Accession Number : AD1040681


Title :   Metamaterial Perfect Absorber Analyzed by a Meta-Cavity Model Consisting of Multilayer Metasurfaces (Postprint)


Descriptive Note : Journal Article - Open Access


Corporate Author : University of South Florida Tampa United States


Personal Author(s) : Bhattarai,Khagendra ; Silva,Sinhara ; Song,Kun


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1040681.pdf


Report Date : 05 Sep 2017


Pagination or Media Count : 12


Abstract : We demonstrate that the metamaterial perfect absorber behaves as a meta-cavity bounded between a resonant metasurface and a metallic thin-film reflector. The perfect absorption is achieved by the Fabry-Perot cavity resonance via multiple reflections between the quasi-open boundary of resonator and the close boundary of reflector. The characteristic features including angle independence, ultra-thin thickness and strong field localization can be well explained by this meta-cavity model. With this model, metamaterial perfect absorber can be redefined as a meta-cavity exhibiting high Q-factor, strong field enhancement and extremely high photonic density of states, thereby promising novel applications for high performance sensor, infrared photodetector and cavity quantum electrodynamics devices.


Descriptors :   metamaterials , thin films , resonance reflectors , photodetectors , metamaterial absorbers


Subject Categories : Miscellaneous Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE