1 国防科技大学前沿交叉学科学院，脉冲功率激光技术国家重点实验室，高能激光技术湖南省重点实验室，湖南 长沙 410073
2 中国科学院苏州纳米技术与纳米仿生研究所，创新实验室，纳米器件与应用重点实验室，纳米光子材料与器件重点实验室，江苏 苏州 215123
3 武汉科技大学耐火材料和冶金学国家重点实验室，湖北 武汉 430081
4 上海交通大学物理与天文学院，上海 200240
5 梧州学院电子与信息工程学院，广西 梧州 543001
碲烯具有宽带吸收、高迁移率和独特的拓扑性质，在红外光学应用领域被寄予厚望。本团队利用化学气相输运方法制备了高结晶性碲烯纳米片；结合精准的端面转移技术，获得了利于光纤集成的可饱和吸收体；基于碲烯的非线性饱和吸收特性，在1.55 μm波段实现了稳定的被动调Q脉冲输出，中心波长约为1558 nm，脉冲宽度约为1.44 μs，重复频率在87~133 kHz范围内可调。本研究结果拓展了新型碲烯纳米材料的应用场景，为可调谐脉冲激光提供了解决方案。
激光器 纳米材料 可饱和吸收体 被动调Q 可调谐脉冲激光 碲烯
Author Affiliations
Abstract
1 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
2 Key Laboratory of Functional Crystal Materials and Device (Shandong University), Ministry of Education, Jinan 250100, China
For the first time, a group-VI single element nanomaterial was used as the optical saturable absorber (SA) to generate laser pulses. With two-dimensional (2D) tellurene as a passive Q-switch, 1.06 μm and 1.3 μm pulse laser operations were realized from a diode-pumped Nd:YAG crystal. The shortest pulse widths were 98 ns and 178 ns, and the highest peak powers were 2.68 W and 2.45 W, respectively. Our research determines that tellurene is an excellent SA material in the near-infrared region.
tellurene nanosheets absorber graphene passive Q-switching Chinese Optics Letters
2020, 18(4): 041403
