Towards chiral acoustoplasmonics
The possibility of creating and manipulating nanostructured materials encouraged the exploration of new strategies to control electromagnetic properties. Among the most intriguing nanostructures are those that respond differently to helical polarization, i.e., exhibit chirality. Here, we present a s...
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Main Authors | , , , , |
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Format | Journal Article |
Language | English |
Published |
10.12.2022
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Subjects | |
Online Access | Get full text |
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Summary: | The possibility of creating and manipulating nanostructured materials
encouraged the exploration of new strategies to control electromagnetic
properties. Among the most intriguing nanostructures are those that respond
differently to helical polarization, i.e., exhibit chirality. Here, we present
a simple structure based on crossed elongated bars where light-handedness
defines the dominating cross-section absorption or scattering, with a 200%
difference from its counterpart (scattering or absorption). The proposed chiral
system opens the way to enhanced coherent phonon excitation and detection. We
theoretically propose a simple coherent phonon generation (time-resolved
Brillouin scattering) experiment using circularly polarized light. In the
reported structures, the generation of acoustic phonons is optimized by
maximizing the absorption, while the detection is enhanced at the same
wavelength -- and different helicity -- by engineering the scattering
properties. The presented results constitute one of the first steps towards
harvesting chirality effects in the design and optimization of efficient and
versatile acoustoplasmonic transducers. |
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DOI: | 10.48550/arxiv.2212.05272 |