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Journal of Radio Electronics Online scientific journal · eISSN 1684-1719
2024, № 5 · ELECTRODYNAMICS

Effect of the electron drift in graphene on the polarization conversion of a normally incident wave

I.M. Moiseenko1,2, V.V. Popov2

1 Moscow Institute of Physics and Technology (National Research University), Dolgoprudnyi, Russia
2 Saratov Branch of Kotelnikov IRE RAS, Saratov, Russia
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Abstract

The polarization conversion of an electromagnetic wave normally incident on graphene with a direct electric current is investigated in the hydrodynamic approach. It is shown that the dynamic conductivity of graphene depends on the direction of electron drift even in the absence of spatial dispersion (i.e., for long electromagnetic waves). This changes the polarization of electromagnetic radiation at terahertz frequencies. The real part of the dynamic conductivity of graphene with electron drift can be negative, which leads to amplification of terahertz wave.

  • graphene
  • terahertz radiation
  • polarization conversion
Аннотация (на русском)

Влияние электронного дрейфа в графене на преобразование поляризации нормально падающей волны

Исследовано преобразование поляризации электромагнитной волны, нормально падающей на графен с постоянным электрическим током. Показано, что динамическая проводимость графена зависит от направления электронного дрейфа даже в случае отсутствия пространственной дисперсии (т.е., для длинных электромагнитных волн). Это меняет поляризацию электромагнитного излучения на терагерцевых частотах. Действительная часть динамической проводимости графена с электронным дрейфом может быть отрицательной, что приводит к усилению на терагерцевой волны.

For citation

Moiseenko I.M., Popov V.V. Effect of the electron drift in graphene on the polarization conversion of a normally incident wave // Journal of Radio Electronics. – 2024. – No. 5.

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