拓扑绝缘体用于Cr2+:ZnSe激光器锁模的研究

拓扑绝缘体是一种全新的量子功能材料，除了奇异的电子学特性，它的光学特性也引起了研究者的强烈兴趣。申请人所在的团队研究了拓扑绝缘体的可饱和吸收特性并首先将其应用于光纤激光器的锁模当中，成功实现皮秒孤子脉冲输出。本申请提出将拓扑绝缘体可饱和吸收特性运用于Cr:ZnSe固体块材料激光锁模，将进一步研究和揭示拓扑绝缘体可饱和吸收体参数的变化规律，并通过将制备出的参数合适的拓扑绝缘体可饱和吸收镜用于Cr:ZnSe固体块材料激光，以首次实现稳定的固体块材料激光锁模运转并实验揭示其宽带工作特性，为发展具有宽工作带宽并能应用于中红外波段甚至于其他光波段固体固体块材料激光锁模的新型拓扑绝缘体可饱和吸收镜奠定基础。本研究项目具有重要的科学意义和应用前景。

Topological Insulator (TI) is a kind of novel quantum material. Besides its electronic properties, its optical properties have also been paid a lot of attention to. Our research team carried out investigation on the saturable absorption property and applied it to mode-locking fiber lasers for the first time. The mode-locked fiber lasers have successfully generated stable picosecond soliton pulses. This research proposal will focus on the investigation of mode-locking of Cr:ZnSe lasers using TI as a saturable absorber. Our research will further investigate and reveal the change rule of the parameters of the TI saturable absorption mirror (TISAM), and then carry out experiments of mode-locking Cr:ZnSe solid-state laser with some proper samples from the home-made TISAM, trying to successfully demonstrate the stable operation of TISAM mode-locked Cr:ZnSe laser and manifest the wide working width of TISAM . Our research will lay foundation for mode-locking of solid state lasers with wide-bandwidth TISAM. This research programme is of great scientific significance and promising in application.