Polarizability and abnormal infrared spectra of molecules adsorbed on metal nanostructured surfaces

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2010,（6）
• 页码范围: 473-476
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-010-9182-8

摘要

Based on the experimental results of abnormal infrared effects(AIRES)for molecules adsorbed on transition-metal nanostructured surfaces,the interactions and the polarizability of the adsorbed molecules are analyzed theoretically.By numerical simulations,the normal absorption spectrum,the Fano-like bipolar spectrum and the antiabsorption spectrum of the adsorbed CO molecules are obtained respectively.The results show that the adsorbed molecules on a metal nanostructured surface can accumulate together dues to the effect of local external electric field,which leads to a change in imaginary part of the molecular polarizability within a certain range of frequency,and even a negative value may appear.