Nonlinear optical properties and ultrafast photophysical investigations in organic dendrimers

Theodore G. Goodson III; Oleg P. Varnavski

doi:10.1117/12.368297

11 October 1999 Nonlinear optical properties and ultrafast photophysical investigations in organic dendrimers

Theodore G. Goodson III, Oleg P. Varnavski

Proceedings Volume 3796, Organic Nonlinear Optical Materials; (1999) https://doi.org/10.1117/12.368297
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The nonlinear optical properties are reported for a novel organic dendrimer using femtosecond pulses. The organic dendrimer showed strong nonlinear refraction when measured at 790 nm, a wavelength far from the linear resonance. The nonlinear refractive index was measured by the z-scan technique and the magnitude was measured to be 1.1*10^-4 cm²/GW. The presence of two photon absorption was observed and a related nonlinear absorption coefficient was found to be 1.2*10^-2 cm/GW. A strong two-photon luminescence was detected resulting from this nonlinear absorption, and the power dependence and spectral characteristics were measured. The presence of a higher order, (chi) ⁽⁵), nonlinear optical effect was also detected. The ultra-fast dynamics of the organic dendrimer using fluorescence upconversion spectroscopy are reported. At higher emission energies we observe femto-second decay, and at lower energies a rise time of the luminescence intensity was observed.

Citation Download Citation

Theodore G. Goodson III and Oleg P. Varnavski "Nonlinear optical properties and ultrafast photophysical investigations in organic dendrimers", Proc. SPIE 3796, Organic Nonlinear Optical Materials, (11 October 1999); https://doi.org/10.1117/12.368297

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