najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2017-8-6-717-722najo-597Research ArticlePHYSICSФИЗИКАAmplification of electromagnetic radiation in a superlattice placed in a tilted magnetic fieldAmplification of electromagnetic radiation in a superlattice placed in a tilted magnetic fieldPyataevM. A.PyataevM. A.

Bolshevistskaya, 68, Saransk, 430005

Bolshevistskaya, 68, Saransk, 430005

pyataevma@gmail.comShorokhovA. V.ShorokhovA. V.

Bolshevistskaya, 68, Saransk, 430005

Bolshevistskaya, 68, Saransk, 430005

KhvastunovN. N.KhvastunovN. N.

Studencheskaya, 11 A, Saransk, 430007

Studencheskaya, 11 A, Saransk, 430007

VlasovK. R.VlasovK. R.

Bolshevistskaya, 68, Saransk, 430005

Bolshevistskaya, 68, Saransk, 430005

KrevchikV. D.KrevchikV. D.

Krasnaya, 40, Penza, 440026

Krasnaya, 40, Penza, 440026

SemenovM. B.SemenovM. B.

Krasnaya, 40, Penza, 440026

Krasnaya, 40, Penza, 440026

AlekseevK. N.AlekseevK. N.

Loughborough, Leicestershire LE11 3TU

Loughborough, Leicestershire LE11 3TU

KusmartsevF. V.KusmartsevF. V.

Loughborough, Leicestershire LE11 3TU

Loughborough, Leicestershire LE11 3TU

National Research Mordovia State UniversityNational Research Mordovia State UniversityMordovian State Pedagogical InstituteMordovian State Pedagogical InstitutePenza State UniversityPenza State UniversityLoughborough UniversityLoughborough University20171208202586717722Copyright © Pyataev M.A., Shorokhov A.V., Khvastunov N.N., Vlasov K.R., Krevchik V.D., Semenov M.B., Alekseev K.N., Kusmartsev F.V., 20252025Pyataev M.A., Shorokhov A.V., Khvastunov N.N., Vlasov K.R., Krevchik V.D., Semenov M.B., Alekseev K.N., Kusmartsev F.V.Pyataev M.A., Shorokhov A.V., Khvastunov N.N., Vlasov K.R., Krevchik V.D., Semenov M.B., Alekseev K.N., Kusmartsev F.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/597

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.

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.

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The authors declare that there are no conflicts of interest present.