Joint Quantum Institute and Quantum Measurement Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8423, USA.
Nano Lett. 2012 Jan 11;12(1):429-34. doi: 10.1021/nl2037613. Epub 2011 Dec 22.
We examine the size quantization of plasmons in metallic nanoparticles using time-dependent density functional theory. For small particles in the quantum limit, we identify "quantum core plasmons" and "classical surface plasmons", both of which are collective oscillations comprised of multiple single-particle transitions. As particle size increases, the response of the classical surface plasmons becomes much larger than that of the quantum core plasmons.
我们使用含时密度泛函理论研究了金属纳米粒子中等离子体的尺寸量子化。对于处于量子极限的小粒子，我们确定了“量子核心等离子体”和“经典表面等离子体”，它们都是由多个单粒子跃迁组成的集体振荡。随着粒子尺寸的增加，经典表面等离子体的响应比量子核心等离子体的响应大得多。
