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Research group J. Evers – Division C. H. Keitel
Abstract:
This thesis addresses the question if and how energy is conserved in optical systems with Fano
spectral line shape control. The focus is mainly set on the dynamics of two - and three level atoms.
To investigate the time dependent energy distribution in these systems, a semiclassical version of
the well known Poynting vector from Classical Electrodynamics has been derived. Furthermore, a
transition from one irradiated atom to many atoms has been implemented to simplify the expression
for the scattered electromagnetic eld, enabling us to perform energy calculations for laser pulses
as well. Thus, Fano control can be realised in a three-level system via a probe - and control pulse.
Doing so, it is possible to show that energy is indeed conserved in systems with Fano control. In fact,
the energy in the spectral line is just being redistributed. Additionally, it has been observed that an
overlap between probe - and control pulse leads to a manipulation of the scattering behaviour of the
atom, without breaking energy conservation.
