Electromagnetic induced transparency using dressed states
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Summary form only given. Observations of electromagnetic induced transparency have been reported for many three bare atomic level systems. In the present work EIT is reported for an entirely different three level scheme where the levels are associated with dressed states. The three dressed levels | 1d >, | 2 d >, | 3 d > are generated from a conventional two level system | 1 >, | 2 > by coupling one of the levels to a third remote level, | 3 > using a strong driving field ωd. The dressed state EIT phenomenon is observed for spin state transitions in a nitrogen-vacancy colour centre in diamond with all fields in the rf region of the electromagnetic spectrum although measurements involve optical detection.