Polarized superradiant emission and exciton delocalization in tetracene single crystals are reported. Polarization-, time-, and temperature-resolved spectroscopies evidence the complete polarization of the zero-phonon line of the intrinsic tetracene emission from both the lower (F state) and the upper (thermally activated) Davydov excitons. The superradiance of the F emission is substantiated by a nearly linear decrease in the radiative lifetime with temperature, being 15 times shorter at 30 K compared to the isolated molecule, with an exciton delocalization of about 40 molecules. © 2010 The American Physical Society.
Camposeo, A., Polo, M., Tavazzi, S., Silvestri, L., Spearman, P., Cingolani, R., et al. (2010). Polarized superradiance from delocalized exciton transitions in tetracene single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 81(3) [10.1103/PhysRevB.81.033306].
Polarized superradiance from delocalized exciton transitions in tetracene single crystals
TAVAZZI, SILVIA;
2010
Abstract
Polarized superradiant emission and exciton delocalization in tetracene single crystals are reported. Polarization-, time-, and temperature-resolved spectroscopies evidence the complete polarization of the zero-phonon line of the intrinsic tetracene emission from both the lower (F state) and the upper (thermally activated) Davydov excitons. The superradiance of the F emission is substantiated by a nearly linear decrease in the radiative lifetime with temperature, being 15 times shorter at 30 K compared to the isolated molecule, with an exciton delocalization of about 40 molecules. © 2010 The American Physical Society.
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