| Giant Field Localization in 2-D Photonic Crystal Cavities with Defect Resonances: Bringing Nonlinear Optics to the W/cm2 Level |
Jan 2012 |
8 pages |
| Authors:
Nadia Mattiucci; Mark J Bloemer; Giuseppe D'Aguanno; AEGIS TECHNOLOGIES GROUP INC HUNTSVILLE AL NANOGENESIS DIV
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 | We investigate the field localization properties in a 2-D photonic crystal cavity with defect resonances. Although based on a simple geometry, these resonances achieve extremely high quality (Q)-factors 108. We provide an example of a chalcogenide glass (As2S3) photonic crystal cavity where all-optical switching at telecommunication wavelengths can be obtained for input intensity W/cm2 and local field intensity in the crystal well below the photodarkening threshold of the material. |
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| Mode-matched Fano Resonances For All-optical Switching Applications (Preprint) |
Dec 2011 |
13 pages |
| Authors:
Nadia Mattiucci; Giuseppe D'Aguanno; Mark J Bloemer; AEGIS TECHNOLOGIES GROUP INC HUNTSVILLE AL NANOGENESIS DIV
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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 ... |
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| All-Optical Switching at the Fano Resonances in Subwavelength Gratings with Very Narrow Slits |
23 May 2011 |
4 pages |
| Authors:
G de D'Aguanno; D Ceglia; N Mattiucci; M J Bloemer; AEGIS TECHNOLOGIES GROUP INC HUNTSVILLE AL NANOGENESIS DIV
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| We theoretically discuss all-optical switching at the Fano resonances of subwavelength gratings made of a chalcogenide glass (As2S3). Particular attention is devoted to the case in which the grating possesses extremely narrow slits (channels ranging from alpha approximately 10nm to alpha approximately 40nm). The remarkable local field enhancement available in these situations conspires to yield low-threshold switching intensities (approximately 50MW=sq cm) at telecommunication wavelengths for extremely thin (d approximately 200nm) ... |
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| Quenched Optical Transmission in Ultrathin Subwavelength Plasmonic Gratings |
Jan 2011 |
12 pages |
| Authors:
G D'Aguanno; N Mattiucci; A Alu; M J Bloemer; AEGIS TECHNOLOGIES GROUP INC HUNTSVILLE AL NANOGENESIS DIV
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| We discuss the optical properties of one-dimensional ultrathin subwavelength, metallic gratings under transverse magnetic excitation, with particular attention to the phenomenon of quenched transmission, recently highlighted in several optical experiments. In particular, we consider a grating with thickness comparable to or less than the metal skin depth, showing how the geometrical properties of the grating can dramatically modify its transmission properties, often in a counterintuitive way. We study the role ... |
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