Tunable local surface plasmon resonance in liquid-crystal-coated Ag nanoparticles |
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| Authors: | Yanling Liu Feng Song Jun Zhang Zhaozheng Lv Jiadong Liu Yin Yu Hongyan Zhao Huitian Wang |
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| Affiliation: | 1. The Ministry of Education Key Laboratory of Weak Light Nonlinear Photonics and Teda Applied Physics School, Nankai University, Tianjin 300457, China;2. School of Physics, Nankai University, Tianjin 300071, China |
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| Abstract: | The far-field and near-field properties of a spherical nematic liquid crystal (NLC) coated metal nanoparticle (NPs) have been investigated in an external field, basing on the quasistatic theory. The resonant wavelength is tunable by varying metallic material of core, anisotropy extent and thickness of liquid crystals (LCs). The field enhancement is along the incident polarization near the outer surface of the shell. The direction of field is reverse in the inner surface comparing with the one if outer shell. In contrast to isotropy shell, the surface plasmon resonance (SPR) shows an obvious red shift and field enhancement near outer surface of the shell always is stronger. |
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| Keywords: | Surface plasmon Liquid crystals Nanomaterials |
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