Large third-order nonlinear refractive index coefficient based on gold nanoparticle aggregate films

作者: Songang Bai , Qiang Li , Han Zhang , Xingxing Chen , Si Luo

DOI: 10.1063/1.4931759

关键词:

摘要: Au nanoparticles show large third-order nonlinear effect and ultra-fast response. Here a high aggregate film based on self-assembled gold is reported its refractive index coefficient measured by Z-scan experiment. The of the nanoparticle (γ1 = 9.2 × 10−9 cm2/W) found to be larger than that an 8-nm-thick sputtered (γ2 = 6.5 × 10−9 cm2/W). This can attributed strong field enhancement due localized plasmon resonances between nanoparticles. result shows could promising candidate as optical material.

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