Title: A FEL Based on a Superlattice,
Abstract: The motion and photon emission of electrons in a superlattice may be
described as in an undulator. Therefore, there is a close analogy between
ballistic electrons in a superlattice and electrons in a free electron laser
(FEL). Touching upon this analogy the intensity of photon emission in the IR
region and the gain are calculated. It is shown that the amplification can be
significant, reaching tens of percent.