The Nobel Prize in Physics 2025 was awarded to John Clarke, Michel H. Devoret and John M. Martinis "for the discovery of macroscopic quantum mechanical ...

We report on the pulsed laser deposition of ultrathin MoS2 films and how their electrical conductivity is significantly sensitive to thickness variation. It is

Bi2Se3, a layered three-dimensional topological insulator, exhibits intriguing changes in its band structure when its thickness is reduced below 7 quintuple layers. The reduction in thickness leads to...

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Quantum confinement and reduced dielectric screening lead to strong excitonic effects in atomically thin transition metal dichalcogenides (TMDs). Encapsulation of TMD monolayers in hexagonal boron nitride (hBN) unveils the excitonic Rydberg series below the free particle bandgap. The nonequilibrium response and the dynamics of these higher order exciton states and their multiparticle complexes remain almost unexplored. Here we use ultrafast pump–probe optical microscopy to measure the dynamics of excited-state (2s) excitons in hBN-encapsulated monolayer WSe2. 2s excitons form through an ultrafast relaxation process from high-energy states and exhibit longer decay dynamics than ground state excitons due to their higher spatial extension. We detect light-induced formation of 2s trions with significant oscillator strength and faster decay dynamics than 2s excitons, attributed to an intra-excitonic Auger effect causing an additional decay channel. Our results shed light on the dynamics of excited state excitons in TMDs and their interactions with free carriers.

Trois projets de recherche en partenariat avec le Royaume-Uni généreront des avancées dans ce secteur dont le potentiel révolutionnaire est reconnu par l’UNESCO.

Un partenariat académique Québec-Bavière pour repousser les frontières du savoir 🌎 Les professeurs Andreas Ruediger et Emanuele Orgiu du Centre Énergie Matériaux Télécommunications de l'INRS, ai...

This study presents the charge injection and transport properties of field-effect transistors based on an isoindigo-bithiophene donor-acceptor polymer semiconductor contacted with thiolated self-asse....