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Broadband three-photon absorption spectra of platinum acetylide complexes

机译:乙炔铂配合物的宽带三光子吸收光谱

摘要

We investigate the three-photon absorption spectra of four platinum acetylides complexes employing femtosecond pulses. We observed strong three-photon absorption cross-section in the near-infrared region (from 850 nm to 1200 nm). The three-photon absorption (3PA) spectra present resonance enhancement effect as two photons of the excitation wavelength approach the lower two-photon allowed states of the molecules as well as a 3PA allowed band around 1180 nm. The 3PA cross-section spectra were interpreted using the sum-over-essential-states approach, considering a three-energy-level diagram.
机译:我们调查使用飞秒脉冲的四个铂乙炔化物配合物的三光子吸收光谱。我们在近红外区域(从850 nm到1200 nm)观察到了很强的三光子吸收截面。当激发波长的两个光子接近分子的较低的两个光子允许态以及1180 nm附近的3PA允许带时,三光子吸收(3PA)光谱呈现出共振增强效果。考虑到三能级图,使用总和-基本态方法解释了3PA横截面光谱。

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