Department of Physics, Engineering Physics & Astronomy

Queen's University
Search Type
Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

Nanophotonic Structures for Sensing: Exploiting Photonic Crystal and Metamaterial Concepts

Richard De La Rue
University of Glasgow

Friday, April 26, 2013
10:30 AM @ Stirling 261

Abstract:

Nanophotonic device structures provide a promising technological base for reliable sensing in a variety of applications, including bio-medicine, the environment and gas detection. This seminar presentation will review some recent progress based on photonic crystals and metamaterials concepts. Photonic crystal principles provide a promising approach as nanophotonic structures for a variety of sensing applications including detection of small quantities of organic materials quite generally, biomedical sensing down to the single molecule level and environmental sensing, e.g. for air and water quality measurement purposes. Metamaterial surfaces in the form of planar arrays of split-ring resonators (SRRs) have been the subject of numerous investigations. We have investigated the characteristics and possible applications of the specific SRR geometry known as the asymmetric SRR, which exhibits two peaks in its reflection spectrum, as well as a trapped mode, in which most of the incident light is absorbed. The seminar presentation will consider both the vitally important sensitivity issues and the impact of localising the material of interest in sensing.

Reference: Basudev Lahiri, Scott G. McMeekin, Richard M. De La Rue, and Nigel P. Johnson, Enhanced Fano resonance of organic material films deposited on arrays of asymmetric split-ring resonators (A-SRRs), Optics Express, 21(8), pp. 9343 - 9352, 22nd April (2013).