Spin Echo at the Rabi Frequency in Solids

Abstract
We report on the observation of spin echo signals at the generalized Rabi frequency of a strongly driven two level system. The results are obtained for a radio-frequency transition of the nitrogen-vacancy center in diamond. A physical picture of the experiment is given in terms of the dressed-state basis, and the echo decay results are analyzed semiclassically and found to be in excellent agreement with our transient solution to the generalized Bloch equations.

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