Hannover 2013 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 39: Quantum effects: Light scattering and propagation

Q 39.2: Vortrag

Mittwoch, 20. März 2013, 14:15–14:30, F 342

Conservation of Energy in Coherent Backscattering of Light — •Angelika Knothe and Thomas Wellens — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg

We investigate the phenomenon of coherent backscattering of light, an interference effect that is observed when light propagates in disordered media in the presence of a boundary interface. Up to this day, it is not yet well-known what are the processes that allow this effect to occur without violating the law of conservation of total energy. [1]

We analyze in detail the processes at the origin of coherent backscattering as well as their relation to the mechanism that gives rise to the effect of weak localization. In the frame of a full description treating jointly these interference effects in random media, we are able to provide an explanation of the mechanism ensuring energy conservation.

[1] S. Fiebig et al., Europhys. Lett. 81 64004 (2008)