Dressed State Nutation and Dynamic Stark Switching

Abstract

Using Raman heterodyne detected nuclear magnetic transition in diamond we have observed dressed state nutation for two situations: (i) pulsed probe + cw pump and (ii) cw probe + pulsed pump. The dressed state Rabi frequencies are measured for the first time and found to have a $sin\ensuremath{\theta}$ and $cos\ensuremath{\theta}$ dependence ($\ensuremath{\theta}$ is a function of pump intensity and detuning). A simple consideration based on the dressed state model gives a satisfactory account of the observed dependence. When a 90\ifmmode^\circ\else\textdegree\fi{} phase shift is introduced, spin locking and strong oscillations are observed.