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

Beggs, Daryl M. ORCID: https://orcid.org/0000-0002-2231-7514, 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:	02 Nov 2022 10:18
URI:	https://orca.cardiff.ac.uk/id/eprint/98178

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