Polarization Dependent Nonlinear Absorption in Au Nanowire Array

Ruo Chen Xing; Si Xiao; Jun He

doi:10.4028/www.scientific.net/AMR.941-944.483

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 941-944Polarization Dependent Nonlinear Absorption in Au...

Polarization Dependent Nonlinear Absorption in Au Nanowire Array

Abstract:

The polarization dependent nonlinear absorption was observed in ordered Au nanowire array. The linear and nonlinear polarized absorption at 780 nm is investigated by Z-scan. When the angle between the polarization direction of input laser and the long axis of Au nanowires is 90°(perpendicular), the linear absorption reaches the maximum and the nonlinear absorption reaches the minimum. The nonlinear absorption coefficient β decreases from positive to negative as the angle increase from 0° to 90°. There may be two nonlinear absorption mechanisms resulting in this phenomenon: two-photon absorption and saturable absorption in nanoscale.

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Periodical:

Advanced Materials Research (Volumes 941-944)

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483-486

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.941-944.483

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Online since:

June 2014

Authors:

Ruo Chen Xing, Si Xiao*, Jun He

Keywords:

Au Nanowire Array, Nonlinear Absorption, Polarization Dependent

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