Graphene Metamaterial Perfect Absorber
Application ID: 107251
Graphene, carbon atoms arranged in a two-dimensional hexagonal lattice has sparked tremendous research and application interests since its experimental discovery about two decades ago. Besides being ultrathin, this material exhibits a plethora of interesting properties, including high electrical and thermal conductivities, high elasticity, high mechanical strength, and so on. Among various applications, a promising field is graphene-based electro-optical devices, such as photodetectors, photodiodes, and metamaterials. An additional desirable trait of graphene is that its optical response can be actively controlled by changing its Fermi energy via electrical gating. In this model, we first demonstrate how to compute the optical conductivity of graphene using the Kubo formula. The computed conductivity is then used to model a graphene-based THz metamaterial absorber.
A more detailed description of this model can be found in our blog post "Modeling Graphene in High-Frequency Electromagnetics".
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.