Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.213901
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Funding
- EPSRC
- Netherlands Ministry of Economic Affairs
- Netherlands Ministry of Education, Culture and Science
- NanoNextNL of the Government of the Netherlands
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO)
- EPSRC [EP/F001622/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F001622/1] Funding Source: researchfish
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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 mu 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.
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