Pittsburgh scientists discovered an exciton in metal

 

 

A team of researchers at the University of Pittsburgh was the first who discovered the fundamental particle interactions of light and matter in metals.

Humanity uses the reflection of light from a metal mirror on a daily basis for millennia, but the quantum mechanical basis of this familiar phenomenon is only found now.

Physics of the described physical phenomena from the point of view of interaction between fields and particles, said Professor Pitek. To

when light strikes the metal mirror and is reflected, it "shakes" the free electrons of the metal and, as a consequence, there is their acceleration, which creates an almost perfect copy of incident light or a reflection.

The classical theory of electromagnetism provides a good understanding of the inputs and outputs of the process, but a quantum-mechanical description of how light excites the electrons is lacking.

Pittsburgh and chemists from the Institute in Zagreb presented the report on how matter and light interact on the surface of the silver crystal and observed the exciton in metal.

Scientists have discovered that poverhnostyu electrons of silver crystals can maintain the excitonic effect 100 times greater than solid metals.

The ability to detect the excitons in metals sheds light on how it is converted into electrical and chemical energy in plants and solar cells, and in the future it will allow to use metals as the active elements in optical communication.

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Source: nauka24news.ru/