Stephane LANTERI - UCA, Inria, CNRS LJAD, France - Keywords: nanophotonics, plasmonics

Stephane LANTERI - UCA, Inria, CNRS LJAD, France - Keywords: nanophotonics, plasmonics

Contribution title: Advanced numerical modeling and simulation of nanoscale light/matter interactions

Nanostructuring of materials has opened up a number of new possibilities for manipulating and enhancing light-matter interactions thereby improving fundamental device properties. The incorporation of metallic structures into the medium adds further possibilities for manipulating the propagation of light waves. In particular, this allows subwavelength localization of the electromagnetic field. Nanophotonics is the field of science and technology aimed at establishing and using the peculiar properties of light and light-matter interaction in various nanostructures. Because of its numerous scientific and technological applications, nanophotonics represents an active field of research increasingly relying on numerical modeling beside experimental studies. The numerical modeling of nanoscale light/matter interactions requires to solve the system of Maxwell equations possibly coupled to appropriate models of physical dispersion such as the Drude and Drude-Lorentz models. In this talk, we will report on our recent efforts aiming at the development of a family of high order finite element type solvers for the numerical treatment of nanoscale light/matter interactions. The basic ingredient is a discretization method which relies on a compact stencil high order interpolation of the electromagnetic field components within each cell of an unstructured tetrahedral mesh. This piecewise polynomial numerical approximation is allowed to be discontinuous from one mesh cell to another, and the consistency of the global approximation is obtained thanks to the definition of appropriate numerical traces of the fields on a face shared by two neighboring cells. This discretize method is highly flexible with regards to the type of mesh that can be used either fully unstructured or hybrid structured/unstructured, possibly including locally refined non-conforming zones. We will present the status of the development of such high order time-domain and frequency-domain solvers, and their application to nanoscale ligh/matter interaction problems involving local and non-local dispersion effects. The resulting solvers are integrated in a software suite dedicated to nanophotonics/nanoplasmonics under development at Inria Sophia Antipolis-Méditerranée research center.