Laser-induced white emission (LIWE) is a phenomenon in which a broadband emission is generated through focused laser excitation and described in several different materials; however, the vast majority was explored only in vacuum or air. Herein, LIWE for NdAlO₃ nanocrystals immersed in different alcohols is described. It was observed as an evolution of bubbles in the focused point of excitation, which was responsible for the intermittence of the white emission due to changes in the excitation beam going through the bubbles. LIWE, although intermittent, presents a similar behavior regarding the nonlinear dependence of the excitation power in every alcohol used; however, a clear increase in the threshold of the LIWE phenomenon was observed, which was closely related to the relative permittivity of the alcohol in which the sample was immersed. This may open up the possibility to explore LIWE in solvents by properly choosing the material, relative permittivity of the solvent, and appropriate excitation power.

中文翻译：

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NdAlO3 纳米晶体在醇中的激光诱导宽带白光发射

激光诱导白光发射 (LIWE) 是一种宽带发射通过聚焦激光激发产生并在几种不同材料中描述的现象；然而，绝大多数只是在真空或空气中进行了探索。此处，LIWE 为 NdAlO ₃描述了浸入不同醇中的纳米晶体。它被观察为激发聚焦点中气泡的演变，这是由于激发光束穿过气泡的变化导致白色发射的间歇性的原因。LIWE，虽然是间歇性的，但在使用的每种酒精中都表现出关于激发功率的非线性依赖性的类似行为；然而，观察到 LIWE 现象的阈值明显增加，这与浸入样品的酒精的相对介电常数密切相关。通过适当选择材料、溶剂的相对介电常数和适当的激发功率，这可能会开启在溶剂中探索 LIWE 的可能性。