Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 57: Photonic Crystals II

HL 57.4: Vortrag

Mittwoch, 28. März 2012, 12:45–13:00, EW 202

Light-Mediated Coupling of a Single QD Coupled to Strongly Interacting Planar Photonic Crystal Cavities — •Stefan Declair, Torsten Meier, and Jens Förstner — University of Paderborn, Department of Physics and CeOPP, Warburger Str. 100, D-33098 Paderborn, Germany

We numerically investigate the light-mediated coupling between a semiconductor heterostructure, a quantum dot (QD), and strongly interacting planar photonic crystal cavities (PhCCs) using a Finite-Difference Time-Domain method. The light-matter Hamiltonian is used to calculate the macroscopic polarization via dynamic equations of motion for the interband coherence and density of the QD [1].
The photonic system consists of two strongly interacting L3 cavities with an optimized Q-factor [2], exhibiting an asymmetric line splitting of >600 GHz [3]. Resonant coupling of a QD (phenomenological dephasing rate in the GHz regime) to one photonic eigenmode of the coupled PhCC system leads to emission of the QD on the other photonic eigenmode with a strong coupling signature (normal mode splitting).
C. Dineen et al., Electromagnetic field structure and normal mode splitting in photonic crystal nanocavities, Optics Express 13, 4980 (2005).
Y. Akahane et al., High-Q photonic nanocavity in a two-dimensional photonic crystal, Nature 425, 944 (2003).
S. Declair et al., Numerical Analysis of Coupled Photonic Crystal Cavities, Photonics and Nanostructures: Fundamentals and Applications 9, 345-350 (2011).