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Solid State Sciences

Optical investigation of nuclear spin coherence in Tm:YAG

Anne Louchet-Chauvet, Y. Le Du, T. Brouri, Fabien Bretenaker, T. Chanelière, Fabienne Goldfarb, I. Lorgeré, J.-L. Le Gouët

Published Jan 2, 2008• 2 citations
Publisher
DOI
10.1016/j.solidstatesciences.2007.12.029

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In low-concentration Tm3+{}^{3+}3+:YAG, we observe efficient adiabatic rapid passage (ARP) of thulium nuclear spin over flipping times much longer than T2{T}_{2}T2​. Efficient ARP with long flipping time has been observed in monoatomic solids for decades and has been analyzed in terms of spin temperature and of the thermodynamic equilibrium of a coupled spin ensemble. In low-concentration impurity-doped crystals the spin temperature concept may be questioned. A single spin model should be preferred since the impurity ions are weakly coupled together but interact with the numerous off-resonant matrix ions that originate the spin-spin relaxation. The experiment takes place in the context of quantum information investigation, involving impurity-doped crystals, spin hyperpolarization by optical pumping, and optical detection of the spin evolution.