Nonlinear optics in the X-ray regime: Nonlinear waves and self-action effects

C. Conti*, A. Fratalocchi, G. Ruocco, F. Sette

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


We study the nonlinear refraction of X-rays in highly ionized condensed matter by using a classical model of a cold electron plasma in a lattice of still ions coupled with Maxwell equations. We discuss the existence and stability of nonlinear waves. As a real-world example, we consider beam self-defocusing in crystalline materials (B, C, Li, Na). We predict that nonlinear processes become comparable to the linear ones for focused beams with powers of the order of mc3/r0 (≈10 GW), the classical electron power. As a consequence, nonlinear phenomena are expected in currently exploited X-ray Free-Electron Lasers and in their future developments.

Original languageEnglish (US)
Pages (from-to)8324-8331
Number of pages8
JournalOptics Express
Issue number12
StatePublished - Jun 9 2008
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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