25 Jun
Quasi-conductors are believed to be a unique kind of chemical elements. Such type was researched in early 1980's but there were no needed technologies to carry on the further researches. The research of semiconductors was carried on only in the 1920's. The first successful research was performed by the Russian scientists in 1923. They proved that semiconductors may be used to generate fluctuations. There was no possibility to create some sophisticated devices as igct. Just in the beginning of the 50's with the invention of transistors in 1949 the wide usage of crystal detectors started. That was the start of the era of semiconductor technologies.
Stimulated emission is actually a very interesting feature of semiconductors that has been researched for several tens of years. By usage of such principles as p - n barriers and heterojunction scientists managed to design laser system in the beginning of the 60's.