Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 17: Quantum Dots and Wires 4: Devices

HL 17.8: Vortrag

Mittwoch, 7. September 2022, 11:45–12:00, H32

Quantum Dot Localization Methodology based on Imaging — •Marc Sartison, Eva Schöll, Lukas Hanschke, Ioannis Caltzidis, Oscar Camacho Ibarra, and Klaus D. Jöns — PhoQS, CeOPP, and Department of Physics, Paderborn University, Germany

Since the discovery of the triggered generation of single photons in 2000, quantum dots have proven to be one of the most versatile quantum light sources for pure, indistinguishable, entangled photons while maintaining high brightness. Before developing deterministic integration techniques, high yield in device fabrication remained elusive due to the statistical growth properties in high-quality self-assembled growth modes. Several methods have been developed, providing the quantum dot location and its spectral information, namely in-situ optical lithography, in-situ electron beam lithography, and quantum dot localization using quantum dot imaging. Our work describes a methodological workflow using computational, and image processing approaches in python to precisely determine the quantum dot position concerning pre-deposited metal marker structures. Here, we investigate different hardware, marker geometries, and software methods. Furthermore, we quantify the expectable upper bound accuracy for device integration. Importantly, our presented methods are not developed for a fixed emitter wavelength or type. With the right choice of optical elements within the setup, it is possible to cover the wavelengths from the visible up to the telecom C-band. The presented technique can, in principle, be applied to any type of solid-state quantum emitters.