Simulation of Dispersion and Hyperbolic Wave in Metal–Dielectric Layered Metamaterial
Application ID: 120711
The modal dispersion in a metamaterial can be engineered by changing the type of material and dimension of the composing unit cells. For instance, a periodically organized subwavelength metal–dielectric layered metamaterial exhibits an anisotropic dispersion characteristic in the momentum space. Within a specific frequency range, this type of structure possesses electric permittivities of opposite signs in the orthogonal optical axes. This means that it behaves as a metal (i.e., inductive L) along one axis and dielectric (i.e., capacitive C) in the orthogonal direction. The resulting (L-C) resonance generates a hyperbolic-like dispersion in the momentum space.
In this example model, a visible frequency plasmonic hyperbolic metamaterial is constructed using periodically organized Ag (10 nm thickness) and SiO2 (15 nm thickness). The hyperbolic mode is excited using a point dipole source, located at a distance 25 nm above the metamaterial.
Learn more in this related blog post: Modeling a Hyperbolic Wave in a Metal–Dielectric Layered Metamaterial
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 Grille des Spécifications 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.