Loss compensation symmetry in dimers made of gain and lossy nanoparticles

Abstract

The eigenoscillations in a two-dimensional dimer made of gain and lossy nanoparticles were investigated within exact analytical approach. It was shown that there are eigenoscillations 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 (LCS) as well as well-known PT (parity-time) symmetric solutions. The modes with LCS unlike PT symmetric ones allow one to achieve full loss compensation with significantly less gain that in the case of PT symmetry. This effect paves way to the new loss compensation methods in optics.

10 pages, 6 figures

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Cited by in corpus (4)

• Multimode parity-time and loss-compensation symmetries in coupled waveguides with loss and gain
• Refraction enhancement in plasmonics by the coherent control of plasmon resonances
• Loss compensation symmetry of unequally sized dielectric cylinders with gain and loss
• Lasing condition for trapped modes in subwavelength--wired PT--symmetric resonators