# Solution to Exercise 6.1-1

| It's not so difficult. Just do it yourself.
|  | Well, you may have a look at the very first international publication about this topic: M. G. A. Bernard, G. Duraffourg, Laser Conditions in Semiconductors (Physica Status Solidi, 1961).
|  | How it came that such a fundamental result was published in a newly founded journal based in East Berlin and not in one of the highly ranked US American journals (which are the "usual suspects" in such a case) was revealed 51 years later by M. Bernard: The history of laser conditions in semiconductors (Semiconductor Science and Technology, 2012).

With frame

Exercise 6.1-1

© H. Föll (Semiconductors - Script)