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Updated: Aug 23, 2025
09:00
Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
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Massive and massless plasmons in germanene nanosheets
Michele Pisarra1, Cristian Vacacela Gomez2, Antonello Sindona3,4
1Gruppo Collegato di Cosenza, Sezione dei Laboratori Nazionali di Frascati (LNF), Istituto Nazionale di Fisica Nucleare (INFN), Cubo 31C, 87036, Rende, CS, Italy.
Scientific Reports
|November 4, 2022
Summary
Germanene monolayers support infrared massless and massive plasmon modes. Their interplay can be tuned for advanced optoelectronic and plasmonic applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Atomically thin crystals can host unique electronic states.
- Linear and parabolic dispersions enable charge density modes for light confinement.
Purpose of the Study:
- Investigate germanene as a platform for plasmon excitations.
- Assess the role of different germanene samples in supporting these modes.
Main Methods:
- Time-dependent density-functional theory (TDDFT).
- Random-phase approximation (RPA).
- Bethe-Salpeter equation (BSE) formalism.
Main Results:
- Freestanding and supported germanene sustain infrared massless plasmon modes (optical and acoustic components).
- Specific geometries support infrared massive plasmon modes with two parabolic charge carrier families.
- Interplay of massless and massive plasmons is tunable via extrinsic conditions or deformations.
Conclusions:
- Germanene is a promising material for infrared plasmonics.
- Tunable plasmon modes in germanene are key for optoelectronic applications.
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