Specialists from MIPT and the Federal Research Center of the Russian Academy of Sciences have developed a unique hybrid phosphor based on quantum dots made of indium phosphide.
This material, enhanced with manganese ions and a zinc sulfide shell, is capable of emitting light in three different ways simultaneously: fluorescence, phosphorescence, and delayed fluorescence. By controlling the structure of nanocrystals, scientists can tune the emission properties, which opens up opportunities for creating breakthrough solutions in the defense sector.
The new phosphor can become the basis for compact and efficient night vision devices, laser designators, or covert communication systems. For example, materials with controlled emission will allow the development of camouflage coatings that are "invisible" to thermal imagers and enemy sensors. In addition, such phosphors will be useful in laser guidance systems, where it is important to precisely control the wavelength and intensity of light.
A special feature of the development is the ability to emit light with different decay times. This makes it possible to create devices that automatically adapt to environmental conditions. For example, sensors based on such phosphors will be able to operate both in the dark and in bright light, increasing the reliability of military equipment. The addition of manganese also creates a "delayed" energy transfer, which can be used in laser suppression protection systems or for encoding signals in secure communications.
The development of Russian scientists reduces dependence on foreign technologies in a critically important area for defense — nanophotonics. Controlled phosphors will allow the creation of more compact, energy-efficient, and low-profile systems for the army.
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