Giant asymmetric self-phase modulation in superconductor thin films

Charles W. Robson, Fabio Biancalana

Research output: Contribution to journalArticle

Abstract

Self-phase modulation (SPM) of light pulses is found to occur strongly, at low incident intensities, in the coupling of light with superconductors. We develop a theory from a synthesis of the time-dependent Ginzburg-Landau (TDGL) equation and basic electrodynamics which shows the strongly non-linear phase accumulated in the interaction. Unusually, the SPM of the pulse in this system is found to be highly asymmetric, producing a strongly redshifted spectrum when interacting with a superconducting thin film, and it develops in just a few nanometers of propagation. In this paper we present theoretical results and simulations in the THz regime, for both hyperbolic secant and supergaussian-shaped pulses.

Original languageEnglish
Article number046001
JournalMaterials Research Express
Volume5
Issue number4
DOIs
Publication statusPublished - 13 Apr 2018

Keywords

  • nonlinear optics
  • pulse propagation
  • self-phase modulation
  • superconductivity
  • thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

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