A journey from solid-state physics to quantum technologies
Optics of semiconductor nanostructures
The optics of semiconductor nanostructures group is concerned with a wide spectrum of research topics going from fundemantel aspects of light-matter interactions to optoelectronic devices, and from electronics structure engineering to material characterization.
From 2025 onwards, our team leaves X (formerly Twitter) and posts its updates on Bluesky.
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Jacqui Romero, associate professor at the University of Queensland and qudit expert, visited on Feb 6, 2025, to see how we use quantum-dot-based nonlinearity for photon state generation.In her seminar, she explored qudit research, focusing on Laguerre-Gaussian modes. Her team has scaled encoding modes to 17-dit and implemented high-dimensional programmable gates.
Now, these advances are transitioning to optimized chip architectures via inverse design. More exciting results to come!
In this publication, we address the influence of photon-number coherence on quantum interference experiments, highlighting its effects on Hong–Ou–Mandel measurements, indistinguishability estimations, and additional entanglement during partial measurements and examines its implications for quantum protocols, including modifications to heralding efficiency and the fidelity of two-qubit gates.
By entangling a single spin with successively emitted photons, we demonstrate full spin control using fast optical pulses. This enables on-demand reconfiguration of quantum states, paving the way for generating “caterpillar” graph states—the most versatile type achievable with a single emitter.
SEM images of deterministic micropillars on a single-photon-source device, Edelight 2024.
