In this Letter, we prepare FeNi–layered-double-hydroxide (LDH) nanoflakes and illustrate the corresponding microcosmic morphology. The optical response and laser modulation performance of the nanoflakes in the mid-infrared region were investigated for the first time, to the best of our knowledge. Employed as a saturable absorber in an ${\rm Er}{:}{\rm Lu}_2{\rm O}_3$ laser system, pulses with 256-ns duration were yielded at a repetition of 129 kHz under 7.8-W pump power, which corresponds to a pulse energy of 4.98 µJ.

中文翻译：

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FeNi-LDH在中红外区域的光学非线性和激光调制性能

在这封信中，我们准备了FeNi层状双氢氧化物（LDH）纳米薄片，并举例说明了相应的微观形态。据我们所知，首次研究了中红外区域纳米薄片的光学响应和激光调制性能。在$ {\ rm Er} {：} {\ rm Lu} _2 {\ rm O} _3 $激光系统中用作可饱和吸收体，在7.8W下以129 kHz的重复频率产生了256ns持续时间的脉冲泵浦功率，对应于4.98 µJ的脉冲能量。