Optical resonance of metal-coated nanoshell

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: metal-coated nanoshell optical resonance resonant wavelength skin effect
• 年，卷（期）: 2003,（1）
• 页码范围: 100-106
• 页数: 7页
• 分类号: O4
• 语种: 英文

摘要

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.