Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 43: Poster Session: Quantum Dots and Wires - Preparation and Characterization / Devices (incl. Laser) / Ultrafast Phenomena

HL 43.25: Poster

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

From bistability to break-down of normal-mode splitting in microcavity systems — •Regina Kruse, Stefan Declair, Jens Förstner, and Stefan Schumacher — Physics Department and Center for Optoelectronics and Photonics Paderborn (CeOPP), Universität Paderborn, Paderborn, Germany

We study the nonlinear excitation dynamics of a microcavity system with normal mode splitting. Our model includes a single optical cavity mode coupled to an electronic two-level system. The results from the corresponding Maxwell-Bloch equations are compared to a full 3D FDTD calculation [1]. In agreement with earlier studies [2] we observe bistable behaviour for continuous wave excitation while scanning the frequency range around the resonances with the pump. Additionally to this steady-state behaviour we explicitly study the nonlinear system dynamics in time. With this method we are able to analyze the transition from nomal-mode splitting to bistable behaviour until the strong coupling regime breaks down for high excitation densities.

[1] S. Declair, X. Song, T. Meier and J. Förstner: Simulation of Mutual Coupling of Photonic Crystal Cavity Modes and Semiconductor Quantum Dots *AIP Conf. Proc. 1398, 123 (2011). [2] J. Gripp, S. Mielke and L. Orozco: Evolution of the vacuum Rabi peaks in a detuned atom-cavity system *Phys. Rev. A56, 3262 (1997).