Review Article

Ultra-Sensitive Colorimetric Plasmonic Sensing and Microfluidics for Biofluid Diagnostics Using Nanohole Array

Figure 2

Plasmonic nanohole array transmitting different colors based on periodicity of the holes. (a) Images of various nanohole array in transmission mode under a white light illumination. (b) A SEM image of holes composing the letter “G” with periodicity of 330 nm. The transmitted light image of the structure is shown in the inset. (c) Transmission spectra of the nanohole arrays are shown in (a). (d) Dependence of transmission peak of the nanohole array on the period of the holes. Adapted from [88].
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