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Title: Ultrafast tunable optical delay line based on indirect photonic transitions
Authors: Beggs, Daryl Matthew
Rey, Isabella Helen
Kampfrath, Tobias
Rotenberg, Nir
Kuipers, L.
Krauss, Thomas Fraser
Keywords: QC Physics
Issue Date: 21-May-2012
Citation: Beggs , D M , Rey , I H , Kampfrath , T , Rotenberg , N , Kuipers , L & Krauss , T F 2012 , ' Ultrafast tunable optical delay line based on indirect photonic transitions ' Physical Review Letters , vol 108 , no. 21 , 213901 .
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 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.
Version: Publisher PDF
Status: Peer reviewed
URI: http://hdl.handle.net/10023/2808
DOI: http://dx.doi.org/10.1103/PhysRevLett.108.213901
ISSN: 0031-9007
Type: Journal article
Rights: © 2012 American Physical Society
Appears in Collections:University of St Andrews Research
Physics & Astronomy Research



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