On the Large Near-Field Enhancement on Nanocolumnar Gold Substrates.

ABSTRACT: One of the most important and distinctive features of plasmonic nanostructures is their ability to confine large electromagnetic fields on nanometric volumes; i.e., the so-called hot spots. The generation, control and characterization of the hot spots are fundamental for several applications, like surface-enhanced spectroscopies. In this work, we characterize the near-field distribution and enhancement of nanostructured gold thin films fabricated by glancing angle deposition magnetron sputtering. These films are composed of columnar nanostructures with high roughness and high density of inter-columnar gaps, where the electromagnetic radiation can be confined, generating hot spots. As expected, the hot spots are localized in the gaps between adjacent nanocolumns and we use scattering-type s

SUBMITTER: Diaz-Nunez P 

PROVIDER: S-EPMC6763449 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature