Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 25: Poster 1

HL 25.73: Poster

Mittwoch, 7. September 2022, 18:00–20:00, P2

Calibrating Photoluminescence Yield for Quantum Emitters in Planar Photonic Heterostructures — •Timo Kruck, Hans-Georg Babin, Danial Kohminaei, Sayed Sadat, Andreas D. Wieck, and Arne Ludwig — Ruhr-Universität-Bochum; Lehrstuhl für angewandte Festkörperphysik, Bochum, Deutschland

When performing photoluminescence (PL) measurements, the spectral intensity of the emitted radiation strongly depends on the dielectric structure sourrounding the quantum emitter. Here we show a method for calibrating PL measurements to obtain the unaltered spectrum of the optically active medium. For this purpose, the spectral reflectivity and the wavelength dependent standing wave field are used. The reflectivity is determined by reflectometer measurements and a simulation based on the transfer matrix method are used to compensate for the true layer thickness. This is then used to calculate the standing wave field, the outcoupling efficiency and the quantum yield. To validate the method, the calibrated spectra are compared with cleaved-edge PL measurements where the QDs are excited from the side and the light is also collected from the side.