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

Journal article (2016)

Authors

Yan Chen IFW Dresden
I.Z. Esmaeil Zadeh QN/Zwiller Lab
Oliver G. Schmidt IFW Dresden, Technische Universität Chemnitz
K.D. Jöns QN/Quantum Nanoscience
A.W. Fognini QN/Zwiller Lab
Michael E. Reimer University of Waterloo
Jiaxiang Zhang IFW Dresden
Dan Dalacu National Research Council Canada
Philip J. Poole National Research Council Canada
Fei Ding IFW Dresden
V.G. Zwiller QN/Zwiller Lab
Research Group
QN/Zwiller Lab
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Published Date

02-05-2016

Language

English

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Research Group

QN/Zwiller Lab

Abstract

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.