Microwave generator based on tunnel-coupled semiconductor-metamaterial structure

We propose a model of a tunable laser based on a tunnel-coupled waveguide semiconductormetamaterial structure. The waveguide semiconductor channel has a positive refractive index and a high Kerr nonlinearity coefficient. In the frequency range under investigation, the channel formed by the magnetoactive metamaterial is characterized by a negative refractive index. Computer simulation is used for investigating the peculiarities of generation of microwave radiation under pumping due to modulated instability in the semiconductor channel and a distributed feedback. The generation frequency is controlled using the dependence of the refractive index of the metamaterial on the external magnetic field.