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Interferometric control of the absorption in optical patch antennas.
Caroline Lemaître1, Emmanuel Centeno1, Antoine Moreau2
1Université Clermont Auvergne, CNRS, Institut Pascal, F-63000, Clermont-Ferrand, France.
Scientific Reports
|June 9, 2017
Summary
Optical patch nano-antennas have unique optical properties. Understanding their cross-section and response to varying incidence angles is crucial for applications like optical nanometric set-squares.
Area of Science:
- Nanophotonics and Plasmonics
- Optical Metamaterials
Background:
- Optical patch nano-antennas exhibit significant absorption, field enhancement, and concentration capabilities.
- Their cross-section and response at non-normal incidence angles require further investigation.
Purpose of the Study:
- To elucidate the large cross-section of patch nano-antennas.
- To understand the influence of incidence angle on nano-antenna performance.
Main Methods:
- Modeling nano-antennas as dual-sided cavities.
- Analyzing the behavior of odd and even resonances with varying incidence angles.
Main Results:
- A dual-sided cavity model explains the large cross-section.
- Odd resonances show high absorption at normal incidence, decreasing with increased angle.
- Even resonances are not excited at normal incidence.
Conclusions:
- The dual-sided cavity model provides a comprehensive understanding of patch nano-antenna behavior.
- These findings facilitate the application of nano-antennas as optical nanometric set-squares.
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