Silicon photonics meets the electronics requirement of increased speed and bandwidth with on-chip optical networks. All-optical data management requires nonlinear silicon photonics. In silicon only third-order optical nonlinearities are present owing to its crystalline inversion symmetry. Introducing a second-order nonlinearity into silicon photonics by proper material engineering would be highly desirable. It would enable devices for wideband wavelength conversion operating at relatively low optical powers. Here we show that a sizeable second-order nonlinearity at optical wavelengths is induced in a silicon waveguide by using a stressing silicon nitride overlayer. We carried out second-harmonic-generation experiments and first-principle calculations, which both yield large values of strain-induced bulk second-order nonlinear susceptibility, up to 40 pm V-1 at 2,300 nm. We envisage that nonlinear strained silicon could provide a competing platform for a new class of integrated light sources spanning the near-to mid-infrared spectrum from 1.2 to 10μm. © 2012 Macmillan Publishers Limited.
Second-harmonic generation in silicon waveguides strained by silicon nitride / M., Cazzanelli; F., Bianco; E., Borga; G., Pucker; M., Ghulinyan; E., Degoli; E., Luppi; V., Véniard; S., Ossicini; Modotto, Daniele; Wabnitz, Stefan; R., Pierobon; L., Pavesi. - In: NATURE MATERIALS. - ISSN 1476-1122. - 11:(2012), pp. 148-154. [10.1038/NMAT3200]
Second-harmonic generation in silicon waveguides strained by silicon nitride
WABNITZ, Stefan;
2012
Abstract
Silicon photonics meets the electronics requirement of increased speed and bandwidth with on-chip optical networks. All-optical data management requires nonlinear silicon photonics. In silicon only third-order optical nonlinearities are present owing to its crystalline inversion symmetry. Introducing a second-order nonlinearity into silicon photonics by proper material engineering would be highly desirable. It would enable devices for wideband wavelength conversion operating at relatively low optical powers. Here we show that a sizeable second-order nonlinearity at optical wavelengths is induced in a silicon waveguide by using a stressing silicon nitride overlayer. We carried out second-harmonic-generation experiments and first-principle calculations, which both yield large values of strain-induced bulk second-order nonlinear susceptibility, up to 40 pm V-1 at 2,300 nm. We envisage that nonlinear strained silicon could provide a competing platform for a new class of integrated light sources spanning the near-to mid-infrared spectrum from 1.2 to 10μm. © 2012 Macmillan Publishers Limited.File | Dimensione | Formato | |
---|---|---|---|
Cazzanelli_Second-harmonic_post-print_2012.pdf
solo gestori archivio
Tipologia:
Documento in Post-print (versione successiva alla peer review e accettata per la pubblicazione)
Licenza:
Tutti i diritti riservati (All rights reserved)
Dimensione
1.46 MB
Formato
Adobe PDF
|
1.46 MB | Adobe PDF | Contatta l'autore |
Cazzanelli_Second-harmonic_2012.pdf
solo gestori archivio
Tipologia:
Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza:
Tutti i diritti riservati (All rights reserved)
Dimensione
545.24 kB
Formato
Adobe PDF
|
545.24 kB | Adobe PDF | Contatta l'autore |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.