Coherence-polarization mixing in resonance gratings.
We show, using rigorous diffraction theory, that resonance gratings can be used to transfer partial spatial correlation to partial polarization even if the incident light beam is fully polarized. The phenomenon is based on the fact that either of the two orthogonal polarization components can be coupled into the leaky waveguide mode, leading to a strong phase delay, while the other one is reflected without being coupled into the grating. Numerical demonstrations are based on a Gaussian Schell-model beam and a grating analysis performed by rigorous Fourier modal method.
University of Eastern Finland, Department of Physics and Mathematics, Joensuu, Finland. ismo.vartiainen@uef.fi
Ismo
I
Vartiainen
Toni
T
Saastamoinen
Jani
J
Tervo
Markku
M
Kuittinen