Ultra-short pulse generation by a topological insulator based saturable absorber
Ultra-short pulse generation by a topological insulator based saturable absorber
复制标题
基于拓扑绝缘体的可饱和吸收体产生超短脉冲
DOI:
10.1063/1.4767919
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发表时间:
2012-11
影响因子:
4
通讯作者:
Tang, Dingyuan
中科院分区:
文献类型:
--
作者:
Chen, Yu;Wang, Zhiteng;Wen, Shuangchun;Tang, Dingyuan
Under strong laser radiation, a Dirac material, the topological insulator (TI) Bi2Te3, exhibits an optical transmittance increase as a result of saturable absorption. Based on an open-aperture Z-scan measurement at 1550 nm, we clearly show that the TI, Bi2Te3 under our investigation, is indeed a very-high-modulation-depth (up to 95%) saturable absorber. Furthermore, a TI based saturable absorber device was fabricated and used as a passive mode locker for ultrafast pulse formation at the telecommunication band. This contribution unambiguously shows that apart from its fantastic electronic property, a TI (Bi2Te3) may also possess attractive optoelectronic property for ultrafast photonics.
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