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HL: Fachverband Halbleiterphysik

HL 49: Quantum dots and wires II

HL 49.10: Talk

Wednesday, March 18, 2020, 17:45–18:00, POT 151

High-precision determination of Silicon nanocrystals — •Ronja Köthemann, Nils Weber, Jörg K. N. Lindner, and Cedrik Meier — Universität Paderborn, Deutschland

Silicon nanocrystals have atom-like discrete energy levels and exhibit strong luminescence in the visible spectral range. However, for particles embedded in a host matrix, size determination is challenging when the nanocrystals are smaller than 5 nm in diameter. Therefore, we evaluate different approaches to determine the size of the silicon nanocrystals. The nanocrystals are fabricated using a plasma-enhanced chemical vapor deposition (PECVD) process with subsequent annealing in a tube furnace. For characterization, different experimental techniques are used, including optical measurements such as photoluminescence or nonlinear optical response and analytical transmission electron microscopy. Furthermore, preliminary results for integrating the nanocrystals into photonic crystal disks are shown.