Chemistry Publications
Document Type
Article
Publication Date
8-1-2019
Journal
Optics letters
Volume
44
Issue
15
First Page
3865
Last Page
3868
URL with Digital Object Identifier
https://doi.org/10.1364/OL.44.003865
Abstract
Infrared (IR) antennas made of metallic nanostructures are widely tunable from the near- to the far-IR range. They can be utilized for a variety of applications such as light harvesting and photonic filters, and their structural linear or circular anisotropy can be exploited to further enhance the sensitivity of spectroscopic measurements. Here gold dendritic fractal structures that were optimized to exhibit multiple resonances in the mid-IR range were characterized using a scattering-type scanning near-field optical IR microscope. The spatially resolved IR maps associated with the individual modes serve as a basis to understand the mode evolution between each fractal generation.
