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 Akimov^2,5, Jan Tepper¹, Sebastian Unsleber³, Christian Schneider³, Martin Kamp³, Sven Höfling⁴, Dmitri Yakovlev^1,5, and Manfred Bayer^1,5 — 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.