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arXiv · 1211.5240

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
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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.

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Daryl M. Beggs, Thomas F. Krauss, L. Kuipers, Tobias Kampfrath. 2012-11-22. Ultrafast tilting of the dispersion of a photonic crystal and adiabatic spectral compression of light pulses. https://doi.org/10.1103/physrevlett.108.033902

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