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Optics Letters

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  • Vol. 36, Iss. 11 — Jun. 1, 2011
  • pp: 1984–1986

All-optical switching at the Fano resonances in subwavelength gratings with very narrow slits

G. D’Aguanno, D. de Ceglia, N. Mattiucci, and M. J. Bloemer  »View Author Affiliations


Optics Letters, Vol. 36, Issue 11, pp. 1984-1986 (2011)
http://dx.doi.org/10.1364/OL.36.001984


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Abstract

We theoretically discuss all-optical switching at the Fano resonances of subwavelength gratings made of a chalcogenide glass ( As 2 S 3 ). Particular attention is devoted to the case in which the grating possesses extremely narrow slits (channels ranging from a 10 nm to a 40 nm ). The remarkable local field enhancement available in these situations conspires to yield low-threshold switching intensities ( ~ 50 MW / cm 2 ) at telecommunication wavelengths for extremely thin ( d 200 nm ) gratings when a realistic value of the As 2 S 3 cubic nonlinearity is used.

© 2011 Optical Society of America

OCIS Codes
(190.1450) Nonlinear optics : Bistability
(190.3270) Nonlinear optics : Kerr effect
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: March 18, 2011
Revised Manuscript: April 19, 2011
Manuscript Accepted: April 20, 2011
Published: May 23, 2011

Citation
G. D’Aguanno, D. de Ceglia, N. Mattiucci, and M. J. Bloemer, "All-optical switching at the Fano resonances in subwavelength gratings with very narrow slits," Opt. Lett. 36, 1984-1986 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-11-1984


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References

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