Abstract
The absorption efficiency of a coherent perfect absorber usually depends on the phase coherence of the incident waves on the surfaces. Here, we present a scheme to create a multi-channel coherent perfect absorber in which the constraint of phase coherence is loosened. The scheme has a multi-layer structure such that incident waves in different channels with different angular momenta can be simultaneously and perfectly absorbed. This absorber is robust in achieving high absorption efficiency even if the incident waves become "incoherent" and possess "random" wave fronts. Our work demonstrates a unique approach to designing highly efficient metamaterial absorbers. © CopyrightEPLA, 2016.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 28003 |
| Journal | EPL (Europhysics Letters) |
| Volume | 114 |
| Issue number | 2 |
| DOIs | |
| State | Published - May 18 2016 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: The work described here is supported by King Abdullah University of Science and Technology, the State Key Program for Basic Research of China (No. 2014CB360505, No. 2012CB921501), National Natural Science Foundation of China (No. 11374224), and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).