Plasmon-Enhanced Sensing: Current Status and Prospects

Figure 4

(a) and (b) The field intensities at different resonance peaks of a single silver nanocube in contact with a glass substrate. (c) The near field distribution showing enhanced electromagnetic fields tightly confined near a periodic nanohole surface. One can see that the field distribution overlaps with the size of exosomes captured onto the sensing surface. (a)-(b) and (c) are adapted from [84, 85], respectively. (a)-(b): Copyright 2005, American Chemical Society. (c): Copyright 2014, Nature Publishing Group.