Nonlinear Optical Effects in Hydrogenated Amorphous Silicon Wire Waveguides
Date | Mi, 07.03.2012 | |
Time | 10.15 | |
Speaker | Edoardo Baldini, Faculty of Engineering, University of Pavia, Italy | |
Location | Universität Bern, Institut für Angewandte Physik, Gebäude exakte Wissenschaften, Hörsaal B78, Sidlerstrasse 5, 3012 Bern | |
Program | Hydrogenated amorphous silicon (a-Si:H) is increasing its role as a promising material for the CMOS-compatible fabrication of optical waveguides in silicon photonics, as it allows more efficient nonlinear interactions than crystalline silicon. We want to investigate the ultrafast optical nonlinear response of a-Si:H wire waveguides using heterodyne pump- probe measurements, evaluating the cross-absorption and the cross-phase modulation and calculating the two-photon absorption figure of merit of the waveguides. Furthermore, we aim at describing the material degradation that can be observed after prolonged exposition of the waveguides to high-power laser radiation. | |
Link | www.iap.unibe.ch |