All-optical switching at the Fano resonances in subwavelength gratings with very narrow slits
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...
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Published in | Optics letters Vol. 36; no. 11; p. 1984 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.06.2011
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Online Access | Get more information |
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Summary: | 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. |
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ISSN: | 1539-4794 |
DOI: | 10.1364/OL.36.001984 |