Dr. Sven Heumann
 Mittwoch, 15:00  16:30 Uhr und nach Vereinbarung
 AllianzGebäude (05.20)
 4C02
 0721 60846469
 sven.heumann@kit.edu

Kaiserstraße 8993
76133 Karlsruhe
Welcome to my homepage!
Research
I'm interested in inverse scattering problems for electromagnetic waves in chiral media. This includes the solvability study of the direct problem: An incoming wave hits a chiral scatterer. As result a scattered field is produced. The inverse problem I'm dealing with consists in reconstructing the scatterer from the far field data. In order to solve this inverse problem I want to adapt the factorization method.
scattering object 
Herglotz function 

Chirality
In geometry, a figure is chiral if it cannot be mapped to its mirror image by rotations and translations alone. In chemistry, chirality usually refers to molecules. Two mirror images of a chiral molecule are called enantiomers.
The two enantiomers of a generic amino acid
Chiral material is optically active: It rotates plane polarized light and left and rightcircularly polarized waves propagate with different phase velocities. Wave propagation in chiral media is governed by Maxwell's equations and the DrudeBornFedorov equations (constitutive relations).
Maxwell's equations
Consider the time harmonic case with frequency . Then wave propagation in chiral media is governed by the following equations with electric permittivity , magnetic permeability and chirality :
The difference to the achiral case is in the parameter , which adds links between the electric induction and the curl of the electric field and between the magnetic induction and the curl of the magnetic field .