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

Report Date:

2017-09-05

Pagination or Media Count:

12.0

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