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Metal-coated nanoshell,the nanoparticle consisting of a nanometre-scale dielectric core coated with a thin metallic shell,exhibits three distinct optical resonant forms,the sphere cavity resonance(SCR),plasmon resonance(PR),and concentric dielectric sphere resonance(CDSR),The SCR,PR and CDSR of the metal-coated nanoshell reveal a geometric tunability controlled by the core radius and by the ratio of the core radius to the total radius,Classical electrodynamics and Mie scattering theory are used to treat the resonant forms and the transition state between the resonant forms.Based on previous experimental research,we present a group of resonant equations for all the resonant forms.which depend on the geometric structure of the metal-coated nanoshell. 相似文献
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金属包裹纳米微粒的光学特性研究(英文) 总被引:2,自引:0,他引:2
金属包裹纳米粒子是一种纳米量级的介质球核外包裹薄金属层的纳米粒子.在本文中,Au包裹Au2S纳米粒子被抽象成微型电磁谐振腔,其谐振波长决定于Au2S介质球核的半径.运用经典电磁理论可以得到谐振波长和谐振能量.由于Au包层很薄(2nm),这种微型谐振腔的耦合方式是有别于传统方式的透射耦合,因此Au包层的厚度决定了谐振的能量以及谐振腔品质因子Q.此外,本文还讨论了吸收峰的线宽. 相似文献
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A liquid-solid-gas interface deposition method to prepare nanoparticle thin films is presented in this paper. The nanoparticles in the part of suspension located close to the solid-liquid-gas interface grow on the substrate under the influence of interface force when the partially immersed substrate moves relatively to the suspension. By using statistical theory of the Brownian motion, growth equations for mono-component and multi-component nanoparticle thin films are obtained and some parameters for deposition process are discussed. 相似文献
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