Dresden 2014 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 54: Quantum light sources based on solid state systems: Status and visions II (Focus session with TT)

HL 54.6: Talk

Tuesday, April 1, 2014, 15:30–15:45, POT 251

Integrated quantum optics in coupled quantum-dot micropillar cavities — •Pierce Munnelly¹, Ferdinand Albert², Matthias Lermer², Tobias Heindel², Christian Schneider², Sven Höfling^2,3, Martin Kamp², and Stephan Reitzenstein¹ — ¹Institute of Solid State Physics, Technische Universität Berlin, D-10623 Berlin, Germany — ²Technische Physik, Universität Würzburg, D-97074 Würzburg, Germany — ³present address: University of St Andrews, North Haugh, KY16 9SS United Kingdom

The development of novel concepts for integrated photonics has become an area of intensive research in the field of semiconductor nanotechnology. The overall goal is to integrate light sources, waveguides, non-linear optical elements and detectors into compact and externally controllable optical networks. Up till now, most approaches for integrated nanophotonics have relied on planar waveguide structures and photonic crystal membranes, where the integration of active and passive areas on the same chip or the definition of electrical contacts is challenging. In an alternative approach for ’free space’ integrated optics we take advantage of the fact that electrically contacted micropillar cavities allow for efficient in-plane emission of light via whispering gallery modes. Using this very appealing feature, we demonstrate that electrically driven micropillar lasers can act as integrated light sources to perform cavity quantum electrodynamics experiments in laterally coupled micropillar cavities. Moreover, electrical contacts at the coupled micropillars allow for resonance tuning using the quantum confined Stark effect and for integrated light detection via on-chip photocurrent measurements.