Microwave Mixing by Hot Electrons in Homogeneous Semiconductors

Abstract
A new type of microwave emission from homogeneous semiconductors with nonlinear characteristics is observed when two waves of frequencies ω and ω+Δω are incidental: The emitted waves have frequencies ω−N·Δω and ω+(N+1)·Δω, N=1, 2, 3, ⋯. For medium field amplitudes, the frequency dependence of the emission is calculated taking energy relaxation of the carriers into account.