Abstract
Two novel anthracene derivatives containing 4-vinylpyridine (FPEA) and
2-vinylpyridine (TPEA) poly(methyl methacrylate) films are prepared on quartz glass
substrates. Their nonlinear absorption properties are investigated by using a
120-fs, 800-nm Ti:sapphire femtosecond pulsed laser operating at a 1-kHz repetition
rate. The unique nonlinear absorption properties of these new compounds are observed
by utilizing a Z-scan system. These two-photon absorption (TPA) properties are
proven by the two-photon fluorescence excited at 800 nm. The FPEA and TPEA films
have nonlinear TPA coefficients of 0.164 and 0.148 cm/GW and the TPA cross sections
of 3.345 × 10<sup>-48</sup> and 3.081 × 10<sup>-48</sup>
cm<sup>4</sup>·s/photon, respectively. The influence of the chemical structures
on the nonlinear TPA properties of the compounds is also discussed. The highly
nonlinear TPA activities of the films implied that the new anthracene derivatives
are suitable materials with promising applications in super-high-density
three-dimensional data storage and nano- or microstructure fabrication.
© 2012 Chinese Optics Letters
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