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- W1969156983 abstract "We use pump-probe spectroscopy and continuous wave cross-phase and cross-amplitude modulation measurements to study the optical nonlinearity of a hydrogenated amorphous silicon (a-Si:H) nanowire waveguide, and we compare the results to those of a crystalline silicon waveguide of similar dimensions. The a-Si:H nanowire shows essentially zero instantaneous two-photon absorption, but it displays a strong, long-lived non-instantaneous nonlinearity that is both absorptive and refractive. Power scaling measurements show that this non-instantaneous nonlinearity in a-Si:H scales as a third-order nonlinearity, and the refractive component possesses the opposite sign to that expected for free-carrier dispersion." @default.
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- W1969156983 date "2014-09-11" @default.
- W1969156983 modified "2023-09-30" @default.
- W1969156983 title "Non-instantaneous optical nonlinearity of an a-Si:H nanowire waveguide" @default.
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- W1969156983 doi "https://doi.org/10.1364/oe.22.022730" @default.
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