@article {Mendonca:589, title = {Two-photon absorption spectrum of Lucirin TPO-L}, journal = {Appl. Phys. A}, volume = {90}, year = {2008}, pages = {633{\textendash}636}, abstract = {Two-photon absorption induced polymerization provides a powerful method for the fabrication of intricate three-dimensional microstructures. Recently, Lucirin TPO-L was shown to be a photoinitiator with several advantageous properties for two-photon induced polymerization. Here we measure the two-photon absorption cross-section spectrum of Lucirin TPO-L, which presents a maximum of 1.2 GM at 610 nm. Moreover, from the two-photon absorption spectrum we determined that Lucirin TPO-L radical quantum yield is independent of the wavelength. Despite its small two-photon absorption cross- section, it is possible to fabricated excellent microstructures by two-photon polymerization microfabrication due to the high polymerization quantum yield (0.99) of Lucirin TPO-L. These results show that optimization of the two-photon absorption cross-section is not the only factor to be considered when searching for new photoinitiators for microfabrication via two-photon absorption.}, doi = {10.1007/s00339-007-4367-0}, url = {/files/mazur/files/rep_589.pdf}, author = {C. R. Mendonca and D. S. Correa and T. Baldacchini and P. Tayalia and Mazur, E.} }