Abstract
Understanding the timing and location of nanoparticle (NP) generation during pulsed laser ablation in liquid is important for their fabrication. We report on high-speed videographic observations of UV-induced photoluminescence from YVO4:Eu3+ NPs following laser ablation in water. YVO4:Eu3+ is a red-emitting phosphor under UV excitation. A white mist-like region of low brightness, thought to be emissions from these NPs, appeared at the target surface’s center after laser irradiation. The NPs appeared to be diffuse within the first generated bubble during the expansion phase and gathered in its center during the shrinkage phase, remaining within the bubble until its collapse.
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