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Diamond Materials

Diamond Materials for Quantum Application

23. September 2014: The DFG research group FOR 1493 “Diamond Materials and Quantum Applications” goes into its second funding period. FOR1493 is a national research consortium funded by the Deutsche Forsch-ungsgemeinschaft.

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ERC Advanced Grant

ERC

Mapping Spin Coherence of a Single Rare-Earth Ion

Mapping Spin Coherence of a Single Rare-Earth Ion in a Crystal onto a Single Photon Polarization State

We report on optical detection of a single photostable Ce 3+ ion in an yttrium aluminium garnet (YAG) crystal and on its magneto-optical properties at room temperature. The spin quantum state of the emitting level of a single cerium ion in YAG can be initialized by circularly polarized laser pulse. Coherent precession of the electron spin is read out by observing temporal behaviour of circularly polarized fluorescence of the ion. This implies direct mapping of the spin quantum state of Ce 3+ ion onto the polarization state of the emitted photon and represents quantum interface between a single spin and a single photon.


Reference:
Mapping Spin Coherence of a Single Rare-Earth Ion in a Crystal onto a Single Photon Polarization State
Phys. Rev. Lett. 111, 120502 (2013)
Roman Kolesov, Kangwei Xia, Rolf Reuter, Mohammad Jamali, Rainer Stöhr, Tugrul Inal, Petr Siyushev, and Jörg Wrachtrup