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HL: Halbleiterphysik

HL 4: Photonische Kristalle

HL 4.9: Vortrag

Montag, 11. März 2002, 12:30–12:45, H15

Microreplicated organic photonic crystal lasers — •J. Crewett¹, S. Riechel¹, U. Lemmer¹, J. Feldmann¹, K. Busch², U. Scherf³, A. Gombert⁴, and V. Wittwer⁴ — ¹Lehrstuhl für Photonik und Optoelektronik, Ludwig-Maximilians-Universität München — ²Institut für Theorie der kondensierten Materie, Universität Karlsruhe — ³Lehrstuhl für Polymerchemie, Universität Potsdam — ⁴Fraunhofer Institut für Solare Energiesysteme ISE, Freiburg

Surface relief gratings prepared by holographic exposure and subsequent microreplication offer a large area/low cost approach for producing 2D photonic crystals. It has already been demonstrated that a combination of UV-embossed nanostructures with optically amplifying organic semiconductors opens a novel route to large area photonic crystal lasers. The emission spectra of such lasers are discussed in terms of the underlying photonic bandstructures. Methods to engineer the bandgap and to introduce defects by oblique evaporation of high refractive index materials and the controlled deposition of colloidal particles are investigated. These structures are decorated with organic semiconductors and the resulting laser properties are investigated.