Figure 4
From: Super-focusing of center-covered engineered microsphere
Simulation and experimental results of the beam size for center-covered engineered microspheres at different cover ratios.
(a) Dependence of the beam width of the photonic nanojet on cover ratio. (b) Normalized intensity distribution of the cross-section of the photonic nanojet along the optical axis captured by the CMOS camera. The cover ratio is labelled under each figure and the length of the frames are 5 μm.
