Christos Tserkezis

Technical University of Denmark, Department of Photonics Engineering, ├śrsteds Plads, Building 343, 2800 Kgs. Lyngby, Denmark

Plasmonic architectures for efficient control of light on the moderate and extreme nanoscale

Abstract

Plasmonics lies among the most prominent and widely explored fields in modern nanotechnology, owing its growth in popularity and importance mainly to the tremendous advances in nanofabrication that took place during the last 20 years. Novel experimental techniques allow for the controllable synthesis of elaborate plasmonic architectures, based to a large extent on noble metals. These systems are characterized by steadily decreasing length scales, thus demanding a description beyond classical electrodynamics (CED), and even opening the field of quantum plasmonics. Here we review our recent efforts in the theoretical understanding of the optical response of noble-metal nanostructures at the limits of CED, and discuss possible applications. We first explore periodic arrangements of canonical plasmonic units in optical metamaterials, where effects such as artificial optical magnetism, negative refraction, waveguiding, surface states and slow light can be observed. We then proceed to the study of single complex plasmonic units, so-called metamolecules, with few- or even sub-nm distances between their independent components, which strongly test the accuracy of CED, and show how such architectures can be exploited for the optical tracing and characterization of complex nanoscale procedures on an atomic level. Finally, we briefly discuss our most recent efforts to surmount the limitations of CED through hybrid semi-classical computational schemes, with or without the necessity of ab initio quantum mechanical calculations.



Date: 15/2/2016
Time:12:00 (coffee & cookies will be served at 00:00)
Place:FORTH Seminar Room 1