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Interplay between electric and magnetic effect in adiabatic polaritonic systems
Alessandro Alabastri1, Andrea Toma, Carlo Liberale
1Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy.
Optics Express
|April 3, 2013
Summary
Researchers demonstrate adiabatic compression of polaritonic waves on metallic nanostructures using oscillating electric potentials. This finding links the lightning-rod effect to adiabatic compression and suggests applications for terahertz (THz) nano-generators.
Area of Science:
- Plasmonics and Nanophotonics
- Electromagnetism
- Condensed Matter Physics
Background:
- Polaritonic waves offer unique light-matter interactions.
- Metallic nanostructures can confine and manipulate electromagnetic fields.
- Adiabatic compression is a key phenomenon for controlling wave propagation.
Purpose of the Study:
- To investigate the possibility of adiabatic compression of polaritonic waves on metallic conical nanostructures.
- To explore the role of oscillating electric potentials and electromagnetic wave excitation.
- To establish a connection between the classical lightning-rod effect and adiabatic compression.
Main Methods:
- Analysis of polaritonic wave behavior on metallic conical nanostructures.
- Comparison between quasi-dynamic regime (oscillating electric potential) and electromagnetic wave excitation.
- Systematic analysis from electrostatic to full electromagnetic regimes.
- Derivation of equations to determine electric and magnetic contributions.
Main Results:
- Adiabatic compression of polaritonic waves is achievable using oscillating electric potentials.
- The classical lightning-rod effect is directly related to adiabatic compression.
- Magnetic contribution has a minor role in compression but causes spectral blue shift and can tune resonances.
- Metal permittivity and source characteristics dictate the adiabatic compression form.
Conclusions:
- Adiabatic compression of polaritonic waves can be realized on metallic conical nanostructures.
- The findings provide insights into controlling light at the nanoscale.
- Potential applications include the development of terahertz (THz) nano-metric generators.
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