Son Dong Hee, Wittenberg Joshua S, Alivisatos A Paul
Department of Chemistry, University of California, Berkeley California 94720, USA.
Phys Rev Lett. 2004 Mar 26;92(12):127406. doi: 10.1103/PhysRevLett.92.127406.
Multielectron ionization of colloidal CdSe quantum dots under intense femtosecond UV excitation has been studied. By directly probing the absorption from the ionized electron, quantitative measurements of the yield and dynamics of the ionization have been made as a function of excitation fluence and variations of size and potential structure of quantum dots. The results have been explained by an ionization mechanism involving resonant two-photon absorption.
研究了飞秒强紫外光激发下胶体CdSe量子点的多电子电离。通过直接探测电离电子的吸收，对电离产率和动力学随激发通量以及量子点尺寸和势结构变化进行了定量测量。结果用涉及共振双光子吸收的电离机制进行了解释。
