| Issue |
EPL
Volume 149, Number 6, March 2025
|
|
|---|---|---|
| Article Number | 66001 | |
| Number of page(s) | 7 | |
| Section | Condensed matter and materials physics | |
| DOI | https://doi.org/10.1209/0295-5075/adbb16 | |
| Published online | 17 March 2025 | |
Space-charge–driven second harmonic generation in nanometric conductors
1 MPQ, UMR 7162, Université Paris Cité - 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
2 Aix-Marseille Université, CNRS, Centrale Med, Institut Fresnel - 13013 Marseille, France
Received: 23 January 2025
Accepted: 27 February 2025
The properties of harmonic waves, carrying a longitudinal electric field and a space-charge density, made up of conduction electrons, are investigated in metals and semi-conductors with the help of a classical analysis. The associated dispersion curve is worked out. These findings are further applied to unravel a novel second harmonic generation mechanism for an electromagnetic wave shone on a nanometric wire, with frequency ranging from the IF up to UV domain. The calculated efficiency in semi-conductors might be higher by 12 orders of magnitude than in metals. Observable predictions are made.
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