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Absorption and propagation of light in quaterthiophene crystals |
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| Authors: | S Tavazzi A Borghesi M Campione A Papagni A Sassella P Spearman |
| Institution: | aMateriai, INFM and Dipartimento di Scienza dei Materiali, Università di Milano Bicocca, Via Cozzi 53, I-20125 Milano, Italy bSchool of Chemical and Pharmaceutical Sciences, Kingston University, Kingston upon Thames KT1 2EE, UK |
| Abstract: | We examine absorption of light in quaterthiophene crystals for different directions of the ray and wave-normal vector after refraction on the vacuum/crystal interface. Experimental non-normal incidence spectra are reported where different absorption bands show different behaviour as a function of the angle of incidence. This allows to identify those originating from the bu Frenkel exciton state. |
| Keywords: | Oligothiophenes Optical properties Directional dispersion |
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