Multi-channel coherent perfect absorbers

Bai, Ping; Wu, Ying; Lai, Yun

Multi-channel coherent perfect absorbers

Type

Article

Authors

Bai, Ping
Wu, Ying

Lai, Yun

KAUST Department

Applied Mathematics and Computational Science Program
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Online Publication Date

2016-05-18

Print Publication Date

2016-04-01

Date

2016-05-18

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.

Citation

Bai P, Wu Y, Lai Y (2016) Multi-channel coherent perfect absorbers. EPL (Europhysics Letters) 114: 28003. Available: http://dx.doi.org/10.1209/0295-5075/114/28003.

Acknowledgements

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).