Periasamy, N. ; Danieli, R. ; Ruani, G. ; Zamboni, R. ; Taliani, C. (1992) Location of the low-energy 1Ag state in a polythiophene oligomer by two-photon absorption spectroscopy: α-sexithienyl Physical Review Letters, 68 (7). 919-922 . ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v68/i7/p919_1
Related URL: http://dx.doi.org/10.1103/PhysRevLett.68.919
Abstract
The two-photon excitation spectrum in polycrystalline α-sexithienyl (T6) thin films has been investigated at 4.2 K in the spectral range between 910 and 1180 nm of the fundamental laser radiation. The intense two-photon absorption band at 18 350 cm-1 is assigned to the 2 1Ag exciton band origin. The comparison of the one-photon and two-photon excitation spectra shows that the lowest "gerade" exciton level lies at 898 cm-1 above the lowest one-photon-allowed 1 2Bu exciton level.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 37322 |
| Deposited On: | 22 Apr 2011 12:17 |
| Last Modified: | 22 Apr 2011 12:17 |
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