Amplification of electromagnetic radiation in a superlattice placed in a tilted magnetic field
https://doi.org/10.17586/2220-8054-2017-8-6-717-722
Аннотация
The interaction of electrons in a superlattice with electromagnetic radiation in presence of static electric and magnetic fields is investigated. The electric field is directed along the superlattice axis while the magnetic field is inclined at an arbitrary angle to the axis of superlattice. It is shown that the dependence of current in the superlattice on electric field in the general case can have several maxima. In some regions of electric and magnetic field values, the absorption coefficient for high frequency electromagnetic radiation can be negative that means the electromagnetic wave will be amplified. We note that negative absorption in the system is possible at some conditions at the region of positive differential conductivity in contrast to classical Bloch oscillator in which amplification takes place in case of negative differential conductivity only. This phenomenon can be used for the design of a teraherz amplifier and generator based on the superlattice.
Об авторах
M. A. Pyataev
National Research Mordovia State University
Россия
Россия
Bolshevistskaya, 68, Saransk, 430005
A. V. Shorokhov
National Research Mordovia State University
Россия
Россия
Bolshevistskaya, 68, Saransk, 430005
N. N. Khvastunov
Mordovian State Pedagogical Institute
Россия
Россия
Studencheskaya, 11 A, Saransk, 430007
K. R. Vlasov
National Research Mordovia State University
Россия
Россия
Bolshevistskaya, 68, Saransk, 430005
V. D. Krevchik
Penza State University
Россия
Россия
Krasnaya, 40, Penza, 440026
M. B. Semenov
Penza State University
Россия
Россия
Krasnaya, 40, Penza, 440026
K. N. Alekseev
Loughborough University
Великобритания
Великобритания
Loughborough, Leicestershire LE11 3TU
F. V. Kusmartsev
Loughborough University
Великобритания
Великобритания
Loughborough, Leicestershire LE11 3TU
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Рецензия
Для цитирования:
Pyataev M.A., Shorokhov A.V., Khvastunov N.N., Vlasov K.R., Krevchik V.D., Semenov M.B., Alekseev K.N., Kusmartsev F.V. Amplification of electromagnetic radiation in a superlattice placed in a tilted magnetic field. Наносистемы: физика, химия, математика. 2017;8(6):717-722. https://doi.org/10.17586/2220-8054-2017-8-6-717-722
For citation:
Pyataev M.A., Shorokhov A.V., Khvastunov N.N., Vlasov K.R., Krevchik V.D., Semenov M.B., Alekseev K.N., Kusmartsev F.V. Amplification of electromagnetic radiation in a superlattice placed in a tilted magnetic field. Nanosystems: Physics, Chemistry, Mathematics. 2017;8(6):717-722. https://doi.org/10.17586/2220-8054-2017-8-6-717-722
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