Heinz Spahni

Design of materials for molecular computing

The fidelity of direct image correlation depends on the properties of the recording material. Results of plane wave interference are shown for oriented samples as well as polymer films. Also diffraction properties of holograms stored in frequency selective recording media are considered.

Phase-matched second-harmonic generation in planar waveguides

Using a planar, linear, waveguide second-harmonic generation was observed by nonlinear evanescent field interaction. In this class of devices phase-matching could be achieved with a periodically structured polymer adsorbate.