Optical seminar | 11 December 2020

Alex
 
ITMO University
Investigation of photonic nanostructures for perovskite optoelectronic devices (PhD attestation)
Abstract

In this talk, I will present the results of numerical and experimental studies of different photonic nanostructures for perovskite optoelectronic devices. I'll tell you about the optical properties of perovskite-based nanostructures and their applications for topological, microdisk, and LED light enhancement.
 

Alex
 
ITMO University
Regimes of optical coupling in composite dielectric structures (PhD attestation, in Russian)
Abstract

Composite dielectric structures such as oligomers, which consist of individual nanoparticles, provide a more advanced means to manipulate light compared to individual nanoparticles of the same shape. This is due to optical coupling - hybridization of eigenmodes of individual nanoparticles forming a set of quasi-normal modes. In the case of strong optical coupling regime, mode frequencies exhibit a Rabi splitting which can be observed in scattering spectra. This talk is devoted to the conditions of a strong optical coupling regime in a dimer of dielectric nanopillars. I am also going discuss the coupling mechanism in the case when the nanopillars are grown together (overlapped). Finally, I will describe the study of the dimer modes in the weak coupling regime using the 'optical downfolding' method.