Des physiciens créent un modèle unifié pour les impulsions laser pulsantes

21 mai 2026

Rapporté par l'IA

Une équipe de recherche internationale a développé un cadre mathématique unique qui explique le comportement rythmique inhabituel des impulsions laser pulsantes. Cette avancée réunit pour la première fois deux régimes de dynamique laser jusqu'ici distincts.

Des chercheurs, dont le Dr Sonia Boscolo de l'Université d'Aston, ont publié leurs conclusions dans Physical Review Letters. L'étude démontre que les cycles de pulsation rapides et lents des lasers ultrarapides proviennent de processus physiques apparentés plutôt que de mécanismes distincts. Les pulsateurs au-dessus du seuil oscillent rapidement et se verrouillent à la cavité, tandis que les pulsateurs en dessous du seuil évoluent lentement grâce au déclenchement (Q-switching) combiné à la formation de solitons.

Articles connexes

EPFL scientists shrink ultrafast laser onto photonic chip

Researchers at EPFL have created the first chip-scale ultrafast laser that matches the performance of traditional tabletop femtosecond lasers. The device delivers pulses as short as 147 femtoseconds with energies of 1.05 nanojoules.

MIT scientists harness chaotic laser for faster brain imaging

28 avril 2026 Rapporté par l'IA

Researchers at MIT have discovered that chaotic laser light can self-organize into a highly focused pencil beam, enabling 3D imaging of the blood-brain barrier 25 times faster than current methods. The technique allows real-time observation of drugs entering brain cells without fluorescent tags. This breakthrough could speed up development of treatments for neurological diseases like Alzheimer's and ALS.

Science

Scientists observe atoms spinning backward in quantum experiment

Science

Photons multiply infinitely when partially reflected by fast mirror

Science

Study explores quantum clocks ticking at multiple speeds

Device measures pressure from single particles for first time

A new device using a laser-held bead has enabled the first direct measurement of pressure exerted by individual particles. Developed by researchers at Yale University, the tool could advance studies in extreme vacuums and help search for elusive particles like sterile neutrinos.

University of Chicago team simplifies creation of entangled quantum states

6 juin 2026 Rapporté par l'IA

Researchers at the University of Chicago have developed a straightforward method to produce complex entangled quantum states using basic adjustments in optical cavity systems. The approach relies on existing laboratory tools and could advance quantum sensing applications. Their findings appear in a recent issue of Physical Review X.

Business