Au-Au_2S复合纳米球壳微粒的空腔谐振及参量讨论

Au-Au_2S Nanoshell Cavity Resonance and Parameters Discussion

Au Au2 S复合纳米球壳微粒 (金纳米球壳 ) ,是一种新型复合结构的纳米微粒 ,其结构为纳米级的Au2 S介质球外包裹了一层几个纳米厚的黄金球壳。这种复合纳米球壳微粒可以被抽象为球型谐振腔。报道了它的空腔谐振吸收的实验结果 ,并且运用经典理论结合介观结构特性 ,讨论了有关Au Au2 S复合纳米球壳微粒空腔谐振吸收的一些重要参量 ,其中包括谐振吸收波长、品质因数、谐振能量等。另外 ,还讨论了金球壳的厚度对这些重要参量的影响。

Au Au 2S nanoshell consists of a nanometer scale Au 2S dielectric core coated with a thin Au shell. The new electromagnetic resonant cavity properties of the gold nanoshell are discussed. The gold nanoshell is regarded as a nanometer electromagnetic resonant cavity, and the cavity resonance displays tunability controlled by the radii of the dielectric core. The main mode of nanocavity resonant absorption is obtained, it shows red shift during the reaction of the gold nanoshells. The parameters of gold nanoshell cavity resonance such as resonant wavelength, energy and linewidth are discussed.