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Please use this identifier to cite or link to this item: http://hdl.handle.net/10023/2853
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Title: Four-wave mixing in photonic crystal waveguides : slow light enhancement and limitations
Authors: Li, Juntao
O'Faolain, Liam
Rey, Isabella Helen
Krauss, Thomas Fraser
Keywords: Nonlinear optics
Four-wave mixing
Photonic Crystal waveguides
Dispersion
QC Physics
Issue Date: 28-Feb-2011
Citation: Li , J , O'Faolain , L , Rey , I H & Krauss , T F 2011 , ' Four-wave mixing in photonic crystal waveguides : slow light enhancement and limitations ' Optics Express , vol 19 , no. 5 , pp. 4458-4463 .
Abstract: We demonstrate continuous wave four-wave mixing in silicon photonic crystal waveguides of 396 mu m length with a group index of n(g) = 30. The highest observed conversion efficiency is -24 dB for 90 mW coupled input pump power. The key question we address is whether the predicted fourth power dependence of the conversion efficiency on the slowdown factor (eta approximate to S-4) can indeed be observed in this system, and how the conversion efficiency depends on device length in the presence of propagation losses. We find that the expected dependencies hold as long as both realistic losses and the variation of mode shape with slowdown factor are taken into account. Having achieved a good agreement between a simple analytical model and the experiment, we also predict structures that can achieve the same conversion efficiency as already observed in nanowires for the same input power, yet for a device length that is 50 times shorter. (C) 2011 Optical Society of America
Version: Publisher PDF
Status: Peer reviewed
URI: http://hdl.handle.net/10023/2853
DOI: http://dx.doi.org/10.1364/OE.19.004458
ISSN: 1094-4087
Type: Journal article
Rights: (c) 2011 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at http://www.opticsinfobase.org
Appears in Collections:University of St Andrews Research
Physics & Astronomy Research



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