Tin telluride (SnTe), a member of group IV-VI semiconductors, has attracted significant attention due to its super thermoelectricity and ferroelectricity. In addition, SnTe was reported to have a direct bandgap (0.18 eV) and relatively good oxidation resistance, therefore, it has huge application potential in optoelectronics. However, up to now, the study of interaction between light and SnTe is still immature. In this paper, SnTe quantum dots (QDs) were prepared by the ultrasonication assisted liquid-phase exfoliation (UALPE) method and the broadband absorption properties of SnTe QDs were demonstrated. Furthermore, by employing SnTe QDs as a saturable absorber (SA), a stable mode-locked Yb-doped fiber laser (YDFL) with a pulse duration of 265 ps and an output power of 5.68 mW was obtained. Our results demonstrated that SnTe could be a promising candidate in the mode-locked YDFL system and photonic technology application.

碲化锡（SnTe）是IV-VI组半导体的成员，由于其超热电和铁电性而备受关注。另外，据报道，SnTe具有直接的带隙（0.18 eV）和相对较好的抗氧化性，因此，它在光电子学中具有巨大的应用潜力。但是，到目前为止，关于光与SnTe之间相互作用的研究仍不成熟。本文通过超声辅助液相剥落（UALPE）方法制备了SnTe量子点（QDs），并证明了SnTe QDs的宽带吸收特性。此外，通过将SnTe QD用作可饱和吸收体（SA），获得了具有265 ps的脉冲持续时间和5.68 mW的输出功率的稳定锁模Yb掺杂光纤激光器（YDFL）。