Dresden 2011 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 85: Poster Session II

HL 85.7: Poster

Thursday, March 17, 2011, 18:00–21:00, P4

Crossed Photonic Crystal Waveguides for Quantum Dots Signal Detection — •Xiaohong Song, Torsten Meier, and Jens Förstner — Department Physik and Center for Optoelectronics and Photonics Paderborn (CeOPP), Universität Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany

Separation of typically very weak quantum dot signals from the exciting laser light is important for the investigation of the excitation dynamics of quantum dots. Using a combined Maxwell-Bloch approach[1], we theoretically investigate a crossed perpendicular photonic crystal waveguide structure to achieve this aim[2]. The waveguides are designed so that the light can only propagate along one direction and is forbidden in the other directions. When the quantum dots are embedded in this structure, the nearly pure quantum dot signal can be detected in the transverse direction.

[1] C. Dineen, J. Förstner, A.R. Zakharian, J.V. Moloney, S.W. KochOptics Express 13, 4980 (2005).

[2] S. G. Johnson, C. Manolatou, S. Fan, P. R. Villeneuve, J. D. Joannopoulos, H. A. Haus, Opt. Lett. 23, 1855 (1998).