Loss compensation symmetry in dimers made of gain and lossy nanoparticles


          

刊名：Laser physics letters
作者：Klimov, V. V.（All Russia Res Inst Automat, Moscow 127055, Russia）
Zabkov, I. V.（All Russia Res Inst Automat, Moscow 127055, Russia）
Guzatov, D. V.（Yanka Kupala State Univ Grodno, Grodno 230023, Byelarus）
Vinogradov, A. P.（All Russia Res Inst Automat, Moscow 127055, Russia）
刊号：537C0020
ISSN：1612-2011
出版年：2018
年卷期：2018, vol.15, no.3
总页数：7
分类号：TN2
关键词：PT symmetry；loss compensation；dimer；eigenmodes；plasmonics
参考中译：
语种：eng
文摘：The eigenmodes in a two-dimensional dimer made of gain and lossy nanoparticles have been investigated within an exact analytical approach. It has been shown that there are eigenmodes for which all Joule losses are exactly compensated by the gain. Among such solutions there are solutions with a new type of symmetry, which we refer to as loss compensation symmetry, as well as well-known parity-time (PT) symmetric solutions. Unlike PT symmetric ones, the modes with loss compensation symmetry allow one to achieve full loss compensation with significantly less gain that in the case of PT symmetry. This effect paves the way to new loss compensation methods in optics.



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