High-resolution surface-plasmon resonance real-time imaging.
We use surface-plasmon resonance in a silver film to obtain high-resolution real-time images of a transparent dielectric sample in contact with it. A new aspect of the work was the use of radially polarized illumination from a LED at 530 nm to obtain speckle-free images with high spatial resolution along all orientations. The sensitivity to refractive index changes in the sample is estimated to be better than 10(-3), and the modulation transfer function out to spatial frequency 1 microm(-1) was measured.
Vander
R
R
Department of Physics, Technion-Israel Institute of Technology, Haifa, Israel.
Lipson
S G
SG
D015374:Biosensing Techniques; D001773:Blood Cells / Q000648:ultrastructure*; D012031:Refractometry / Q000379:methods; D020349:Surface Plasmon Resonance / Q000295:instrumentation / Q000379:methods*