Near-field analysis of discrete bowtie plasmonic nanoantennas Article uri icon

abstract

  • A discrete antenna is a discretized version of a traditional antenna design which enhances the antenna properties (such as field intensity, multi-band, compact size, and low sidelobe levels) of its traditional counterpart. In this work, a classical bowtie antenna is discretized using circular elements of different sizes. Numerical simulations and near-field optical scanning microscopy are performed on classical and discrete bowtie antennas in the infrared. Simulations show that discrete antennas have an increased bandwidth and an increased number of electric-field hotspots and near-field measurements confirm the increment of hotspots. These characteristics make discrete antennas potentially useful in applications where an extended region of localized electric field enhancements is of interest. © 2019 Wiley Periodicals, Inc.

publication date

  • 2020-01-01