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Title of Journal: Appl Phys B

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Abbravation: Applied Physics B

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Springer-Verlag

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DOI

10.1007/bf02803173

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1432-0649

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Nonlinear refraction of silver nanowires from nano

Authors: Y P Han J L Sun H A Ye W Z Wu G Shi
Publish Date: 2008/12/24
Volume: 94, Issue: 2, Pages: 233-237
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Abstract

In order to investigate the effect of pulse width and solvent on the nonlinear properties of metal nanostructures silver nanowires were fabricated in a direct current electric field DCEF using a solidstate ionic method and characterized by transmission electron microscopy TEM and Xray diffraction XRD The nonlinear refractive index γ of silver nanowires suspended in ethanol was measured using the Zscan technique and laser radiation of various femto pico and nanosecond pulse durations Experimental results indicated that silver nanowires have obvious positive refractive nonlinearities and γ the Kerrinduced selffocusing increases as the pulse duration increases from 74×10−8 cm2/GW at 110 fs to 16×10−4 cm2/GW at 8 ns due to the additional influence of the atomic reorientational Kerr effect in the case of longer pulses Due to the solvent dependence of the nonlinear behavior of the silver nanowires the nonlinear absorption and refraction of silver nanowires suspended in deionized water are smaller than those of silver samples suspended in ethanol The thermal nonlinearities are insignificant in our experimental conditions

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