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Defect Centers in Diamond for Quantum Applications: Prospects & Problems

March 4, 2013 - 12:30pm
Oliver Benson
Humboldt University, Berlin

Defect centers in diamonds have been studied extensively in the last years [1]. They represent single photon sources with stable operation even at room temperature. Additionally, their spin state provides a long decoherence time and can be controlled and read-out optically.
In this talk we focus on nitrogen vacancy (NV) centers in nanocrystalline diamond. First, we introduce basic properties of nanodiamonds and introduce a method to assemble fundamental nanophotonic devices [2]. Then, we report on a novel material platform based on direct laser writing in polymers which allows for fabrication of arbitrary three-dimensional quantum photonic structures [3].
In a second part of the talk we discuss decoherence of the electronic states in NV centers, which is crucial for possible applications in quantum information processing [4]. Finally, we show how a scanning probe can be functionalized with a nanodiamond to perform three-dimensional lifetime imaging with a single quantum emitter.

[1] F. Jelezko, and J. Wrachtrup, Phys. Stat. Sol. A 203, 3207 (2006); I. Aharonovich, A. D. Greentree and S. Prawer, Nature Phys. 5, 397 (2011).
[2] O. Benson, Nature 480, 193 (2011).
[3] A. W. Schell, et al., arXiv:1209.2036
[4] J. Wolters et al., Phys. Rev. Lett. 110, 027401 (2013); J. Wolters, et al., arXiv:1301.4544

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