Imperial College London
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ProfessorEmilianoCortes

Faculty of Engineering, Department of Materials

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e.cortes

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Mancini:2024:10.1038/s41566-024-01410-5,
author = {Mancini, A and Nan, L and Berté, R and Cortés, E and Ren, H and Maier, SA},
doi = {10.1038/s41566-024-01410-5},
journal = {Nature Photonics},
title = {Multiplication of the orbital angular momentum of phonon polaritons via sublinear dispersion},
url = {http://dx.doi.org/10.1038/s41566-024-01410-5},
year = {2024}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Optical vortices (OVs) promise to greatly enhance optical information capacity via orbital angular momentum multiplexing. The need for the on-chip integration of orbital angular momentum technologies has prompted research into subwavelength-confined polaritonic OVs. However, the topological order imprinted by the structure used for transduction from free-space beams to surface polaritons is inherently fixed after fabrication. Here we overcome this limitation via dispersion-driven topological charge multiplication. We switch the OV topological charge within a small frequency range (~3%) by leveraging the strong sublinear dispersion of low-loss surface phonon polaritons on silicon carbide membranes. Applying the Huygens principle, we quantitatively evaluate the topological order of experimental OVs detected by near-field imaging. We further explore the deuterogenic effect, which predicts the coexistence of multiple topological charges in higher-order polaritonic OVs. Our work demonstrates a viable method to manipulate the topological charge of polaritonic OVs, paving the way for the exploration of novel orbital-angular-momentum-enabled light–matter interactions at mid-infrared frequencies.
AU  - Mancini,A
AU  - Nan,L
AU  - Berté,R
AU  - Cortés,E
AU  - Ren,H
AU  - Maier,SA
DO  - 10.1038/s41566-024-01410-5
PY  - 2024///
SN  - 1749-4885
TI  - Multiplication of the orbital angular momentum of phonon polaritons via sublinear dispersion
T2  - Nature Photonics
UR  - http://dx.doi.org/10.1038/s41566-024-01410-5
ER  -
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