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Generation of Slow Surface Plasmon Polaritons in a Complex Waveguide Structure with Electric Current Pump
Author(s) -
Moiseev Sergey G.,
Dadoenkova Yuliya S.,
Kadochkin Aleksei S.,
Fotiadi Andrei A.,
Svetukhin Vyacheslav V.,
Zolotovskii Igor O.
Publication year - 2018
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.201800197
Subject(s) - surface plasmon polariton , surface plasmon , terahertz radiation , materials science , waveguide , grating , optoelectronics , optics , plasmon , graphene , current (fluid) , planar , physics , nanotechnology , computer graphics (images) , computer science , thermodynamics
A planar spaser structure composed of semiconducting film and graphene with DC current is proposed and theoretically explored. Graphene possesses velocity of drift current carriers comparable with the phase velocity of surface plasmon polaritons (SPPs) in ultrathin semiconducting film at the terahertz regime. When the synchronism condition between current and slow surface electromagnetic waves is realized, the amplification of plasmons by electric current takes place. In the proposed complex waveguide structure, positive feedback is realized due to reflections from the edges of the active waveguide, and the SPPs are decoupled into light by a microscopic grating manufactured on the semiconducting film surface.