wo-photon absorption (TPA) spectra of push-pull chromophores are described in terms of a two-state model accounting for electron-vibration coupling. Vibrations have two main effects in TPA spectra. The most obvious one is the appearance of a vibrational structure in the spectrum; in this respect we find large Herzberg-Teller (HT) contributions. The second effect was not recognized so far: vibrational states contribute a new channel to TPA process, that shows up with a blue-shift and a distortion of the spectrum.
Vibronic contributions to resonant NLO responses: two-photon absorption in push-pull chromophores / Painelli, Anna; DEL FREO, Luca; Terenziani, Francesca. - In: CHEMICAL PHYSICS LETTERS. - ISSN 0009-2614. - 346:5-6(2001), pp. 470-478. [10.1016/S0009-2614(01)00994-0]
Vibronic contributions to resonant NLO responses: two-photon absorption in push-pull chromophores
PAINELLI, Anna;DEL FREO, Luca;TERENZIANI, Francesca
2001-01-01
Abstract
wo-photon absorption (TPA) spectra of push-pull chromophores are described in terms of a two-state model accounting for electron-vibration coupling. Vibrations have two main effects in TPA spectra. The most obvious one is the appearance of a vibrational structure in the spectrum; in this respect we find large Herzberg-Teller (HT) contributions. The second effect was not recognized so far: vibrational states contribute a new channel to TPA process, that shows up with a blue-shift and a distortion of the spectrum.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
