Abstract
The optical response of rubrene crystals is described by providing the full UV-VIS dielectric tensor. Consistently with the molecular and crystal symmetries, the lowest crystal transition originates from an molecular transition, it is polarized along the axis (normal to the larger crystal face), and it is the origin of the emission, which is self-guided towards the edge where the corresponding polarization and intensity angular distribution are detected. By contrast, the molecular transitions give rise to Davydov states described by the other two components of the diagonal dielectric tensor.
- Received 26 April 2007
DOI:https://doi.org/10.1103/PhysRevB.75.245416
©2007 American Physical Society