Branching ratio measurement of a "Lambda" system in Tm3+:YAG under magnetic field

Anne Louchet (1) , Jamil S. Habib (1) , Vincent Crozatier (1) , Ivan Lorgeré (1) , Fabienne Goldfarb (1) , Fabien Bretenaker (1) , Jean-Louis Le Gouët (1) , Olivier Guillot-Noël (2) , Philippe Goldner (2)

1 LAC - Laboratoire Aimé Cotton
2 LCMCP (site Paris VI) - Laboratoire de Chimie de la Matière Condensée de Paris (site Paris VI)

A three-level Lambda system in Tm3+ doped YAG crystal is experimentally investigated in the prospect of quantum information processing. Zeeman effect is used to lift the nuclear spin degeneracy of this ion. In a previous paper [de Seze et al. Phys. Rev. B, 73, 85112 (2006) we measured the gyromagnetic tensor components and concluded that adequate magnetic field orientation could optimize the optical connection of both ground state sublevels to each one of the excited state sublevels, thus generating Lambda systems. Here we report on the direct measurement of the transition probability ratio along the two legs of the Lambda. Measurement techniques combine frequency selective optical pumping with optical nutation or photon echo processes.

Mots clés: coherent optical processes; rare earth ion doped crystal; quantum information

Domaines: Physique Quantique [quant-ph]

Anne Louchet, Jamil S. Habib, Vincent Crozatier, Ivan Lorgeré, Fabienne Goldfarb, et al.. Branching ratio measurement of a "Lambda" system in Tm3+:YAG under magnetic field. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2007, 75, pp.35131. ⟨10.1103/PhysRevB.75.035131⟩. ⟨hal-00078638v2⟩