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. Author manuscript; available in PMC: 2014 Apr 24.
Published in final edited form as: Nat Commun. 2013;4:2305. doi: 10.1038/ncomms3305

Figure 3. Experimental demonstration of SPP divergence by the reconfigurable plasmofluidic lens.

Figure 3

(a) Scanning electron microscope image of the fabricated grating. Scale bar: 4 μm. (b) Leakage radiation image of SPPs when surface bubbles are absent. The image was recorded at the image plane. Scale bar: 20 μm. (c–e) Leakage radiation image of SPPs propagating through three surface bubbles with different diameters (27, 17, and 5 μm, respectively). The green dashed circle represents the surface bubble boundary on gold film. (f–g) Fourier plane images of SPPs in the absence and presence of a surface bubble, respectively.