Measurements of the third-order nonlinearity of a soluble polycarbazolyldiacetylene by picosecond Z-scan at 1064 and 1500 nm

Year: 2002

Authors: Giorgetti E., Toci G., Vannini M., Cavallo D., Dellepiane G.

Autors Affiliation: Ist. Di Ricerca Sulle Onde Elettromagnetiche Nello Carrara, Consiglio Naz. Della Ricerche (IROE-CNR), Via Panciatichi 64, 50127 Firenze, Italy; IEQ-CNR, Via Panciatichi 56/30, 50127 Firenze, Italy; INFM, INSTM, Università Di Genova, Via Dodecaneso 31, 16146 Genova, Italy

Abstract: The complex ?(3) of toluene solutions of polydiacetylene, polyDCHD-HS, was measured by using Z-scan at ? = 1064 and 1500 nm and with picosecond pulses in order to estimate the potentials of this polymer for application to all-optical switching devices. The values of the real part of molecular hyperpolarizability ? were -2.3 × 10-47 and -3 × 10-47m5/V2 at 1064 and 1500 nm, respectively. The nonlinear absorption could be better modeled with a three-photon process at both the wavelengths instead of the expected two-photon mechanism.

Journal/Review: SYNTHETIC METALS

Volume: 127 (1-3)      Pages from: 139  to: 142

KeyWords: Light polarization; Multiphoton processes; Nonlinear optics; Optical devices; Optical switches; Solutions; Toluene, Molecular hyperpolarizabilities, Organic polymers
DOI: 10.1016/S0379-6779(01)00611-7

Citations: 7
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