Loss compensation in metamaterials and plasmonics with virtual gain [Invited]

• DOI: 10.1364/ome.397720
• Publication Date: 2020-07-17T18:06:46Z
• Authors: Anindya Ghoshroy; Şahin K. Özdemir; Durdu Ö. Güney
• Keywords: Testbed; Transformation Optics; Photonic metamaterial; Optical materials

Metamaterials and plasmonics potentially offer an ultimate control of light to enable a rich number non-conventional devices testbed for many novel physical phenomena. However, optical loss in metamaterials is fundamental challenge rendering conceived applications not viable practical settings. Many approaches have been proposed so far mitigate losses, including geometric tailoring, active gain media, nonlinear effects, metasurfaces, dielectrics, 2D materials. Here, we review recent efforts on the less explored unique territory “virtual gain” as alternative approach combat losses. We define virtual result any extrinsic amplification mechanism medium. Our aim accentuate only promising candidate address material challenge, but also design concept with broader impacts.