Controlling coherent perfect absorption via long-range connectivity of defects in three-dimensional zero-index media.

ABSTRACT: Coherent perfect absorption (CPA), as time-reversed lasing, arises from appropriate wave interference within absorbers, offering flexible control over wave absorption. Typically, this control involves tuning the phase difference between two counter-propagating incident beams. Here, we elucidate the critical role of defect connectivity within three-dimensional zero-index media for realizing and controlling CPA. Specifically, the realization of CPA critically depends on the establishment of long-range connectivity of defects in a specific direction. Once the long-range connectivity is established, the CPA exhibits remarkable resilience against defects' deformation, changes in size and shape of the zero-index media, as well as variations in number and orientation of incident channels. Notably

SUBMITTER: Yan D 

PROVIDER: S-EPMC11501844 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature