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Published on: September 5, 2017
Coherent control of plasmonic nanoantennas using optical eigenmodes
Sebastian Kosmeier1, Anna Chiara De Luca, Svetlana Zolotovskaya
1SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, UK.
Scientific Reports
|May 10, 2013
Summary
Researchers developed a new method for dynamic control of light at the nanoscale using optical eigenmodes. This technique enables selective addressing of plasmonic nanostructures, overcoming limitations of fixed field confinement for advanced applications.
Area of Science:
- Nanophotonics
- Plasmonics
- Electromagnetism
Background:
- Subwavelength focusing of electromagnetic fields near nanoplasmonic structures is established.
- A key limitation is the inflexible, geometry-dependent spatial confinement of these fields, hindering applications.
Purpose of the Study:
- To achieve selective and dynamic control over light focusing on plasmonic nanostructures.
- To overcome the fixed spatial confinement issue inherent in current nanoplasmonic designs.
Main Methods:
- Utilizing the principle of optical eigenmodes to decompose the light field.
- Coherent control of single and multiple plasmonic nanostructures within an array.
- Numerical and experimental validation of the proposed method.
Main Results:
- Demonstrated subwavelength, selective, and dynamic control of incident light.
- Achieved near-zero crosstalk in the coherent control of plasmonic nanoantennas.
- Showcased applicability in the presence of transmission aberrations, including holographic diffusers and multimode fibers.
Conclusions:
- The developed method offers a paradigm shift in addressing plasmonic nanostructures with light.
- Enables dynamic and precise manipulation of light fields for advanced nanophotonic applications.
