Regensburg 2019 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 35: HL Poster II

HL 35.42: Poster

Wednesday, April 3, 2019, 17:30–20:00, Poster E

Optimized metamorphic buffer heterointerfaces for λ = 1.55 μm quantum dot growth — •Marcel Schmidt, Tim Bergmeier, Andreas D. Wieck, and Arne Ludwig — Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum

Quantum dots emitting at the wavelength of 1550 nm are a key technology for future optical fibre transmitted quantum information exchange. At this wavelength, the attenuation in the optical fibre has an absolute minimum. Self assembled quantum dots (SAQDs) are very promising as nearly ideal sources for single indistinguishable photons or entgenled photon pairs which can be used for quantum information purposes like quantum key distribution or quantum repeaters. To shift the energy levels of SAQDs to an emission wavelength of 1550 nm, we investigate molecular beam epitaxy - grown InAs SAQDs on lattice-mismatch reduced InGaAs/InAlAs heterostructure layers with short period superlattices. We present first results of SAQDs already emitting at 1550 nm in photoluminescence spectroscopy at the temperature of T = 77 K.