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Ultrafast tunable optical delay line based on indirect photonic transitions

Beggs, Daryl M., 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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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: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 0031-9007
Last Modified: 04 Jun 2017 09:41

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