Pr. François Lagugné-Labarthet

Canada Research Chair in Photonics.,Western Nanofabrication Facility Scientific Director
Department of Chemistry,Western University
London, Ontario, Canada

flagugne uwo.ca and Twitter : @lagugne

http://publish.uwo.ca/ flagugne ; http://www.uwo.ca/fab/

The use of efficient sensing technologies appears to be a field with tremendous activity mainly due to the connectivity of sensing devices on global network (internet of things and services) enabling immediate sharing of information valuable in a variety of fields such as industrial processes, food quality control, environmental monitoring and biomedical assessment. In this context, the development of optical sensing devices appears to provide advantages such as high portability (small footprint, little sample preparation) and, in ideal conditions, an excellent specificity of detection. Our group aim at developing metamaterials interfaced with spectroscopy and optical methods to enhance the detection of a variety of materials and biomaterials using advanced nano- and micro-scales optical imaging. Specifically, plasmon-mediated enhancements are used to further facilitate i)-the increase of surface-sensitivity of spectroscopic measurements and to ii)- increase local spatial resolution of the optical measurement beyond the diffraction limit.

In this seminar, we will review several research directions led in our group including the design and fabrication of advanced surface-enhanced platforms for Raman and Infrared measurements,1,2 development of Tip-enhanced Raman spectroscopy to probe biological processes at a sub 10 nm scale,3 and the extension of plasmon-mediated sensing in the mid-infrared range using synchrotron beamline.4