The ultrafast tunable saturable absorption of three azo-Schiff base ligands and related metal complexes

被引：4

作者：

Xiao, Xingcheng ^{[1
]}

Liu, Mengyao ^{[2
]}

Zhou, Jianliang ^{[2
]}

Zhu, Haixia ^{[1
]}

Wang, Chang ^{[1
]}

Chen, Zhihui ^{[1
]}

Wang, Yingwei ^{[1
]}

Xiao, Si ^{[1
]}

He, Jun ^{[1
]}

机构：

[1] Cent South Univ, Sch Phys & Elect, Hunan Prov Key Lab Nanophoton & Devices, 932 South Lushan Rd, Changsha 410083, Hunan, Peoples R China

[2] Cent South Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China

来源：

OPTICAL MATERIALS | 2022年 / 132卷

基金：

中国国家自然科学基金;

关键词：

Nonlinear optics; Saturable absorption; Azo-Schiff base; Metal complex; NONLINEAR-OPTICAL ABSORPTION; 2-PHOTON ABSORPTION; Z-SCAN; CRYSTAL-STRUCTURES; AZOBENZENE; POLYMERS; ISOMERIZATION; PORPHYRINS;

D O I：

10.1016/j.optmat.2022.112773

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three azo-Schiff base ligands with large conjugated systems and five related transition metal complexes were synthesized and investigated by femetosecond open-aperture Z-scan and pump-probe system. The ultrafast tunable saturable absorption of the ligands and their metal complexes were observed at 400 nm wavelength. The obtained third-order nonlinear optical (NLO) absorption coefficients of eight compounds are evaluated to be -8.49 similar to -80.63 cm/GW. Meanwhile, the ultrafast carrier relaxation time (187-592 fs) of all compounds was observed in the pump-probe experiment. The modulated impacts of metal coordination on NLO responses are analyzed by a five-level energy system. We deem that the performance of metal complexes is determined by the number of shell electrons of central metal. All the results indicate that those compounds have potential applications for tunable saturable absorber in NLO field.

引用

页数：5

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