Laser‐controlled dissociation and ionization pathways in electronically excited AsH<sub>3</sub>
作者:B. Koplitz、Z. Xu、C. Wittig
DOI:10.1063/1.99254
日期:1988.3.14
the firing of photolysis and probe lasers, product H atoms are detected by two‐frequency, two‐photon ionization (121.6 nm+364.7 nm) via Lyman‐α. However, temporally overlapping the photolysis and ‘‘probe’’ beams enables ionization to complete with dissociation. The resulting AsH+x signal displays a marked dependence on the near‐UV frequency, and AsH+x peaks are accompanied by dips in the H‐atom signal
描述了涉及 193 nm AsH3 激发的实验。在光解和探针激光发射之间的延迟≥25 ns 时,通过 Lyman-α 的双频双光子电离 (121.6 nm+364.7 nm) 检测产物 H 原子。然而,光解和“探测”光束在时间上重叠使电离与解离完成。得到的 AsH+x 信号显示出对近紫外频率的显着依赖性,并且 AsH+x 峰伴随着 H 原子信号的下降。延迟和近紫外频率控制了不同途径之间的竞争,整体效应既容易诱发又是宏观的。可以在半导体材料的光辅助生长中找到应用。