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

Beggs, Daryl M., Krauss, Thomas F., Kuipers, L. and Kampfrath, Tobias 2012. Ultrafast tilting of the dispersion of a photonic crystal and adiabatic spectral compression of light pulses. Physical Review Letters 108 (3) , 033902. 10.1103/PhysRevLett.108.033902

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 0031-9007
Last Modified: 04 Jun 2017 09:41
URI: http://orca.cf.ac.uk/id/eprint/98178

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