presenter：lionel aigouy (espci paris/sorbonne university)
topic：nano-optics and nano-thermics with fluorescence-based scanning optical microscopy
time：10:00 am, oct 18th (friday)
location：909-b
abstract:：
in this talk, i will present a few results of our group concerning the nanoscale characterization of metallic and dielectric nanostructures using fluorescent-based scanning probe microscopy. in the case of gold plasmonic structures, we will show that the technique can be used to map very easily the dipolar pattern of the local electromagnetic field. in the case of plasmonic dimers (two au nanoparticles in interaction), we will characterize the coupling between the two nanoparticles as a function of their distance. i will also present some images obtained on dielectric nanoparticles, which show that dielectric materials also exhibit enhanced local electromagnetic fields. finally, i will show that the technique of fluorescent scanning probes can be used to map the temperature distribution on micro and nanowires heated by an electrical current.
biography：
dr. lionel aigouy (director of research, cnrs) has a scientific background in physics (optics and materials science) and he is currently working on the nanoscale study of materials and devices using nano-optical and thermal microscopy by fluorescent techniques. he performed a phd in physcis at the university of montpellier in france on semiconductors quantum wells, and a post-doctoral research at the city university of new york studying devices by optical characterization techniques. he then joined the cnrs at espci in paris as a researcher in 1997.
contact：prof. sun baoquan