Regensburg 2025 – scientific programme

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SYSD: Symposium SKM Dissertation Prize 2025

SYSD 1: SKM Dissertation Prize Symposium

SYSD 1.2: Invited Talk

Monday, March 17, 2025, 10:00–10:30, H2

Advanced Excitation Schemes for Semiconductor Quantum Dots — •Yusuf Karli — Cavendish Laboratory, University of Cambridge, Cambridge, UK — Institut für Experimentalphysik, Universität Innsbruck, 6020, Innsbruck, Austria

Semiconductor quantum dots are nanometer-scale structures that confine electrons in three dimensions, creating discrete energy levels similar to those in atoms. This unique property makes them an excellent platform for generating high-quality single photons with high purity and indistinguishability. As such, they are critical for advancing quantum technologies, serving as essential building blocks for quantum communication, quantum computing, and photonic quantum networks.

In this talk, I address practical challenges associated with traditional excitation methods for semiconductor quantum dots by introducing innovative approaches. These include below-bandgap excitation (the SUPER scheme), a two-pulse technique (Stimulated TPE), and Adiabatic Rapid Passage (ARP). These methods enhance robustness, improve photon indistinguishability, and enable efficient population transfer, positioning semiconductor quantum dots as reliable and scalable sources for quantum photonic systems.

Keywords: quantum cryptography; semiconductor quantum dots; SUPER Scheme; adiabatic rapid passage; single photon generation