双光子发射

利用飞秒双光子光电子发射研究GaAs（100）的自旋动力学过程

Spin dynamics of GaAs ( 100 ) by two - photon photoemission

其双光子荧光发射峰位和峰形都与单光子荧光相近，都存在双光子吸收机制的上转换发射。

The one-photon-excited and the two-photon-excited fluorescence behaviors are very much similar , suggestion that both to be the emission coming from the same excitation state .

通过对所得的稳定纳晶的光学特性进行充分评价，不仅观察到单光子荧光的增强和荧光寿命的延长，而且还获得了双光子荧光发射、双光子吸收截面和作用截面的增强。

Besides , we evaluated the optical properties , such as one-photon fluorescence , two-photon fluorescence , two-photon absorption cross section and lifetime of size-controlled nanocrystals .

photon-1.这2个对称型D-π-A-π-D生色分子从激发端基到π共轭桥的有效能量传输，对双光子吸收和双光子荧光发射能力贡献较大。

Photon-1 . A very effective energy transfer from the excited terminal units to the π - conjugated bridging units of the two symmetrical D - π - A - π - D chromophores make the dominant contribution to the two-photon absorption and two-photon excited fluorescence .