The method of amplifying the power of RF modulated terahertz radiation of a 30-period weakly coupled semiconductor GaAs / AlGaAs superlattice

摘要

1. The method of amplifying the power of radio frequency-modulated radiation of a 30-period weakly coupled GaAs / AlGaAs superlattice (CP), different from the method of amplifying the radiation power implemented in quantum cascade lasers (QCL), in that several tens of active modules are connected in series in a QCL, whereas in this weakly coupled CP, several mesa structures (active modules) displaced to the generation mode of self-oscillations of the current are connected in parallel, as well as by the fact that instead of a strongly coupled superlattice with narrow barriers (≤ 4 nm) as The active modules use a weakly coupled superlattice in which the width of the barriers is 10 nm. 2. A method for amplifying the power of radio frequency-modulated radiation of a 30-period weakly coupled GaAs / AlGaAs superlattice (CP), characterized in that THz radiation is generated in the indicated superlattice, modulated with the self-oscillation frequency of the current, and it is shown that with an increase in the number of mesa structures of the superlattice shifted in the mode of self-oscillations of the current, the radiation power increases linearly, and the depth of the amplitude modulation of the radiation of the superlattice is 100%.