Aluminum-doped nano-layered metamaterials with hyperbolic dispersion for ultrafast light control on nanoscale

When
Start: 12/04/2017 - 4:15pm
End  : 12/04/2017 - 5:15pm

Category
Applied Math Seminar

Speaker
Prof. Lyuba Kuznetsova (Department of Physics, SDSU)

Abstract

A special class of nano-layered hyperbolic metamaterials has received a lot of attention recently due to their unique optical property namely that the dispersion of the dielectric constant for hyperbolic metamaterials exhibits a topological transition in the isofrequency surface from an ellipsoid to a hyperboloid. The unique property of propagating waves in such a metamaterial is that the wavevectors have unbounded magnitudes which allows dramatic increase of the photon density of states. The presence of these additional electromagnetic states allows the modification of the spontaneous emission rate. Exploring these effects with aluminum-doped metamaterials could lead to an efficient integration into current technology for applications in modern communications, super-resolution imaging, and label-free detection of organic and biological systems.

This talk will cover a few computational approaches that are promising for designing aluminum-doped metamaterials with hyperbolic dispersion. In particular, I will introduce our recently developed approach to the analysis of spectroscopic ellipsometry data to extract the optical permittivity for a nano-layered Al:ZnO/ZnO metamaterial. I will discuss intriguing nanocavity devices based on aluminum\dielectric nano-layered metamaterials which allow light confinement beyond diffraction limit. I will also discuss a size-dependent bio-particle sensing technique based on microcavities. I will conclude with our current research on using aluminum-doped metamaterials with hyperbolic dispersion for ultrafast light control on nanoscale.

Where
Mondays 4:15-5:15 pm Emmy Noether Rm Millikan 1021 Pomona College