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HL: Fachverband Halbleiterphysik

HL 13: Poster Session I

HL 13.71: Poster

Montag, 12. März 2018, 17:30–19:30, Poster B

Telecom wavelengths photonic crystal cavities: Simulation and Fabrication — •Lucas Rickert, Andrei Kors, Kerstin Fuchs, Johann Peter Reithmaier, and Mohamed Benyoucef — Institute of Nanostructure Technologies and Analytics (INA), CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

Telecom wavelengths InP-based photonic crystal (PhCs) cavities with embedded quantum dots (QDs) show interesting properties caused by the interaction between the atom-like behaviour of the QD and the degree of confinement of a spectrally and spatially suited cavity mode, leading to possible applications for long-distance quantum communication and quantum information processing.

This work focuses on the study of the influence of geometrical parameters on the quality factor enhancement, light out-coupling and the mode profiles of PhC cavities. Suitable PhC are designed using finite difference time domain (FDTD) simulations. The InP-based L3 PhC cavities are fabricated using electron beam lithography followed by reactive ion etching and wet etching of an underlying sacrificial layer resulting in free standing InP membranes containing QDs. The optical properties of the PhC cavities are examined via low temperature micro-photoluminescence spectroscopy (µ-PL) and exhibit sharp mode profiles at the telecom C-Band and enhanced exciton-biexciton single dot emission confirmed by excitation power dependent PL measurements. Temperature detuning experiments show a weak coupling behaviour.