高功率Ar $^+$ laser束与掺银$^+$玻璃相互作用的研究
Study of interaction of high-power Ar$^+$ laser beam with Ag$^+$-doped glass
摘要：
在这项工作中，我们研究了高功率Ar $^+$激光束，在一个连续的多线制度，与银$^+$掺杂玻璃样品的相互作用。在离子交换步骤之后，使样品经受辐照。作为照射的结果，在吸收光谱中出现峰值;其演变取决于曝光时间和激光束功率。光束与团簇的相互作用使它们破碎成较小的团簇，这已经被光学吸收光谱所证实。随着激光功率的增加，得到了不同的结果。结果发现，除了纳米团簇的碎裂，在样品中形成微米尺寸的团簇（$d\sim 3μm$），如果激光功率在快速制度增加。在密度泛函理论的框架下，用稳定的jeltron模型解释了碎裂过程。
英文摘要：
In this work, we have investigated the interaction of a high-power Ar$^+$ laser beam, in a continuous multi-line regime, with Ag$^+$-doped glass samples. The samples were subjected to the irradiation after the ion-exchange step. As a result of the irradiation, a peak appears in the absorption spectrum; its evolution depends on both the exposure time and the laser beam power. Interaction of the beam with the clusters causes them break into smaller ones which has been confirmed by optical absorption spectroscopy. Depending on the increment steps of the laser-beam power, different results are obtained. It is found that, in addition to the fragmentations of the nano-clusters, clusters of micro-meter size ($d\sim 3μm$) are formed in the sample, if the laser power is increased in a fast regime. The fragmentation processes have been explained in the framework of the density-functional theory with stabilized jellium model.
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