OSE Seminar by Prof. Alejandro Manjavacas on Lattice resonances in arrays of metallic nanostructures
Posted: September 22, 2020
Date: Thursday, September 24, 2020
Time: 12:15 PM to 1:15 PM
Location: via Zoom
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Periodic arrays are an exceptionally interesting arrangement for plasmonic nanostructures due to their ability to support strong collective lattice resonances, which arise from the coherent multiple scattering enabled by the array periodicity. Thanks to these exceptional properties, periodic arrays are being exploited in a wide variety of applications, including ultrasensitive biosensing, nanoscale light emission, and color printing, to cite a few.
The goal of this seminar is to provide an instructive introduction to this topic. To that end, we will start by discussing how the interplay between the response of the individual constituents of the array and their collective interaction determines the ultimate limits of the field enhancement provided by a periodic array. We will also discuss the response of arrays with multi-particle unit cells using an analytical approach based on plasmon hybridization, which provides a simple and efficient way to design periodic arrays with engineered properties. We will pay particular attention to bipartite arrays and show how, depending on the relative position of the particles within the unit cell, these systems can support super- or subradiant lattice resonances with very different optical responses.
Prof. Alejandro Manjavacas received his M.S. and Ph.D degrees from Universidad Complutense de Madrid in 2009 and 2013, respectively, working under the supervision of Prof. Garcia de Abajo. After completion of his Ph.D., he moved to Rice University in 2013 as the J. Evans Attwell Welch postdoctoral fellow working in the group of Prof. Peter Nordlander. Since the summer of 2015, he is an Assistant Professor in the Department of Physics and Astronomy at the University of New Mexico. Prof. Manjavacas is the recipient of several awards including the RSEF-BBVA Foundation award to the best young theoretical physicist in Spain and the NSF Career Award. The focus of his research is to understand the fundamentals of the light-matter interaction at the nanoscale. He has co-authored over 70 articles and reached over 4600 citations with a h factor of 31 (Google Scholar).