Coherent perfect absorption and laser modes in a cylindrical structure of conjugate metamaterials

Journal Article (Journal Article)

In this work, we theoretically find that coherent perfect absorption (CPA) and laser modes can be realized in a two-dimensional cylindrical structure composed of conjugate metamaterials (CMs). The required phase factors of CMs for achieving CPA and laser modes are determined by the geometric size of the CM cylinder, which is a unique feature compared with other non-Hermitian optical systems. Based on this property, we also demonstrate that CPA and laser modes can exist simultaneously in a CM cylinder with an extremely large size, where the excitations of CPA and laser modes depend on the angular momentum of coherent incident light. Therefore, compared with the well known parity time symmetry, our work opens up a brand-new path to obtaining CPA and laser modes, and is a significant advance in non-Hermitian optical systems.

Full Text

Duke Authors

Cited Authors

  • Fu, Y; Xu, Y; Chen, H; Cummer, SA

Published Date

  • January 1, 2018

Published In

Volume / Issue

  • 20 / 1

International Standard Serial Number (ISSN)

  • 1367-2630

Digital Object Identifier (DOI)

  • 10.1088/1367-2630/aa9cbd

Citation Source

  • Scopus