Deep-Ultraviolet鈥揃lue-Light Surface Plasmon Resonance of Al and Alcore/Al2O3shell in Spherical and Cylindrical Nanostructures

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• 作者：Jinlian Hu ; Lu Chen ; Zichao Lian ; Min Cao ; Haijin Li ; Wenbin Sun ; Niuliu Tong ; Haibo Zeng
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：July 26, 2012
• 年：2012
• 卷：116
• 期：29
• 页码：15584-15590
• 全文大小：483K
• 年卷期：v.116,no.29(July 26, 2012)
• ISSN：1932-7455

文摘

The surface plasmon resonance (SPR) properties in the deep-ultraviolet (UV) to blue-light region of Al and Al_core/Al₂O_3shell in spherical and cylindrical nanostructures have been investigated using the discrete dipole approximation method. Simulation results show that the extremely short resonance wavelength of the Al nanostructures means the SPR is highly sensitive to the particle size and results in significant phase retardation and multipole resonance. Cylindrical Al nanoparticles show multipole resonance peaks with extremely strong intensity and narrow widths that are blue-shifted and then red-shifted with an increase in the cylinder length. An expression of the SPR peak wavelength, 位_max, is derived and related to the peak shift. Cylindrical Al_core/Al₂O_3shell nanostructures are shown to modulate the SPR through changes to the aspect ratio and Al₂O₃ shell thickness. The results will assist greatly in modulating or optimizing SPR in the deep-UV to blue-light region for multimode optical filter, enhanced spectroscopy, optical lithography, and waveguide applications.