- High phase retardation by waveguiding in slanted photonic nanostructuresKalle Ventola
University of Eastern Finland, Department of Physics and Mathematics, Joensuu, Finland
Opt Express 19:241-6. 2011..We present physical principle, numerical analysis of the phenomenon and designs for half-wave retarders. As an experimental result, a slanted grating producing 177 degrees retardation and 95.5% efficiency is presented...
- High efficiency half-wave retardation in diffracted light by coupled wavesKalle Ventola
Department of Physics and Mathematics, University of Eastern Finland, P O Box 111, FI 80101 Joensuu, Finland
Opt Express 20:4681-9. 2012..We present an experimental result with 58.9 % diffraction efficiency and a near perfect half-wave retardation. We explain the effect qualitatively using the classical coupled-wave approach...