Tunable multiphoton Rabi oscillations in an electronic spin system

Abstract : We report on multiphoton Rabi oscillations and controlled tuning of a multilevel system at room temperature (S = 5/2 for Mn 2+ :MgO) in and out of a quasiharmonic level configuration. The anisotropy is much smaller than the Zeeman splittings, e.g., the six-level scheme shows only a small deviation from an equidistant diagram. This allows us to tune the spin dynamics by compensating for the cubic anisotropy with either a precise static-field orientation or a microwave field intensity. Using the rotating-frame approximation, the experiments are explained very well by both an analytical model and a generalized numerical model. The calculated multiphoton Rabi frequencies are in excellent agreement with the experimental data.
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Physical Review B : Condensed matter and materials physics, American Physical Society, 2011, 84 (13), pp.134433-1-134433-8. 〈10.1103/PhysRevB.84.134433〉
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Sylvain Bertaina, Irinel Chiorescu, N. Groll, Lei Chen. Tunable multiphoton Rabi oscillations in an electronic spin system. Physical Review B : Condensed matter and materials physics, American Physical Society, 2011, 84 (13), pp.134433-1-134433-8. 〈10.1103/PhysRevB.84.134433〉. 〈hal-01699824〉

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