2 papers
cond-mat.mes-hall2026
Moiré-Enhanced Plasmonics in Non-Hermitian Twisted Bilayer Graphene
Andrianos Sygrimis, Giorgos P. Tsironis
We study plasmonic excitations in twisted bilayer graphene within a non-Hermitian framework that incorporates effective gain and loss. Using a non-Hermitian extension of the Bistri…
physics.optics2026
Lossless propagation of gain-compensated graphene plasmons
Andrianos Sygrimis, Giorgos P. Tsironis
Graphene supports surface plasmon polaritons with extreme field confinement and electrical tunability, but these waves are typically short-lived due to ohmic loss in the sheet. We…