金奈米殼核粒子結合增益介質之電漿子超共振

本文研究受激輻射表面電漿子放大器，如金奈米殼球和金核殼球等結構，通過增益介質如染料分子或量子點摻入二氧化矽所在之核或殼層。我們通過使用Mie理論求解在平面波照射下的響應來研究奈米殼結構的超共振，此外又使用並矢Green’s函數研究由電偶極子激發奈米殼結構的響應。增益介質其與波長相關的相對介電係數則由Lorentz模型建立。由奈米殼結構的平面波響應，如散射和吸收截面積，可以確立其超共振現象，也代表此受激輻射表面電漿子放大器可以應用於奈米雷射。

關鍵字

受激輻射表面電漿子放大器；增益介質； Mie理論；並矢Green’s函數； Lorentz模型；超共振；奈米雷射

並列摘要

In the paper, a spaser (surface plasmon amplification by stimulated emission of radiation) has been proposed. For example, Au nanoshells containing gain medium (e.g. dyes or quantum dots) embedded in the silica core or coreshells coated by a gain medium. We study the super-resonance of nanoshell by using the Mie theory for their responses under the irradiation of plane wave. Moreover, the responses of these nanostructures excited by an electric dipole will be studied using the dyadic Green’s functions. The wavelength-dependent permittivity of the gain medium is modelled by Lorentz model. From the plane-wave responses (scattering and absorption cross sections) of the nanostructure, we can determine the super-resonance behavior. It implies that this spaser can be used for the application of nanolaser.

並列關鍵字

spaser ； gain media ； Mie theory ； dyadic Green’s functions ； Lorentz model ； super-resonance ； nanolaser

參考文獻

[36] 陳皇志，“單顆和雙顆多層奈米粒子之表面電漿子模態分析與對螢光分子的螢光增益之研究”，國立臺灣大學應用力學研究所碩士論文, 2013。

[35] 江崇煜，“金屬奈米殼之電漿子模態分析”，國立臺灣大學應用力學研究所碩士論文, 2011。

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國際替代計量

金奈米殼核粒子結合增益介質之電漿子超共振

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