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Electronic Coherence and Collective Optical Excitations of Conjugated Molecules
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mukamel, Shaul Tretiak, Sergei Wagersreiter, Thomas Chernyak, Vladimir |
| Copyright Year | 1997 |
| Abstract | Optical spectroscopy of conjugated molecules is described by using collective electronic coordinates, which represent the joint dynamics of electron-hole pairs. The approach relates the optical signals directly to the dynamics of charges and bond orders (electronic coherences) induced by the radiation field and uses only ground-state information, thus avoiding the explicit calculation of excited molecular states. The resulting real-space picture is reminiscent of the normal-mode analysis of molecular vibrations and offers a unified framework for the treatment of other types of systems including semiconductor nanostructures and biological complexes. Spatial coherence displayed in two-dimensional plots of the five electronic normal modes that dominate the optical response of poly( p-phenylene vinylene) oligomers with up to 50 repeat units (398 carbon atoms) in the 1.5to 8-electronvolt frequency range suggests a saturation to bulk behavior at about five repeat units. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://mukamel.ps.uci.edu/publications/pdfs/325.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
