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 is passive. Combining with this technology that eventually enables the suppression of quantum noise, leading to the highest measured coherence for microscopic lasers. The primary role of the Fano laser will be to convert the electrical data to light signals, which are transmitted within the computer almost without loss. The long-term perspective is to get much faster computer chips with minimal energy consumption…read more. TECHNICAL ARTICLE
Concept of BIC laser based on Fano resonance. Credit: Nature Photonics (2021)Â