Author/Authors :
S. Tavazzi، نويسنده , , A. Borghesi، نويسنده , , M. Campione، نويسنده , , A. Papagni، نويسنده , , A. Sassella، نويسنده , , P. Spearman، نويسنده ,
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.
