Long range plasmon assisted all-optical switching at telecommunication wavelengths

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Nadia Mattiucci, Giuseppe D’Aguanno, and Mark J. Bloemer, "Long range plasmon assisted all-optical switching at telecommunication wavelengths," Optics Letters Vol. 37, Issue 2, pp. 121-123 (2012) ,https://doi.org/10.1364/OL.37.000121

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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.

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Abstract

We exploit the properties of ultranarrow, Fano-like resonances generated by the coupling of long range surface plasmons with ultrathin (∼10 nm), metallic, subwavelength gratings embedded in a nonlinear, cubic material to obtain all-optical switching at telecommunication wavelengths for extremely low input power. We provide an example of a silver metallic grating embedded in a chalcogenide glass (As₂S₃), and we show the concrete possibility to achieve all-optical switching at local field intensities compatible with the photo-darkening threshold of the material.