Double-grating-structured light microscopy using plasmonic nanoparticle arrays.
Structured illumination increases the spatial bandwidth of optical microscopes. We demonstrate bandwidth extension using a physical grating placed close to the sample. This comprises an array of elongated nanoparticles, whose localized surface plasmon resonance is polarization dependent. By arranging the particle orientation to vary with position the grating can be moved by changing the input polarization. A projected optical grating provides an additional independent mechanism for bandwidth extension. Experimental results showing bandwidth improvement in one direction are presented, and the measures necessary to extend the technique for routine imaging are discussed.
Liu
S
S
Institute of Biophysics and Optical Science, Department of Electrical and Electronic Engineering, University Park, University of Nottingham, NG7 2RD, UK.
Chuang
Chin-Jung
CJ
See
C W
CW
Zoriniants
G
G
Barnes
W L
WL
Somekh
M G
MG
D005240:Feasibility Studies; D005453:Fluorescence; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles; D008856:Microscopy, Fluorescence / Q000295:instrumentation*; D020349:Surface Plasmon Resonance
D006046:Gold