LED bulbs are highly energy-efficient and have a long runtime. Meanwhile, progress does not stand still. British scientists have created an artificial fog, which in the future can replace the usual means of lighting due to high energy efficiency and unique properties.
A key feature of artificial fog is its ability to scatter laser light, providing high brightness at low power. Researchers at Imperial College London argue that light bulbs based on the new laser system will be much more energy-efficient than LED bulbs.
The principle of operation of the technology is not new. There are already so-called laser diodes, the light in which is created by a directed beam on phosphor materials. The main problem is the low efficiency of the process, as well as the difficulty of obtaining white light. In addition, this way it was possible to get only one color.
Researchers were able to develop an aero-BN diffuser consisting of semi-transparent randomly arranged and interconnected hollow microtubules made of hexagonal boron nitride. Using the new technology, it was possible to obtain white light by directing red, blue and green lasers into a diffuser, which is located in an ultra-thin material bound to graphene.
The new material is 99.99% air. During exposure to lasers of different colors, white light is scattered by the nanoscopic walls of microtubules. Scientists said that the diffuser is similar to artificial fog. During the experiments, the specialists also managed to achieve the entire color palette by changing the intensity ratio of three different lasers.