Microwave generation in synchronized semiconductor superlattices
journal contributionposted on 18.05.2017, 11:02 by Marat Gaifullin, Natalia V. Alexeeva, Alexander E. Hramov, V.V. Makarov, V.A. Maksimenko, Alexey A. Koronovskii, Mark Greenaway, T.M. Fromhold, A. Patane, Christopher Mellor, Feodor Kusmartsev, Alexander Balanov
We study high-frequency generation in a system of electromagnetically coupled semiconductor superlattices fabricated on the same doped substrate. Applying a bias voltage to a single superlattice generates high-frequency current oscillations. We demonstrate that within a certain range of the applied voltage, the current oscillations within the superlattices can be self-synchronized, which leads to a dramatic rise in the generated microwave power. These results, which are in good agreement with our numerical model, open a promising practical route towards the design of high-power miniature microwave generators.
This work is supported by the Engineering and Physical Sciences Research Council (Grants No. EP/K503800/1 and No. EP/M016099/1). The numerical studies of the synchronization of the semiconductor superlattices is supported by the Russian Foundation for Basic Research (Grants No. 15-02-00624-a and No. 16-32-00272-mol-a). A. E. H. also acknowledges support from the Ministry of Education and Science of Russian Federation (Project No. 3.4593.2017/VU).