Electrical and Computer Engineering Seminar Series

The Dark Side of Plasmonics

Speaker

Aran Warren, PhD student

Institute

Department of Electrical and Computer Engineering University of Canterbury

Time & Place

Fri, 13 Aug 2021 14:00:00 NZST in Link 309 Lecture Theatre

Abstract

Vector laser beams with azimuthal or radial polarisation and vortex beams with angular momentum are interesting for applications such as super-resolution imaging, optical tweezers and quantum computing. Generation of such beams typically involves large optical components, however, recent advancements have seen the realisation of microscale laser sources generating these complex beams. Lattices of metal nanostructures exhibit plasmonic resonances with high quality factors and can generate complex laser beams when integrated with solution processed emitters such as quantum dots, organic dyes and perovskites. The lasing in these lattices originates from dark modes, also known as bound states in the continuum, which arise due to the suppression of scattering away from the lattice. In this seminar I will present the fabrication of plasmonic resonators from the single resonator to complex lattices. I will also introduce dark modes and how we are able to control them by tuning the lattice parameters as well as some promising applications for these lattices beyond lasing.

 

 

 

ALL WELCOME

REFRESHMENTS WILL BE PROVIDED

 

ECE Postgraduate Students are Expended to Attend