Journal
OPTICAL MATERIALS EXPRESS
Volume 6, Issue 12, Pages 3838-3848Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.6.003838
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Funding
- Nanotechnology Platform Program (Molecule and Material Synthesis) of the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- JSPS KAKENHI [25420785, 26400316]
- Grants-in-Aid for Scientific Research [26400316, 25420785] Funding Source: KAKEN
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Heavily doped Cu2-xS nanoparticles with hole densities of similar to 10(21) cm(-3) were chemically synthesized and their localized surface plasmon resonance (LSPR) in the near-infrared region was investigated by nonlinear optical spectroscopy. We found that their thirdorder susceptibility chi((3)) exhibits resonant enhancement around LSPR, similar to that in plasmonic noble metal nanoparticles. It was found that the maximum chi((3)) value of Cu2-xS nanoparticles was comparable to that of Au nanoparticles with the same dimensions and concentrations. Our results indicate that Cu2-xS nanoparticles can be used as nonlinear optical materials operating in the near-infrared region, even though their near-field enhancement effect is slightly weaker than that of Au nanoparticles. (C) 2016 Optical Society of America
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