Dynamical tuning between nearly perfect reflection, absorption, and transmission of light via graphene/dielectric structures

Abstract

Exerting well-defined control over the reflection $(R)$, absorption $(A)$, and transmission $(T)$ of electromagnetic waves is a key objective in quantum optics. To this end, one often utilizes hybrid structures comprised of elements with different optical properties in order to achieve features such as high $R$ or high $A$ for incident light. A desirable goal would be the possibility to tune between all three regimes of nearly perfect reflection, absorption, and transmission within the same device, thus swapping between the cases $R\to 1$, $A\to 1$, and $T\to 1$ dynamically. We here show that a dielectric interfaced with a graphene layer on each side allows for precisely this: by tuning only the Fermi level of graphene, all three regimes can be reached in the THz regime and below. Moreover, we show that the inclusion of cylindrical defects in the system offers a different type of control of the scattering of electromagnetic waves by means of the graphene layers.

10 pages, 4 figures

References in corpus (7)

• Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
• STM Spectroscopy of ultra-flat graphene on hexagonal boron nitride
• Epsilon-Near-Zero (ENZ) Metamaterials and Electromagnetic Sources: Tailoring the Radiation Phase Pattern
• Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene
• Giant Faraday rotation in single- and multilayer graphene
• Design of Tunable Biperiodic Graphene Metasurfaces
• Novel hyperbolic metamaterials based on multilayer graphene structures