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

S. Yusofsani, M. Kolesik

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
JournalEuropean Physical Journal: Special Topics
DOIs
StateAccepted/In press - 2021

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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