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Unveiling the dimension-dependence of femtosecond nonlinear optical properties of tellurium nanostructures.
Xiao, Qi; Ma, Bo; Fei, Xian; Liu, Duan-Wu; Zhai, Xin-Ping; Li, Xiang-Yang; Xiao, Ming-Jun; Peng, Yong; Wang, Qiang; Zhang, Hao-Li.
Afiliación
  • Xiao Q; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
  • Ma B; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
  • Fei X; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
  • Liu DW; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
  • Zhai XP; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
  • Li XY; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
  • Xiao MJ; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
  • Peng Y; Key Laboratory of Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou, 730000, P. R. China.
  • Wang Q; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
  • Zhang HL; State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China. haoli.zhang@lzu.edu.cn.
Nanoscale Horiz ; 6(11): 918-927, 2021 Oct 25.
Article en En | MEDLINE | ID: mdl-34490855
ABSTRACT
Low dimensional tellurium is currently of great interest for potential electronic applications due to the experimentally observed Weyl fermions and the excellent carrier mobility, on/off ratios and current-carrying capacity in devices. However, the optical properties of Te nanostructures are not well explored, especially in the field of nonlinear optics. Here, we prepared a series of Te nanostructures by electrochemical exfoliation and liquid phase exfoliation methods, including one-dimensional (1D) Te nanowires (NWs), quasi-1D Te nanorods (NRs), zero-dimensional (0D) Te nanodots (NDs) and two-dimensional (2D) Te nanosheets (NSs). Femtosecond Z-scan measurements reveal unique dimension-dependent nonlinear optical (NLO) properties. 1D Te NWs and quasi-1D Te NRs exhibited higher saturable absorption behavior than 0D Te nanostructures, while the 2D Te NSs are a high performance optical limiting material. Ultrafast transient absorption spectroscopy revealed the dimension-dependent exciton dynamics. The reverse saturable absorption of 2D Te NSs is derived from faster exciton relaxation and stronger excited state absorption. This work paves the way for the design of saturable absorbers with high performance and broadens the application of 2D Te in the field of laser protection and other novel ultrafast photonics.
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Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: Nanoscale Horiz Año: 2021 Tipo del documento: Article
Texto completo
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Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: Nanoscale Horiz Año: 2021 Tipo del documento: Article