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Electronic Coherence and Collective Optical Excitations of Conjugated Molecules
| Content Provider | Scilit |
|---|---|
| Author | Mukamel, Shaul Tretiak, Sergei Wagersreiter, Thomas Chernyak, Vladimir |
| Copyright Year | 1997 |
| Description | 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 1.5- to 8-electronvolt frequency range suggests a saturation to bulk behavior at about five repeat units. |
| Related Links | http://mukamel.ps.uci.edu/publications/pdfs/325.pdf http://science.sciencemag.org/content/277/5327/781.full.pdf |
| Ending Page | 787 |
| Page Count | 7 |
| Starting Page | 781 |
| ISSN | 00368075 |
| e-ISSN | 10959203 |
| DOI | 10.1126/science.277.5327.781 |
| Journal | Science |
| Issue Number | 5327 |
| Volume Number | 277 |
| Language | English |
| Publisher | American Association for the Advancement of Science (AAAS) |
| Publisher Date | 1997-08-08 |
| Access Restriction | Open |
| Subject Keyword | Atomic, Molecular and Chemical Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | History and Philosophy of Science |
