Plasmonic nano- and meta- materials

Date & Time: 
Fri, 09/15/2017 - 2:00pm
Speaker: 
Vladimir Drachev
Affiliation: 
University of North Texas
Location: 
Discovery Park B155
Abstract: 

Light-matter interaction at the nanometer scale has turned into a very fast growing field of research known as nano-optics and nano-photonics. The main motivation comes from the potential of nano-optics to extend concepts and functionalities of conventional optics down to the nanometer scale, towards ultra-compact photonic and imaging devices that may overcome the diffraction limit. Nano-plasmonics is expected to have a strong impact in the areas of chip-scale optical interconnects and bio-medical applications. Artificially engineered materials with optical effective magnetism and negative refractive index employ the effect of circular currents in double layered plasmonic nanostructures separated by a dielectric spacer. Multilayer metal-dielectric films enable hyperbolic dispersion for the propagating waves with a high density of states and acceptance of high wavevector light waves. Two examples of our accomplishments in this field will be discussed. One of them is related to the hyperbolic metamaterials. Second concerns a new type of localized plasmons, namely magnetic plasmons, which are spin-dependent and can be excited in Co nanoparticles. It includes our experiments on hyperbolic metamaterials for life-time engineering and subwavelength nano-photolithography. Development and study of high-quality plasmon UV resonance in spin-polarized single-domain magnetic nanoparticles like cobalt. Such plasmons make possible molecular sensing based on resonant UV surface enhanced Raman scattering.

Vladimir Drachev photo
Biography: 

Dr. Vladimir Drachev received his M.S. degree in physics from Novosibirsk State University, Russia, and the Ph.D. in experimental physics from Russian Academy of Sciences, Institute of Automation & Electrometry and Institute for Semiconductor Physics, in 1995. From 1999 to 2001, he was a Visiting Scientist at New Mexico State University, then a Senior Scientist at Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University for 10 years till 2012. Current research interests include nanophotonics, nanofabrication, optics, nonlinear optics and spectroscopy of plasmonic nanostructures, and applications in biosensing and metamaterials. Dr. Drachev has published more than 90 papers in refereed journals, 8 book chapters and received 5 patents. His current h-index is 41 with more than 5090 total citations according to Google Scholar or 33 Web of Science and Scopus.