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Ultrafast spin dynamics in colloidal ZnO quantum dots

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2008

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Janßen, Nils
Gamelin, Daniel R.

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Published

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Nano Letters. 2008, 8(7), pp. 1991-1994. Available under: doi: 10.1021/nl801057q

Zusammenfassung

Time-resolved Faraday rotation measurements in the ultraviolet have been performed to reveal the ultrafast spin dynamics of electrons in colloidal ZnO quantum dots. Oscillating Faraday rotation signals are detected at frequencies corresponding to an effective g factor of g* = 1.96. Biexponential oscillation decay is observed that is due to (i) rapid depopulation of the fundamental exciton (τ = 250 ps) and (ii) slow electron spin dephasing (T2* = 1.2 ns) within a metastable state formed by hole-trapping at the quantum dot surface.

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ISO 690JANSSEN, Nils, Kelly M. WHITAKER, Daniel R. GAMELIN, Rudolf BRATSCHITSCH, 2008. Ultrafast spin dynamics in colloidal ZnO quantum dots. In: Nano Letters. 2008, 8(7), pp. 1991-1994. Available under: doi: 10.1021/nl801057q
BibTex
@article{Janen2008Ultra-916,
  year={2008},
  doi={10.1021/nl801057q},
  title={Ultrafast spin dynamics in colloidal ZnO quantum dots},
  number={7},
  volume={8},
  journal={Nano Letters},
  pages={1991--1994},
  author={Janßen, Nils and Whitaker, Kelly M. and Gamelin, Daniel R. and Bratschitsch, Rudolf}
}
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