Figure 1
From: Combination of scanning probe technology with photonic nanojets
Traditional imaging versus microbead imaging. (a) SEM micrograph of a structure consisting of the “iit” logo. As shown in the inset, each letter consists of equally spaced lines with a periodicity of 380 nm. Scale bar is 20 µm, inset scale bar is 500 nm. (b) Optical image of the structure using 450 nm transmitted illumination with a 50×, 0.5 NA. Scale bar is 20 µm. The periodic lines of each letter cannot be resolved, as shown in the intensity plot of the inset. (c) Virtual image obtained using the microbead. Scale bar is 20 µm. In this case, the image formed through the microbead can resolve the periodic lines (inset). Note that due to the limited field of view of the microbead, only 3 lines are visible.
