.Polarizability and abnormal infrared spectra of molecules adsorbed on metal nanostructured surfaces[J].Optoelectronics Letters,2010,6(6):473-476 |
Polarizability and abnormal infrared spectra of molecules adsorbed on metal nanostructured surfaces |
黄晓菁 |
Department of Physics,School of Science,Jimei University; |
Abstract: |
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 anti-absorption 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. |
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