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Near‐field analysis of discrete bowtie plasmonic nanoantennas
Author(s) -
Moreno Camilo,
MéndezLozoya Javier,
González Gabriel,
González Francisco J.,
Boreman Glenn
Publication year - 2020
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32108
Subject(s) - discretization , electric field , plasmon , optics , antenna (radio) , physics , bandwidth (computing) , near and far field , field (mathematics) , electromagnetic field , telecommunications , computer science , mathematics , mathematical analysis , quantum mechanics , pure mathematics
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.