Passively mode-locked Er-doped fiber laser based on a semi-metallic InBi saturable absorber
Passively mode-locked Er-doped fiber laser based on a semi-metallic InBi saturable absorber
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DOI：
10.1088/1361-6463/ac378e
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Jianwei Hu;H. Long;Zi-Qiao Wei;Rong Huang;Minru Wen;Fugen Wu;Huafeng Dong;Lili Tao
中科院分区：
文献类型：
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作者：
Jianwei Hu;H. Long;Zi-Qiao Wei;Rong Huang;Minru Wen;Fugen Wu;Huafeng Dong;Lili Tao
二维（2D）材料由于其独特的光学非线性而在锁模方面的应用引起了人们的极大兴趣。然而，这些二维材料大多数是半导体。在这项研究中，报道了一种新型半金属铟铋（InBi），它是一种具有奇异物理性质的拓扑节线半金属。采用液相剥离法制备了平均厚度为32.8 nm的InBi纳米材料。测量了掺铒光纤激光器的可饱和吸收特性，并成功实现了被动锁模操作。它的调制深度为3.21%，可饱和强度为100 MW cm−2，脉冲宽度约为859.97 fs，对应于1562.27 nm的中心波长和2.98 nm的3 dB带宽。实验结果为半金属InBi纳米材料在激光和光子学应用中的使用开辟了新途径。
Two-dimensional (2D) materials have drawn great interest for their applications in mode-locking due to their unique optical nonlinearities. However, most of these 2D materials are semi-conductors. In this study, a new kind of semi-metal indium bismuth (InBi) is reported which is a topological nodal-line semi-metal with exotic physical properties. The InBi nanomaterials were prepared through a liquid phase exfoliation method with an average thickness of 32.8 nm. The saturable absorption property was measured and passive mode-locking operation was successfully achieved in the Er-doped fiber laser. It exhibited a modulation depth of 3.21%, a saturable intensity of 100 MW cm−2 and a pulse width about 859.97 fs corresponding to the central wavelength of 1562.27 nm and 3 dB bandwidth of 2.98 nm. The experimental results open a new avenue for the use of semi-metals InBi nanomaterials in lasers and photonics applications.