Friday 6th of February, 2015 at 11.00 a.m.
Room A209, Polo Scientifico e Tecnologico “Fabio Ferrari”
Dr. Oleskiy Anopchenko
University of Rome "La Sapienza"
“Bloch electromagnetic surface wave biosensors”
Abstract:
After a brief introduction to Bloch surface waves (BSW) in one-dimensional photonic crystals, the basic concept
behind a BSW biosensing platform which is being developed within the EU STREP project BILOBA will be presented.
The platform operates in both a label-free mode, where small refractive index changes at the surface are detected,
and a fluorescence mode, where the fluorescence from a label dye in the proximity of the surface is collected.
The optimization of angular-resolved BSW biosensors in a label-free mode will be discussed in terms of the analytical
limit of detection (without an analyte), LoD, and a figure of merit. Using the dependence of the LoD on BSW
resonance parameters and assuming certain robustness criteria, I will show that BSW sensors are tolerant to
fabrication errors in photonic crystal layer thicknesses. An example of efficient near-infrared fluorescence collection
from a cyanine dye on the same labelfree integrated platform will be shown. I will also describe our ellipsometric
angular-resolved sensing test bench and give an example of protein detection.
Contacts:
Staff di Dipartimento di Fisica
0461 28-1504-1575-2042
df.supportstaff@unitn.it
Scientific Coordinator
Prof. Lorenzo Pavesi
Via Sommarive, 14 - 38123 Povo (Trento), Italy - Tel. +39 0461/281504-1575-1661, Fax +39 0461/283934