Optical-intensity modulators have increasingly important applications in optoelectronic field. However, it still remains a challenge to find an optical intensity modulation material with stable chemical properties, high efficiency and low cost in the infrared region. Here, we present a liquid phase exfoliation-based programme for the preparation of InSb nanosheets. Experimentally, the mechanically exfoliated InSb nanosheets possess preferable morphology and stable chemical properties, which means this programme is reliable and efficient. However, InSb nanosheets have completely different Raman peaks compared with bulk. Afterwards, the InSb nanosheets were used to realize switchable dual-wavelength mode locking around 1565 nm. This work has high practical value and will lay a solid foundation for the large-scale study of optical-intensity modulator based on Sb compounds.

光强度调制器在光电领域具有越来越重要的应用。然而，寻找在红外区域具有稳定化学性质，高效率和低成本的光强度调制材料仍然是挑战。在这里，我们介绍了一种基于液相剥离的程序，用于制备InSb纳米片。在实验上，机械剥离的InSb纳米片具有较好的形态和稳定的化学性质，这意味着该程序可靠且有效。然而，与块状相比，InSb纳米片具有完全不同的拉曼峰。之后，InSb纳米片用于实现1565 nm左右的可切换双波长模式锁定。