Requirements of integrated photonics and miniaturisation of optical devices demand
efficient nonlinear components not constrained by conventional macroscopic nonlinear …

This tutorial aims to provide an extensive overview of methods of generating and shaping
light at new frequencies by using nonlinear metasurfaces. We first review methods of …

Taking advantage of their unique and tuneable electromagnetic properties, plasmonic
metamaterials constitute a versatile platform for a variety of applications ranging from high …

We develop a nested hybridizable discontinuous Galerkin (HDG) method to numerically
solve the Maxwell's equations coupled with a hydrodynamic model for the conduction-band …

Generation of laser light harmonics is one of the nonlinear optical phenomena offering
unique opportunities for the development of applications in fields like photonics, materials …

Abstract We apply the Discontinuous Galerkin Time Domain (DGTD) method for numerical
simulations of the second harmonic generation from various metallic nanostructures. A …

Local electromagnetic field enhancement in resonant metamaterials is useful for efficient
generation of nonlinear phenomena; however, the field enhancement is suppressed by …

Metallic nanostructures are known for enhancing weak nonlinear processes when a
resonant and coherent excitation takes place. With proper structural design, an additional …

To realize efficient nonlinear metamaterials, we investigate a method for enhancing the local
electric field in a metamolecule composed of two radiatively coupled cut-wire resonators …

This thesis presents results on the fabrication, investigation and characterization of active
optical nanoantennas. The three partial results in order of their occurrence are:(i) The …