Dresden 2020 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 64: Poster II

HL 64.5: Poster

Donnerstag, 19. März 2020, 10:00–13:00, P1A

Nanowire lasers modified by electron irradiation — Gesine Theeß, •Francesco Vitale, Maximilian Zapf, and Carsten Ronning — Institute of Solid State Physics, Friedrich Schiller Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany

Understanding the linear and nonlinear optical properties of semiconductor nanowires (NWs) is crucial for their envisaged integration into next-generation optoelectronic devices. In this work, the emission of optically pumped VLS-grown ZnO NW lasers was examined in situ in a cathodoluminescence apparatus as a function of the electron beam irradiation. A contrasting behavior between measurements in the spontaneous and stimulated emission regime was found: the spontaneous emission shows a distinct maximum after several minutes of irradiation, followed by a substantial decrease before saturation, while the stimulated emission decreases monotonically. In particular, the influence of defects was studied in relation to the modification of the optical and electronic properties induced by the electron beam.