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HL: Fachverband Halbleiterphysik

HL 57: Quantum Dots and Wires: Optics II

HL 57.5: Vortrag

Freitag, 21. März 2025, 10:30–10:45, H13

Exploring the limits of absolute position accuracy in single emitter localization microscopy — •Maximilian Heller, Chenxi Ma, Timon Handrup, Yiteng Zhang, Xian Zheng, Micheal Zopf, and Fei Ding — Leibniz Universität Hannover, Institut für Festkörperphysik, Appelstraße 2, 30167 Hannover

Solid-state single photon emitters (SPEs) integrated in photonic nanostructures provide highly efficient light-matter interfaces for quantum information applications. Wide-field optical positioning has shown the potential to be an inexpensive method with high troughput to achieve the desired spatial matching of SPEs to the nanostructure. However, the accuracy of optical positioning setups has been overlooked so far and mainly the fitting uncertainty has been used as figure of merit. Here, we use arrays of gold nanodisks with pre-defined positions to systematically quantify the main sources of error in fabrication and imaging. From this, we develop a comprehensive calibration model to render the systematic errors insignificant compared to the uncertainties. We demonstrate that the careful calibration of the optical positioning process leads to an increased yield of quantum photonic devices by fabricating and characterizing a large number of circular Bragg gratings around epitaxial quantum dots.

Keywords: Optical microscopy; Epitaxial quantum dots; Deterministic coupling