Fig. 1: The distortion-free large-view Chip-PSM. | Nature Communications

Fig. 1: The distortion-free large-view Chip-PSM.

From: Large field-of-view plasmonic scattering imaging and sensing of nanoparticles with isotropic point-spread-function

Fig. 1

a Experimental setup of Chip-PSM based on an upright microscope. A compact optical illumination device consists of an LED source, a polymer layer, a 1DPC, and a gold-coated glass slide. The plasmonic waves scattered by single nanoparticles and the rough surface are collected by the above air objective to form a Chip-PSM image. b single nanoparticle is illuminated by omnidirectional Surface plasmons. c Angular-dependent transmittance of the 1DPC (left Y-axis) and angular-dependent reflectance of the Gold-coated glass slide (right Y-axis), in the case of the Transverse-Magnetic (left part), and Transverse-Electric polarized (right part) incident light. d PSM images of single nanoparticles (diameter of 150 nm, n = 1.51) simulated via finite-difference time-domain methods under single-direction illuminations and omnidirectional illuminations. The white arrowhead line represents the propagation direction of the single-direction propagating surface plasmons. Scale bar, 100 nm.

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