SKM 2021 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 8: Poster Session II
HL 8.18: Poster
Dienstag, 28. September 2021, 10:00–13:00, P
Optimal Bandwidth in Quantum Event Measurements Using Post-Processing — •Jens Kerski1, Hendrik Mannel1, Pia Lochner1, Eric Kleinherbers1, Annika Kurzmann2, Arne Ludwig3, Andreas D. Wieck3, Jürgen König1, Axel Lorke1, and Martin Geller1 — 1Faculty of Physics and CENIDE, University of Duisburg-Essen, Germany — 22nd Institute of Physics, RWTH Aachen University, Germany — 3Chair of Applied Solid State Physics, Ruhr-University Bochum, Germany
The realization of novel applications, such as quantum computing or quantum sensing, is largely limited by the time resolution and accuracy with which individual quantum events can be measured. For the measurement of single electron tunneling, radio-frequency single-electron transistors and quantum point contacts have been the most successful detection methods. A promising alternative to this is to exploit an optical transition. For this purpose, resonance fluorescence of the excitonic transition is detected at 4.2 K from a self-assembled quantum dot embedded in a tailored diode structure.
In this work, we use single photon signal post-processing to identify the optimal time resolution for the analysis of our data. We show how the bandwidth affects both the determination of the tunneling rates and the statistical evaluation by full counting statistics, and demonstrate that we can evaluate our data with sampling rates up to 340 kHz. Using a simple model, we discuss the limiting factors for reaching the highest time resolution and propose how a time resolution of more than 1 MHz could be achieved.