Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 13: Poster Session I
HL 13.76: Poster
Monday, March 12, 2018, 17:30–19:30, Poster B
Optical properties of highly excited CuI based microwire cavities — •Evgeny Krüger1, Marcel Wille1, Steffen Blaurock1, Vitaly Zviagin1, Rafael Deichsel1, Gabriele Benndorf1, Volker Gottschalch2, Harald Krautscheid2, Rüdiger Schmidt-Grund1, and Marius Grundmann1 — 1Universität Leipzig, Felix-Bloch-Institut für Festkörperphysik, Linnéstr. 5, Leipzig — 2Universität Leipzig, Institut für Anorganische Chemie, Johannisallee 29, Leipzig
We present the first experimental results for lasing in cuprous iodide (CuI) microwire cavities. The microwires with diameter of (2 – 20) µm were grown by vapor-phase transport method in a three-zone furnace with a linear temperature profile between (250 – 450)∘C. The microwire crystal structure, chemical composition as well as morphology were evaluated using X-ray diffraction, energy dispersive X-ray spectroscopy and scanning electron microscopy, respectively. The observed excitonic photoluminescence emission lines as well as formation of gain under high optical excitation indicate high optical quality of the investigated microwires. The analysis of the spectral mode positions suggests that the microwires with a triangular cross-section act as whispering-gallery type resonators. Time-resolved micro-photoluminescence studies reveal the dynamics of the laser process on the picosecond time scale.
[1] M. Wille et al., Appl. Phys. Lett. 111, 031105 (2017)