Bayreuth 1998 – wissenschaftliches Programm

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CP: Chemische Physik

CP 6: Elektrische und optische Eigenschaften von organischen Materialien

CP 6.8: Poster

Montag, 9. März 1998, 18:00–20:00, P1

Generation and spectroscopic characterisation of color centers in bulk and nanocrystalline synthetic diamond and CVD diamond layers — •H.E. Wilhelm¹, R. Wannemacher¹, J. Teichert², and L. Bischoff² — ¹Institute of Physics, Chemnitz University of Technology, D-09107 Chemnitz — ²Institute of Ion Beam Physics and Materials Research, D-01314 Dresden

Due to their photophysical properties color centers in diamond are promising candidates for use as nanometric light sources in near-field optical microscopy. Such color centers have been generated by us by electron as well as ion beam irradiation in bulk synthetic diamond crystals, nanocrystalline diamonds, and CVD-diamond layers followed by thermal annealing. Different spectral characteristics have been found for various samples and are attributed to color centers reported in the literature, as well as to contributions from graphitic carbon. Low temperature spectra have been obtained for comparison. Emission profiles of color center structures generated by focussed ion beams have been obtained for various excitation wavelengths using a confocal microscope.