Ultrafast tilting of the dispersion of a photonic crystal and adiabatic spectral compression of light pulses

Daryl M. Beggs, Thomas F. Krauss, L. Kuipers, Tobias Kampfrath

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)
2 Downloads (Pure)

Abstract

We demonstrate, by theory and experiment, the ultrafast tilting of the dispersion curve of a photonic-crystal waveguide following the absorption of a femtosecond pump pulse. By shaping the pump-beam cross section with a nanometric shadow mask, different waveguide eigenmodes acquire different spatial overlap with the perturbing pump, leading to a local flattening of the dispersion by up to 11%. We find that such partial mode perturbation can be used to adiabatically compress the spectrum of a light pulse traveling through the waveguide.

Original languageEnglish
Article number033902
Pages (from-to)-
Number of pages5
JournalPhysical Review Letters
Volume108
Issue number3
DOIs
Publication statusPublished - 18 Jan 2012

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