Statistical fluctuations of transmission in slow light photonic-crystal waveguides

Optics Express
S MazoyerT F Krauss

Abstract

We report statistical fluctuations for the transmissions of a series of photonic-crystal waveguides (PhCWs) that are supposedly identical and that only differ because of statistical structural fabrication-induced imperfections. For practical PhCW lengths offering tolerable -3dB attenuation with moderate group indices (n(g) approximately 60), the transmission spectra contains very narrow peaks (Q approximately 20,000) that vary from one waveguide to another. The physical origin of the peaks is explained by calculating the actual electromagnetic-field pattern inside the waveguide. The peaks that are observed in an intermediate regime between the ballistic and localization transports are responsible for a smearing of the local density of states, for a rapid broadening of the probability density function of the transmission, and bring a severe constraint on the effective use of slow light for on-chip optical information processing. The experimental results are quantitatively supported by theoretical results obtained with a coupled-Bloch-mode approach that takes into account multiple scattering and localization effects.

References

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Citations

Jun 1, 2016·Scientific Reports·Samuel SernaEric Cassan
Dec 18, 2010·Optics Express·Michael L CooperShayan Mookherjea
Jan 5, 2011·Optics Express·L O'FaolainT F Krauss
Oct 6, 2018·Scientific Reports·Yiming LaiAntonio Badolato
Nov 17, 2011·Applied Optics·Simon MazoyerAndrea Melloni
Aug 4, 2012·Optics Letters·Momchil Minkov, Vincenzo Savona

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