A team of researchers at Eindhoven developed a new type of low-energy, nanoscale laser that shines in all directions.
The researchers introduced irregularities in nanotechnology, allowing the feature of omnidirectional light emission. The findings were published in the journal Physical Review Letters on December 14, 2018. They hope that their findings will help scientists to innovate its usage in a wide range of potential applications.
Nanolasers can profitably use disorders to nanosystems for novel physical concepts and applications. Researchers from Eindhoven University of Technology (TU/e) and the Dutch Institute for Fundamental Energy Research (DIFFER) investigated the role of imperfections and disorder in nanolasers. They found that when a slight degree of disorder is made in nanolasers, the laser starts emitting light in all directions rather than in only one direction.
For nanoscale lasers, the process of Light Amplification by Stimulated Emission of Radiation (LASER) is done, where the each photon (light particle) is ‘cloned’ many times in a medium that is located inside a cavity. The researchers demonstrated nanoscale polariton lasers that function at ambient temperature, with the help of metallic nanoparticles instead of mirrors as in normal lasers.
Jaime Gomez Rivas, lead researcher of the study, said: “An omnidirectional laser does not require the moving mirrors, thereby significantly reducing the complexity. But the research is still very fundamental. We hope that our results will stimulate other researchers to improve them by further reducing the lasing threshold or increasing the range of emitted colors.”