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HL: Halbleiterphysik
HL 8: Photonische Kristalle II
HL 8.2: Talk
Monday, March 8, 2004, 15:30–15:45, H15
Doping of colloidal photonic crystals — •Bettina Friedel1, Bettina Friedel1, Siegmund Greulich-Weber1, Carsten Blum2, Heinrich Marsmann2, Siegmund Greulich-Weber1, Carsten B lum2, and Heinrich Marsmann2 — 1Fakultaet fuer Naturwissenschaften, Department Physik, Universitaet Paderborn, Warburger Str. 100, DE-33098 Paderborn — 2Fakultaet fuer Naturwissenschaften, Department Chemie, Universitaet Paderborn, Warburger Str. 100, DE-33098 Paderborn
Photonic crystals based on colloidal crystals grown from monodisperse spherical silica particles have received considerable attention in the recent years. To increase the relatively low refraction index contrast concerning to air, many different techniques were proposed: for example coating the silica spheres with dyes or doping with II-VI compound semiconductors. For the implementation of photonic devices, like optical waveguides or microcavities, it is necessary to change the refractive index of single spheres in order to create point and line defects in the colloidal crystal. Procedures are presented which allow a local doping of photonic crystals using established silicon technology. Basic results on doping possibilities and change of the optical properties are given.