About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Chemical Physics Letters
Paper
Raman scattering in electronically excited C60
Abstract
The low-temperature Raman spectrum of 2a0-fcc single crystal C60 recorded using low-irradiance 514 nm excitation shows only a single peak in the region of the 1468 cm-1 out-of-phase ring mode. For higher irradiances a new broad peak appears in the spectrum at a somewhat lower frequency. Simultaneously, an increase of the luminescence is observed. As the irradiance increases the new peak gains intensity and shifts to lower frequencies, whereas the orginal peak slowly disappears. It is argued that this peak originates from electronically excited C60. A simple electronic four-level model is proposed to explain the observed effects. © 1993.