Optical cages made of graphitic frameworks

Document Type

Article

Publication Date

7-1-2021

Abstract

In pursuit of perfect infrared (IR) radiation absorbers, we examined quasi-crystal structures made of graphite wires. Simulations on an array of subwavelength graphitic cages and cage-within-cage frameworks indicate a flat absorption coefficient between 10–30 µm. The concept could be scaled up through the 50–120 µm [far-IR, terahertz (THz)] region by a proper structural design. For cage-within-cage, the IR radiation energy is funneled toward the inner cage, resulting in a rather hot structure. At longer wavelengths (microwave region), the electrical conductivity dominates the negative dielectric effect, and experiments with copper cages indicate scattering resonances. Graphitic structures allude to some absorption even at microwave frequencies. Applications are envisioned as anti-fogging surfaces, adaptable electromagnetic shields, energy harvesting, and efficient absorbers in the far-IR (THz frequencies).

Identifier

85108721787 (Scopus)

Publication Title

Applied Optics

External Full Text Location

https://doi.org/10.1364/AO.422644

e-ISSN

21553165

ISSN

1559128X

PubMed ID

34263846

First Page

5564

Last Page

5568

Issue

19

Volume

60

This document is currently not available here.

Share

COinS