Gold Nanowires: A Time-Dependent Density Functional Assessment of Plasmonic Behavior

详细信息    查看全文

• 作者：GiovanniMaria Piccini ; Remco W. A. Havenith ; Ria Broer ; Mauro Stener
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：August 22, 2013
• 年：2013
• 卷：117
• 期：33
• 页码：17196-17204
• 全文大小：381K
• 年卷期：v.117,no.33(August 22, 2013)
• ISSN：1932-7455

文摘

The surface plasmon resonance has been theoretically investigated in gold nanowires by means of time-dependent density functional theory. Linear chains of Au atoms and nanowires with the structure of the fcc bulk gold grown along the 110 and 111 directions have been considered. The effects of changing the length and the section on the plasmon have been studied. Strong photoabsorption is found when the length is above 2 nm: in that case the absorption profile is characterized by a sharp peak, and its analysis reveals that many configurations contribute to the transition, confirming its collective nature as an s 鈫?s intraband transition. As expected, the effect of increasing the length is reflected in a red shift of the plasmon.