Nanowerk September 15, 2021 An international team of researchers (Germany, Spain, USA – the Flatiron Institute) predicted that a unique laser source could produce highly controllable electric currents in any bulk material. They focused on an intense laser beam comprised of only low-energy photons, which incorporates two circularly-polarized carrier frequencies. The polarization of the electromagnetic field of this beam plots a distinct shape in space and time. The combination of the two colors leads to a double-loop motion that pushes electrons in the solid in various directions. Together with the intense beam, the double-loop laser light produces many photons which […]
Category Archives: Lasers
Novel physics gives rise to the highest coherence for microscopic lasers
Phys.org August 27, 2021 Despite considerable progress in microscale and nanoscale lasers the coherence length remains very limited. Researchers in Denmark explored the physics and applications of a new class of photonic devices using Fano interference which operates in bound-state-in the-continuum, induced by the Fano resonance. They showed experimentally as well as theoretically that the characteristics of such a bound-state-in-the-continuum can be harnessed to improve the coherence of the laser. They developed an advanced nanotechnology platform, called Buried Heterostructure Technology which allows realizing small, nanometer-sized regions of active material, where the light generation takes place, while the remaining laser structure […]