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Multilayered plasmonic covers for comblike scattering response and optical tagging.
Francesco Monticone1, Christos Argyropoulos1, Andrea Alù1
1Department of Electrical and Computer Engineering, The University of Texas at Austin, 1 University Station C0803, Austin, Texas 78712, USA.
Physical Review Letters
|August 29, 2014
Summary
Multilayered plasmonic particles offer tunable optical scattering. These engineered particles enable sharp, comblike responses and strong superscattering, ideal for advanced optical tagging applications.
Area of Science:
- Nanophotonics and Plasmonics
- Optical Metamaterials
Background:
- Tailoring optical scattering responses is crucial for advanced photonic applications.
- Multilayered plasmonic structures offer unique opportunities for manipulating light-matter interactions.
Purpose of the Study:
- To explore the potential of multilayered plasmonic particles for precise control over optical scattering.
- To investigate the realization of degenerate cloaking and resonant states at closely spaced frequencies.
- To synthesize ultrasharp comblike scattering and strong superscattering states coupled to invisibility.
Main Methods:
- Utilizing the interplay of localized surface plasmons in stacked thin shells.
- Designing multilayered plasmonic particles to achieve specific optical responses.
- Analyzing the coupling of scattering states to invisible states.
Main Results:
- Achieved peculiar degenerate cloaking and resonant states at arbitrarily close frequencies.
- Demonstrated ultrasharp comblike scattering responses.
- Synthesized staggered, strong superscattering states closely coupled to invisible states.
- Showcased robustness to material losses and background medium variations.
Conclusions:
- Multilayered plasmonic particles provide a versatile platform for tailoring optical scattering.
- The demonstrated control over scattering phenomena, including superscattering and cloaking, is significant.
- The robustness of these structures makes them highly suitable for practical applications like optical tagging.
