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HL: Fachverband Halbleiterphysik

HL 108: Poster: Ultra-fast phenomena / Optical properties / Semiconductor laser / Devices and device concepts

HL 108.12: Poster

Donnerstag, 3. April 2014, 17:00–20:00, P1

Time-resolved spectroscopy of defect luminescence in aluminium nitride — •Tristan Koppe, Oliver Beck, Hans Christian Hofsäss, and Ulrich Vetter — II. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

We report on defect luminescence studies in HPHT synthesized or epitaxial grown aluminium nitride. The samples are excited with a femtosecond laser system at various UV-wavelengths and the luminescence is collected with a Streak Camera in the wavelength range of 200-800 nm at different time scales with a temporal resolution up to 20 ps. A special focus is drawn on the temperature dependence of intensity and lifetime in a range between 12 K and room temperature.