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HL: Fachverband Halbleiterphysik

HL 57: Photonic Crystals II

HL 57.5: Vortrag

Mittwoch, 28. März 2012, 13:00–13:15, EW 202

High and Subharmonic Generation with a Semiconductor Quantum dot in a Photonic Crystal Cavity — •Matthias Reichelt¹, Andrea Walther², and Torsten Meier¹ — ¹Department of Physics and CeOPP, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany — ²Institut für Mathematik, Universität Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany

A semiconductor quantum dot modeled as two-level system can emit radiation at specific high harmonic frequencies if it is excited with an intense properly shaped laser pulse [1,2]. Here, we show that it is also possible to downconvert the emission below the fundamental frequency. This proves useful when a dot which is placed into a photonic crystal is capable of emitting into an off-resonant cavity mode in the photonic band gap. Numerical calculations are performed with an optimization algorithm [3] plus a FDTD-simulation.

[1] M. Reichelt, A. Walther, and T. Meier, J. Opt. Soc. Am. B, accepted for publication.
[2] D. Golde, T. Meier, and S.W. Koch, J. Opt. Soc. Am. B, 23, 2559 (2006).
[3] M. Reichelt, A. Walther, and T. Meier, Photonics and Nanostructures - Fundamentals and Applications 9, 328 (2011).