Scattering of spatial optical solitons by subwavelength air holes

Jethro H. Greene*, Allen Taflove

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Using the finite-difference time-domain method, we model the propagation of spatial optical solitons having two orthogonal electric field vector components, and the scattering of such solitons by compact subwavelength air holes (i.e., abrupt dielectric discontinuities in the direct paths of the solitons). Our propagation and scattering studies assume a realistic glass characterized by a three-pole Sellmeier linear dispersion, an instantaneous Kerr nonlinearity, and a dispersive Raman nonlinearity. An unexpected spatial soliton scattering phenomenon is observed: the coalescence of the scattered electromagnetic field into a propagating lower-energy spatial soliton at a point many tens of wavelengths beyond the scattering air hole. Overall, our computational technique is general, and should permit future investigations and design of devices exploiting spatial soliton interactions in background media having submicrometer air holes and dielectric and metal inclusions.

Original languageEnglish (US)
Pages (from-to)760-762
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number11
StatePublished - Nov 2007
Externally publishedYes


  • Finite-difference time-domain (FDTD)
  • Nonlinear Schrödinger (NLS)
  • Unidirectional pulse propagation equation (UPPE)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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