HSE University St. Petersburg has presented an innovative technology that allows the creation of microlasers with a diameter of only 5–8 micrometers. The devices operate at room temperature and do not require additional cooling: ideal for integration into microcircuits.
The researchers were inspired by the whispering gallery effect, which is observed in ancient temples. The acoustic phenomenon allows sound to be transmitted from one wall to another, even if it is not audible under normal conditions. A similar principle was used to create lasers, where light is repeatedly reflected inside a disk resonator, which minimizes losses.
Eduard Moiseev, a senior researcher at HSE University, said that thanks to this effect, it was possible to keep light inside the resonator. A unique layer, consisting of changing elements, played an important role in the development. The discovery will allow the creation of lasers that can be used in miniature devices comparable in size to red blood cells. The development of such compact lasers is of great importance for the optoelectronic industry.
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