Sub-Wavelength Multi-Channel Imaging Using a Solid Immersion Lens: Spectroscopy of Excitons in Single Quantum Dots

K. P. Hewaparakrama; S. Mackowski; H. E. Jackson; L. M. Smith; G. Karczewski; J. Kossut

doi:10.1063/1.1829169

Sub-Wavelength Multi-Channel Imaging Using a Solid Immersion Lens: Spectroscopy of Excitons in Single Quantum Dots

Other Condensed Matter 2009-11-10 v1

Authors: K. P. Hewaparakrama , S. Mackowski , H. E. Jackson , L. M. Smith , G. Karczewski , J. Kossut

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Abstract

We demonstrate sub-wavelength imaging of excitons confined to single CdTe quantum dots. By combining slit-confocal microscopy with a hemispherical solid immersion lens we simultaneously map the emission of thousands of single quantum dots with a spatial resolution of 400 nm. By analyzing the linear polarization of the quantum dot emissions at B=0T, we find that the distribution of the exchange splitting is centered at zero with a standard deviation of 0.34 meV. Similar experiments performed at B=3T give an average value of the exciton effective g factor of 3.1. This experimental approach provides an effective means to gain statistical information about the quantum dot exciton fine structure in the ensemble.

Keywords

sub-wavelength imaging solid immersion lens quantum dot excitons exchange splitting fine structure spectroscopy

Cite

@article{arxiv.cond-mat/0408545,
  title  = {Sub-Wavelength Multi-Channel Imaging Using a Solid Immersion Lens: Spectroscopy of Excitons in Single Quantum Dots},
  author = {K. P. Hewaparakrama and S. Mackowski and H. E. Jackson and L. M. Smith and G. Karczewski and J. Kossut},
  journal= {arXiv preprint arXiv:cond-mat/0408545},
  year   = {2009}
}

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12 pages, 3 figs - submitted for publication

Sub-Wavelength Multi-Channel Imaging Using a Solid Immersion Lens: Spectroscopy of Excitons in Single Quantum Dots

Abstract

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