Journal
OPTICS COMMUNICATIONS
Volume 285, Issue 7, Pages 1945-1948Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2011.11.118
Keywords
All-optical switching; Subwavelength gratings; Fano resonances; Chalcogenide glasses
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Funding
- DARPA SBIR
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We introduce the concept of mode-matched Fano resonances in one-dimensional, subwavelength, diffraction gratings. These resonances are characterized by an extremely high quality (Q)-factor and lend themselves well for applications to ultra-low power, all-optical switching devices at telecommunication wavelengths. We provide examples of diffraction gratings made of a chalcogenide glass (As2S3) where, thanks to the mode-matched Fano resonances, all-optical switching is obtained at local field intensities well below the photo-darkening threshold of the material. (C) 2011 Elsevier B.V. All rights reserved.
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