Three-photon absorption and subsequent excited state absorption of the generated electrons and holes have been observed.
观察到了三光子吸收及所伴随的自由载流子的激发态吸收，并测得了三光子吸收系数。
2
The paper reports the measurement of 78 high-lying levels in samarium atoms by two-colour three-photon resonant ionization.
本文报道用双色三光子共振电离法测量钐原子高激发态78个新能级。
3
Taking anthracene-porphyrin-anthracene triads as example, we found that the intra-molecular charge transfer process can largely enhance the three-photon absorption cross-section.