<p>Optimization of the geometry of a metallic bowtie gap at radio frequency is
presented in this thesis. Since the design and fabrication of a plasmonic device (nanogap)
at nanoscale is challenging, the results of this study can be used to estimate the best
design parameters for nanogap structure. The geometry of the bowtie gap including gap
size, tip width, metal thickness, and tip angle are investigated at macroscale to find the
maximum electric field enhancement across the gap. This thesis focuses on the
simulation portion of a work that consists of experimental and simulation platforms.
The simulation platform is created by NEC modeling system using antenna
segments. The results indicate that 90? bowtie with 0.06 ? gap size has the most |Et|2
enhancement. Different amounts of enhancement at different frequency ranges are
explained by mode volume. The product of the mode volume and |Et|2 enhancement is
constant for different gap structures and different frequencies.
| Identifer | oai:union.ndltd.org:PROQUEST/oai:pqdtoai.proquest.com:10242847 |
| Date | 30 November 2016 |
| Creators | Byambadorj, Tsenguun |
| Publisher | Marquette University |
| Source Sets | ProQuest.com |
| Language | English |
| Detected Language | English |
| Type | thesis |
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