Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 64: Nano-Optics III
Q 64.7: Vortrag
Freitag, 18. März 2022, 12:00–12:15, Q-H11
Nanoscopic Charge Fluctuations in a Gallium Phosphide Waveguide Measured by Single Molecules — •Alexey Shkarin1, Dominik Rattenbacher1,3, Jan Renger1, Simon Hönl2, Tobias Utikal1, Paul Seidler2, Stephan Götzinger3,1, and Vahid Sandoghdar1,3 — 1Max Planck Institute for the Science of Light, D-91058 Erlangen, Germany — 2IBM Research Europe, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland — 3Department of Physics, Friedrich Alexander University Erlangen-Nuremberg, D-91058 Erlangen, German
Nanometer-scale electric field fluctuations can shed light on material properties of technological interest such as crystal defects and charge distributions. However, nanoscopic characterization of these features is challenging because there exist not many probes that combine the necessary sensitivity, size, and vicinity to the location of interest. In our work [1], we study local electric field fluctuations via the Stark shift induced in single quantum emitters. Specifically, we examine the field at several points directly next to a GaP waveguide (< 50 nm away) using individual dibenzoterrylene molecules embedded in para-dichlorobenzene as nanoscopic probes. We discuss a series of experiments for investigating the spatial and temporal correlations of the electric field to confirm that the observed fluctuations originate in GaP and are photoinduced. Furthermore, we analyze the statistics of the fluctuations and show that it is consistent with fluctuations being induced by very few (< 50) charges jumping under the influence of light.
[1] A. Shkarin et al., Phys. Rev. Lett. 126, 133602 (2021)