Enhancing or suppressing the upconversion luminescence (UCL) of rare-earth ions has very important application prospects in various areas such as color display and optoelectronic devices. However, the control efficiency is not always optimal because the pre-designed femtosecond laser field is usually not the most suitable. The femtosecond laser pulse-shaping technique has proved to be a very well-established tool to obtain the UCL enhancement and suppression. In this letter, we experimentally realize the maximum UCL enhancement and suppression of Dy 3+ -doped glass by optimizing the femtosecond laser spectral phase based on a genetic algorithm. Our experimental results show that the UCL intensity can be further enhanced and also completely suppressed. The physical control mechanism of the UCL enhancement and suppression is interpreted based on a resonant-mediated two-photon absorption model and the obtained optimal femtosecond laser spectral phase. This study provides a...

中文翻译：

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飞秒激光诱导的Dy 3+掺杂玻璃的上转换发光增强和抑制的优化

增强或抑制稀土离子的上转换发光（UCL）在彩色显示和光电设备等各个领域具有非常重要的应用前景。但是，由于预先设计的飞秒激光场通常不是最合适的，因此控制效率并不总是最佳的。飞秒激光脉冲整形技术已被证明是获得UCL增强和抑制的非常完善的工具。在这封信中，我们通过基于遗传算法优化飞秒激光光谱相位，以实验方式实现了最大的UCL增强和Dy 3+掺杂玻璃的抑制。我们的实验结果表明，UCL强度可以进一步增强，也可以被完全抑制。基于共振介导的双光子吸收模型和获得的最佳飞秒激光光谱相位，解释了UCL增强和抑制的物理控制机制。这项研究提供了...