Surface plasmon enhanced third-order optical nonlinearity of silver nanocubes

We present the linear and nonlinear optical properties of Ag nanocubes. The surface plasmon resonance absorption peak shows a red shift with increasing cube size. The nonlinear absorption and nonlinear refraction were measured by using Z-scan technique. The Ag nanocubes with the edge size of 60 nm s...

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Bibliographic Details
Published in:Optical materials express 2015-11, Vol.5 (11), p.2648-2654
Main Authors: Zhang, Kun, Huang, Zhu-Lin, Dai, Hong-Wei, Ma, Zong-Wei, Han, Jun-Bo, Gong, Hong-Mei, Han, Yi-Bo
Format: Article
Language:English
Subjects:
Demand
Devices
Doppler effect
Nanostructure
Nonlinearity
Plasmons
Silver
Surface chemistry
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Summary:We present the linear and nonlinear optical properties of Ag nanocubes. The surface plasmon resonance absorption peak shows a red shift with increasing cube size. The nonlinear absorption and nonlinear refraction were measured by using Z-scan technique. The Ag nanocubes with the edge size of 60 nm show the largest third-order optical nonlinearity, which is supported by the largest field enhancement factor through the FDTD simulations. In the wavelength range from 720 nm to 920 nm, the one-photon and two-photon figures of merit, W and T satisfy the demand of W > 1 and T < 1, which implies it is a promising candidate for the optical switching devices.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.5.002648