Simultaneous ultrafast probing of intramolecular vibrations and photoinduced charge carriers in rubrene using broadband time-domain THz spectroscopy

using ultrafast broadband THzspectroscopy. In this frequency range, we observe the response of both photogenerated mobile charges andintramolecular vibrational modes simultaneously, both of which vary with time after excitation. The data inconjunction with a theoretical model indicate a dynamic blueshift of the 15.5 THz phonon.DOI: 10.1103/PhysRevB.75.195216 PACS number s : 72.80.Le, 63.20.Kr, 72.20. i, 71.38. k