| Autor: |
M. Zagórska, A. Proń, J. Messier, Fabrice Charra, C. Sentein |
| Rok vydání: |
1991 |
| Předmět: |
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| Zdroj: |
Organic Molecules for Nonlinear Optics and Photonics ISBN: 9789401054904 |
| DOI: |
10.1007/978-94-011-3370-8_19 |
| Popis: |
We compare the optical properties of polyalkyl-thiophenes and -bithiophene having different conformations. We measure in thin layer the modulus and phase of the second order coefficient 2(3ω;ω,ω,ω) from 0.6 eV to 1.5 eV. We show that Third Harmonic Generation measurements together with optical absorption allow the determination of two-photon energy levels even in the case of inhomogeneous broadening. These are located 0.5–0.6 eV below the one-photon states. Experimental results compare well with quantum chemical calculations. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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