Optical activity in twisted solid-core photonic crystal fibers

X. M. Xi, T. Weiss, G. K. L. Wong, F. Biancalana, S. M. Barnett, M. J. Padgett, P. St. J. Russell

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

In this Letter we show that, in spectral regions where there are no orbital cladding resonances to cause transmission loss, the core mode of a continuously twisted photonic crystal fiber (PCF) exhibits optical activity, and that the magnitude of the associated circular birefringence increases linearly with twist rate and is highly reproducible. In contrast to previous work on twist-induced circular birefringence, PCF has zero linear birefringence and an on-axis core, making the appearance of circular birefringence rather unexpected. A theoretical model based on symmetry properties and perturbation theory is developed and used to show that both spin and orbital angular momentum play a role in this effect. It turns out that the degenerate left-and right-circularly polarized modes of the untwisted PCF are not 100% circularly polarized but carry a small amount of orbital angular momentum caused by the interaction between the core mode and the hollow channels.

LanguageEnglish
Article number143903
Number of pages4
JournalPhysical Review Letters
Volume110
Issue number14
DOIs
Publication statusPublished - 4 Apr 2013

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optical activity
birefringence
photonics
fibers
orbitals
crystals
angular momentum
transmission loss
hollow
perturbation theory
causes
symmetry
interactions

Keywords

  • photonic crystal fiber
  • orbital angular momentum

Cite this

Xi, X. M., Weiss, T., Wong, G. K. L., Biancalana, F., Barnett, S. M., Padgett, M. J., & Russell, P. S. J. (2013). Optical activity in twisted solid-core photonic crystal fibers. Physical Review Letters, 110(14), [143903]. https://doi.org/10.1103/PhysRevLett.110.143903
Xi, X. M. ; Weiss, T. ; Wong, G. K. L. ; Biancalana, F. ; Barnett, S. M. ; Padgett, M. J. ; Russell, P. St. J. / Optical activity in twisted solid-core photonic crystal fibers. In: Physical Review Letters. 2013 ; Vol. 110, No. 14.
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Xi, XM, Weiss, T, Wong, GKL, Biancalana, F, Barnett, SM, Padgett, MJ & Russell, PSJ 2013, 'Optical activity in twisted solid-core photonic crystal fibers' Physical Review Letters, vol. 110, no. 14, 143903. https://doi.org/10.1103/PhysRevLett.110.143903

Optical activity in twisted solid-core photonic crystal fibers. / Xi, X. M.; Weiss, T.; Wong, G. K. L.; Biancalana, F.; Barnett, S. M.; Padgett, M. J.; Russell, P. St. J.

In: Physical Review Letters, Vol. 110, No. 14, 143903, 04.04.2013.

Research output: Contribution to journalArticle

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AU - Xi, X. M.

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AU - Wong, G. K. L.

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AU - Barnett, S. M.

AU - Padgett, M. J.

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Xi XM, Weiss T, Wong GKL, Biancalana F, Barnett SM, Padgett MJ et al. Optical activity in twisted solid-core photonic crystal fibers. Physical Review Letters. 2013 Apr 4;110(14). 143903. https://doi.org/10.1103/PhysRevLett.110.143903