Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 49: Poster – Photonics, Lasers, and Applications

Q 49.18: Poster

Mittwoch, 12. März 2025, 17:00–19:00, Tent

Nonlinear Spectroscopy of CdTeSe/ZnS Quantum Dots in a Single-Photon Fluorescence-Microscopy Setup — •Raphael Wichary and Tobias Brixner — Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany

We present measurements on commercial CdTeSe/ZnS core–shell quantum dots in a single-photon fluorescence microscope. Different methods of sample preparation, as well as the influence of oxygen and the excitation power on the stability of the sample in two-dimensional electronic spectroscopy experiments are explored. Comparisons are made between the behavior of clusters of multiple quantum dots and single quantum dots.
Different techniques are tried out to eliminate higher-order contamination of nonlinear signals.

Keywords: Fluorescence Microscopy; Single Photons; Quantum Dots