Copyright by Kirsten Viering 2006 - Raizen Lab - The University of ...

The scheme for a Resonant Raman transition looks fairly similar, as can be seen
in fig. 5.2. Instead of a resonant one-photon transition a resonant two-photon transition
occurs. Two frequencies ω1 and ω2 are combined into one excitation pulse, where the
difference frequency ω = ω1 − ω2 equals the differency frequency between the initial
and the final state. Both frequencies, ω1 and ω2 are off-resonant; the detuning to the
intermediate level |I〉 is given by ∆.
Figure 5.2: Simplified scheme of a resonant Raman transition with spatial resolution;the
resonance frequency is space-dependant. For simplicity we have assumed that only
the final state | f 〉 is dependant on the magnetic field. The two frequencies ω1 and ω2
are off-resonance with an intermediate level |I〉. The detuning is given by ∆.
5.2 Limitations for spatially resolved Raman transitions
In the following section we want to present the fundamental limits for spatially resolved
Raman transitions [22]. In addition to considering the spectral resolution, we must also
26