Beyond Fowler–Nordheim model: harmonic generation from metallic nano-structures

Metallic structures interacting with electromagnetic fields are known to exhibit properties similar to those found in atoms and molecules, such as multi-photon and tunnel ionization. Developing this similarity beyond the electron emission current, we generalize the well-known Fowler–Nordheim model,...

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Bibliographic Details
Published inThe European physical journal. ST, Special topics Vol. 230; no. 23; pp. 4071 - 4079
Main Authors Yusofsani, S., Kolesik, M.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2021
Springer Nature B.V
Subjects
Atomic
Classical and Continuum Physics
Condensed Matter Physics
Electromagnetic fields
Electron emission
Finite Systems and Condensed Media
Harmonic generations
Intense Laser Matter Interaction in Atoms
Materials Science
Measurement Science and Instrumentation
Molecular
Nonlinear response
Optical and Plasma Physics
Optical pulses
Physics
Physics and Astronomy
Regular Article
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Summary:Metallic structures interacting with electromagnetic fields are known to exhibit properties similar to those found in atoms and molecules, such as multi-photon and tunnel ionization. Developing this similarity beyond the electron emission current, we generalize the well-known Fowler–Nordheim model, and predict a heretofore unrecognized source of nonlinear optical response from nano-structures exposed to illumination with intense optical pulses. We find that the harmonic generation by these structures is non-perturbative in the sense that higher harmonic orders can be almost as strong as the lower orders. At the same time, the predicted spectrum is distinct from the usual high-harmonic generation in that it does not exhibit a sharp cutoff.
ISSN:1951-6355
1951-6401
DOI:10.1140/epjs/s11734-021-00189-8