Using sub-wavelength structures deposited on a substrate, we can obtain photonic elements. Their applications range from metalenses to special optics. These elements can be designed for both ultraviolet and terahertz waves. The widespread use of these elements is due to the fact that by changing the orientation, shape, material, or other properties of the individual sub-wavy particles, we can control the overall response of such a system, the so-called meta-atom. From such single meta-atomes, it is possible to create two-dimensional functional metasurfaces. One of the techniques for forming two-dimensional meta-surfaces or three-dimensional metamaterial layers is to form surface clusters of sub-wavelength particles.
Numerical modeling of such metamaterials and their application to photonic elements is the main objective of this topic. Theoretically predicted and numerically verified cluster nanoparticle or structural nanoparticle meta surfaces would allow the creation of a new type of photonic element that transforms radiation into an electromagnetic field of desired intensity distribution and / or polarization. This work would be a theoretical one, however it could be turned into
For more information, please contact the theme supervisor S. Orlovas.