Affiliation:
1. Wuhan City Polytechnic
2. Huazhong University of Science and Technology
3. Wenhua College
Abstract
A sandwich plasmonic nanostructure (AuNRs-ITO-Au) composed of random-distributed gold
nanorods (AuNRs) film, an indium tin oxide (ITO) space layer, and gold
thin film was prepared by using sputtering methods. Third-order
optical nonlinearities were investigated by using the Z-scan technique
under ultralow excitation laser powers. Fifteen times of third-order
optical susceptibility (χ(3)) enhancement has been
obtained in AuNRs/ITO/Au compared to pure AuNRs at 880 nm. The
FDTD simulation demonstrates that this enhancement is due to the
further confinement of the electric field inside the sandwich
nanostructure. The results are significant and may find applications
in ultralow-power all-optical switches and plasmonic waveguides.
Funder
National Scientific Foundation of China
The Knowledge Innovation Program of Wuhan -Basic Research
Subject
Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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