Berlin 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 44: Poster Session: Quantum Dots and Wires - Transport & Optical Properties

HL 44.12: Poster

Dienstag, 27. März 2012, 09:30–12:30, Poster D

Coherent coupling of quantum dots in a micropillar cavity — •Ferdinand Albert¹, Kanchana Sivalertporn², Jacek Kasprzak³, Micha Strauß¹, Christian Schneider¹, Sven Höfling¹, Martin Kamp¹, Alfred Forchel¹, Stephan Reitzenstein^1,4, Egor Muljarov², and Wolfgang Langbein² — ¹Technische Physik, Universität Würzburg, D-97074 Würzburg, Germany — ²School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA, UK — ³Institut Néel, CNRS et Université Joseph Fourier, F-38042 Grenoble, France — ⁴Present address: Institute of Solid State Physics, TU Berlin, D-10623 Berlin, Germany

Coherent coupling between distant quantum systems is a crucial topic in quantum information science and cavity quantum electrodynamics since it constitutes the basis for future quantum logic gates and networks. Within this context high quality optical microresonators containing quantum dots with individual exciton states have proven to be suitable candidates to study the strong light-matter coupling. In this work we report on the coherent coupling between three individually localized quantum dot excitons via the photonic mode of a micropillar resonator. This is demonstrated by means of two-dimensional spectroscopy of the sample’s coherent four-wave mixing response, where the coherent interaction can be controlled by tuning the cavity and exciton energies. Moreover, the experimental results are well reproduced in a quantitative theoretical model of the cavity mediated coupling of the excitons. Our results present a crucial step forward towards a quantum bus technology based on semiconductor photonic structures.