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.
Follow us on @c2n-qdqt.bsky.social
Pascale will hold the prestigious Chaire of Professor at the College de France this year, the Innovation Chaire.
This position is a recognition of her work done at LPN & C2N for many years, and in the last 8 years, together with Quandela teams. Her mission at the College de France will begin with an inaugural lecture at 18:00 on December 11th at the College de France. As this is a public event, everyone is welcome to attend – our team will be there!
Depends!
At this point, being often limited by fiber brightness, BB84 secret key rate (SKR) can be higher at very short distances with laser pulses than with single photons.
In the new pre-print, Portella et al, we compare single photons one-to-one with laser pulses and propose a strategy to increase SKR at short distances by controlled mixing extra laser light to compensate for the reduced brightness.
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.
