Pulse generation by on-chip dispersion compensation at 8 μm wavelength

The mid-infrared spectral region holds growing importance for applications such as gas sensing and spectroscopy, and compact ultrashort pulse laser sources are essential to enable these applications. However, the fast gain dynamics of intersubband transitions hinders the direct generation of pulses from quantum cascade lasers (QCL). In this work, based on a collaboration between C2N (CNRS/Universite Paris Saclay), ETH Zurich and Politecnico di Milano, we take advantage of …

The CNRS has just announced the awarding of its 2026 Gold Medal to Jacqueline Bloch, CNRS research director at C2N.

Jacqueline Bloch is an internationally recognized specialist in light-matter interaction. With her team, she explores the physics of polaritons, quantum fluids of light manipulated in semiconductor microcavities, to probe phenomena as varied as superfluidity, topology, and non-equilibrium phase transitions. Having joined the CNRS in 1994, she received the Jean Ricard Prize from the French Physical Society (2015), the CNRS Silver Medal (2017), and the Ampère Prize from the Académie des …