Loss compensation symmetry in dimers made of gain and lossy nanoparticles
Abstract
The eigenmodes in a twodimensional 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 wellknown paritytime (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.
 Publication:

Laser Physics Letters
 Pub Date:
 March 2018
 DOI:
 10.1088/1612202X/aa8cdc
 arXiv:
 arXiv:1701.05787
 Bibcode:
 2018LaPhL..15c5901K
 Keywords:

 Physics  Optics
 EPrint:
 10 pages, 6 figures