Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 30: Poster: Quantum dots and wires: Preparation, characterization, optical properties and transport

HL 30.18: Poster

Montag, 31. März 2014, 17:00–20:00, P2

Simulation and characterisation of an integrated optical beamsplitter based on multimode GaAs/AlAs waveguides with embedded InGaAs/GaAs quantum dots — •Markus Oster1, Ulrich Rengstl1, Klaus D. Jöns1,2, Samir Bounouar1, Sven M. Ulrich1, Michael Jetter1, and Peter Michler11Institut für Halbleiteroptik und Funktionelle Grenzflächen, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany — 2Kavli Institute of Nanoscience Delft, Quantum Transport, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands

The miniaturization and high-density integration of electronic logic elements into single chip architecture has been a revolutionary development for electronic data processing in the past decades. Nevertheless, in the future perspective to create novel all-optical types of quantum logic structures, the integration of tailored quantum emitters as non-classical light sources into dedicated optical waveguide structures is one of the major aims of research in this field.

Here we report on investigations on multimode GaAs/AlAs waveguides using integrated single InGaAs/GaAs quantum dots as light sources to study the light propagation and beamsplitter operation of the waveguide structures. Our studies reveal waveguide losses of α = 15.7   cm−1, wavelength-dependent beamsplitter ratios around 0.5/0.5, and a photon polarisation of over 90 %. These results represent an important step towards the realization of semiconductor based integrated photonic quantum circuits.

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