Author/Authors :
Drobizhev، نويسنده , , Mikhail and Karotki، نويسنده , , Aliaksandr and Kruk، نويسنده , , Mikalai and Rebane، نويسنده , , Aleksander، نويسنده ,
Abstract :
Two-photon absorption spectra in absolute cross-section values are presented for a number of octaethyl-, tetraphenyl-, and tetrabenzo-substituted porphyrins. In excitation spectral region of 710–810 nm, the two-photon absorption efficiency is resonantly enhanced due to nearby Q(0–0) one-photon transition. The cross-section value calculated directly from the ground- and excited-state absorption parameters in a single intermediate level approximation, agrees well with that measured in experiment.
