Coherent perfect absorber and laser modes in purely imaginary metamaterials

Journal Article (Journal Article)

Conjugate metamaterials, in which the permittivity and the permeability are complex conjugates of each other, possess the elements of loss and gain simultaneously. By employing a conjugate metamaterial with a purely imaginary form, we propose a mechanism for realizing both coherent perfect absorber (CPA) and laser modes. Moreover, the general conditions for obtaining CPA and laser modes, including obtaining them simultaneously, are revealed by analyzing the wave scattering properties of a slab made of purely imaginary metamaterials (PIMs). Specifically, in a PIM slab with a subunity effective refractive index, the CPA mode can be simplified as a perfect absorption mode and the incident wave from one side could be perfectly absorbed.

Full Text

Duke Authors

Cited Authors

  • Fu, Y; Cao, Y; Cummer, SA; Xu, Y; Chen, H

Published Date

  • October 16, 2017

Published In

Volume / Issue

  • 96 / 4

Electronic International Standard Serial Number (EISSN)

  • 2469-9934

International Standard Serial Number (ISSN)

  • 2469-9926

Digital Object Identifier (DOI)

  • 10.1103/PhysRevA.96.043838

Citation Source

  • Scopus