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Third-order susceptibility of gold for ultrathin layers

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Abstract

This Letter presents an experimental study of nonlinear plasmonic effects in gold-stripe waveguides. The optical characterization is performed by a picosecond laser and reveals two nonlinear effects related to propagation of long-range surface plasmon polaritons: nonlinear power transmission of plasmonic modes and spectral broadening of plasmonic modes. The experimental values of the third-order susceptibility of the gold layers are extracted. They exhibit a clear dependence on layer thickness.

© 2016 Optical Society of America

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Corrections

8 January 2016: A correction was made to the title of Table 1.


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