Berlin 2015 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 35: Semiconductor laser
HL 35.4: Vortrag
Dienstag, 17. März 2015, 12:00–12:15, EW 203
Impact of nanomechanical resonances on the lasing of electrically pumped quantum dot micropillars — •Thomas Czerniuk1, Andrey Akimov2,5, Jan Tepper1, Sebastian Unsleber3, Christian Schneider3, Martin Kamp3, Sven Höfling4, Dmitri Yakovlev1,5, and Manfred Bayer1,5 — 1TU Dortmund, Dortmund, Germany — 2University of Nottingham, Nottingham, United Kingdom — 3University of Würzburg, Würzburg, Germany — 4University of St Andrews, St Andrews, United Kingdom — 5Ioffe Physical-Technical Institute, St. Petersburg, Russia
We use a picosecond acoustics technique to modulate the laser output of electrically pumped GaAs/AlAs micropillar lasers with InGaAs quantum dots. The modulation of the emission wavelength takes place on the frequencies of the nanomechanical extensional and breathing (radial) modes of the micropillars. The amplitude of the modulation for various nanomechanical modes is different for every micropillar which is explained by a various elastic contact between the micropillar walls and polymer environment.