Polarized superradiance from delocalized exciton transitions in tetracene single crystals

2); 2) ((1) National Nanotechnology Laboratory of CNR-INFM; (2) Scuola Superiore ISUFI; (3) Dipartimento Scienza dei Materiali; Andrea Camposeo (1); Dario Pisignano (1; Italy; Italy); Lecce; Leonardo Silvestri (3)

arxiv: 1304.7958 · v1 · pith:4Q3H3BPMnew · submitted 2013-04-30 · ❄️ cond-mat.mtrl-sci

Polarized superradiance from delocalized exciton transitions in tetracene single crystals

Andrea Camposeo (1) , Marco Polo (1 , 2) , Silvia Tavazzi (3) , Leonardo Silvestri (3) , Peter Spearman (3) , Roberto Cingolani (1) , Dario Pisignano (1

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2) ((1) National Nanotechnology Laboratory of CNR-INFM Lecce Italy (2) Scuola Superiore ISUFI Universit\`a del Salento (3) Dipartimento Scienza dei Materiali Universit\`a di Milano Bicocca Milan Italy)

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classification ❄️ cond-mat.mtrl-sci

keywords emissionexcitontetracenecrystalsdelocalizationpolarizedsinglesuperradiance

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Polarized superradiant emission and exciton delocalization in tetracene single crystals are reported. Polarization-, time-, and temperature-resolved spectroscopy 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 of the radiative lifetime with temperature, being fifteen times shorter at 30 K compared to the isolated molecule, with an exciton delocalization of about 40 molecules.

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Polarized superradiance from delocalized exciton transitions in tetracene single crystals

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