A review of light scattering by metallic nanostructures

International Conference and Exhibition on Mesoscopic & Condensed Matter Physics

June 22-24, 2015 Boston, USA

Mahi R Singh

The University of Western Ontario, Canada

Posters-Accepted Abstracts: J Material Sci Eng

Abstract :

There is a considerable interest in developing nanoscale switching and sensing devices using metallic nanomaterial hetero structures. When light falls on the surface of the metal, surface plasmons couple with photons to create surface plasmon polaritons (SPPs). We will discuss theoretically and experimentally the SPPs in metallic nano-hole structures. We have investigated theoretically and experimentally the light-matter interaction in metallic nano-hole structures. The surface plasmon polaritons (SPPs) of this structure are calculated by using the transmission line theory and the Bloch theorem. Using the transfer matrix method we have found that the energies of SPPs are quantized and systems can have several SPPs depending on the radius and periodicity of the structures. A theory of the scattering cross section is developed usingthe Greens function method. A fairly good agreement between theory and experiments are found. It is found that energySPP peaks in the spectrum can be modified by changing the periodicity of the nano-hole structure.This can achieved by applying an external laser and external pressure pulse on the structure. The present findings suggested that these systems can be used as nanosensors and nanoswitches for medical and engineering applications.

Biography :

Mahi R Singh received both MSc (1970) and PhD (1976) degrees from Banaras Hindu University, Varanasi in Condensed Matter Physics. After that he was awarded an Alexander von Humbold Fellow in Stuttgart University, Germany from 1979 to 1981. He also worked as Research Associate at University of North Carolina, Chapel Hill, USA. After that he joined the University of Western Ontario as Associate Professor in 1985. Currently he is Professor in this university. He also worked as a Chief Researcher at CRL HITACHI, Tokyo between November 1992 and May 1993. He was the director of the Centre of Chemical Physics at the University of Western Ontario, Canada. He has worked in many research are of science and technology including nanoscience, nanotechnology, nanophotonics, plasmonics, optoelectronics, photonic crystals, Metamaterials, semiconductor here structures, high temperature superconductors, positron annihilation, Josephson Junctions, many body theories, condensed matter physics, semiconductor devices, Thermal Transport, DNA Molecules and DNA wires and so on. He has published more than 250 papers in international journals. He has written several books which are used as text books at UWO, Canada. He has organized several international conferences. He has been invited as a plenary and an invited speaker in several international conferences throughout the world.

Email: msingh@uwo.ca