Dispersion and Hyperbolic Wave in a 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
案例中展示的此类问题通常可通过以下产品建模:
您可能需要以下相关模块才能创建并运行这个模型，包括：
建模所需的 COMSOL® 产品组合取决于多种因素，包括边界条件、材料属性、物理场接口及零件库，等等。不同模块可能具有相同的特定功能，详情可以查阅技术规格表，推荐您通过免费的试用许可证来确定满足您的建模需求的正确产品组合。如有任何疑问，欢迎咨询 COMSOL 销售和技术支持团队，我们会为您提供满意的答复。