World's thinnest lens created

SalamNews

A team of scientists from the University of Amsterdam in the Netherlands and Stanford University in the US have created the world's thinnest lens, which is just 0.6 nanometers, or three atoms, thick.

The ultra-thin lens consists of concentric rings with spaces between them. It focuses light using diffraction rather than refraction. The size and distance between the rings determine the focal length of the subject.

Experts have achieved exceptional characteristics of their product through the use of tungsten disulfide, which has quantum properties. These effects allow the material to absorb and re-emit light of specific wavelengths.

Tungsten disulfide absorbs photons, sending the electron to a higher energy level. Due to the ultrafine structure of the material, a negatively charged electron and its positively charged nest in the atomic lattice remain bound to each other by electrostatic voltage, forming a so-called exciton. The excitons quickly disappear as the electron returns to the socket and emits light.

Another unique feature of the lens is that although some of the light passing through it forms a bright focal point, most of the light passes through it unchanged. This will allow the use of nanolenses in augmented reality technologies and other areas, the researchers said.

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