Ultrafast tunable optical delay line based on indirect photonic transitions

Beggs, Daryl M. ORCID: https://orcid.org/0000-0002-2231-7514, Rey, Isabella H., Kampfrath, Tobias, Rotenberg, Nir, Kuipers, L. and Krauss, Thomas F. 2012. Ultrafast tunable optical delay line based on indirect photonic transitions. Physical Review Letters 108 (21) , 213901. 10.1103/PhysRevLett.108.213901

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Abstract

We introduce the concept of an indirect photonic transition and demonstrate its use in a dynamic delay line to alter the group velocity of an optical pulse. Operating on an ultrafast time scale, we show continuously tunable delays of up to 20 ps, using a slow light photonic crystal waveguide only 300     μ m in length. Our approach is flexible, in that individual pulses in a pulse stream can be controlled independently, which we demonstrate by operating on pulses separated by just 30 ps. The two-step indirect transition is demonstrated here with a 30% conversion efficiency.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	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/98177

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