei, Zwiller, Val, Schmidt, Oliver G.
Format: Article
Language:English
Subjects:
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CORRELATIONS
CRYSTALS
Data processing
Emitters
Excitons
IMPURITIES
MULTI-PHOTON PROCESSES
NANOWIRES
PHOTON EMISSION
PHOTONS
Piezoelectric crystals
PIEZOELECTRICITY
QUANTUM DOTS
QUANTUM INFORMATION
Quantum phenomena
Quantum theory
STRAINS
Time lag
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Summary:We present an experimental route to engineer the exciton energies of single quantum dots in nanowires. By integrating the nanowires onto a piezoelectric crystal, we controllably apply strain fields to the nanowire quantum dots. Consequently, the exciton energy of a single quantum dot in the nanowire is shifted by several meVs without degrading its optical intensity and single-photon purity. Second-order autocorrelation measurements are performed at different strain fields on the same nanowire quantum dot. The suppressed multi-photon events at zero time delay clearly verify that the quantum nature of single-photon emission is well preserved under external strain fields. The work presented here could facilitate on-chip optical quantum information processing with the nanowire based single photon emitters.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4948762