Abstract

The dressed state basis provides an excellent insight into the features of a driven two level system [1], In this experiment, the two level systems in question are the magnetic transitions in diamond which have been shown to behave like an ideal two level atom. The magnetic (EPR) transition is detected by a coherent optical technique the details of which are given eleswhere, as is the experimental setup [2], This system is firstly dressed by a strong driving field, leading to the dressed state diagram (fig 1) and an A.C. “Stark splitting” is then clearly seen by monitoring with a weak probe. In addition a response is observed at the Rabi frequency (not shown). A discussion of the features of the Rabi transition in common with the ideal two level atom model is discussed elsewhere in this conference [3], The nominally forbidden transition at the Rabi frequency in the present experiment is then also strongly driven and the system is observed to be ‘dressed’ again, thus the original three peak spectrum at the EPR frequency in the neighbourhood of 80 MHz is split, leading to a prediction of a nine peak structure.

© 1996 Optical Society of America