Plasmon-enhanced optical nonlinearity in pyramidal silver nanocrystals

被引：0
|
作者：
Pradhan, Amit kumar [1 ]
Kumar, Suman [2 ]
Ballav, Swastik [3 ]
Priyam, Amiya
Datta, Prasanta kumar [1 ]
机构：
[1] Indian Inst Technol Kharagpur, Dept Phys, Kharagpur 721302, India
[2] Cent Univ South Bihar, Sch Phys & Chem Sci, Dept Chem, Gaya 824236, India
[3] Univ Cent Florida, NanoSci Technol Ctr, Orlando, FL 32826 USA
来源：
OPTICS LETTERS | 2024年 / 49卷 / 20期
关键词：
SATURABLE ABSORPTION; METAL NANOPARTICLES; REFRACTION; GOLD; COMPOSITES;
D O I：
10.1364/OL.541804
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
This study investigates the coherent optical nonlinearity of two sets of anisotropic silver nanocrystals (NCs) showing plasmon peaks at 530 and 610 nm (hence named Ag530 and Ag-610 NCs, respectively). The nonlinear optical (NLO) properties of Ag-530 and Ag-610 NCs are compared with spherical silver NCs exhibiting plasmon peak at 420 nm (hence called Ag-420 NCs). Resonant excitation for all NCs, with Ag-610 NCs displaying exceptional trans(2PA), three-photon (3PA), and saturable (SA) absorption in Ag-610 NCs. In the 3PA regime, the effective nonlinear absorption coefficient of Ag-610 NCs is 2217c and 3407c that of Ag-420 and Ag-530 NCs, respectively, at a laser are reserved.
引用
收藏
页码：5985 / 5988
页数：4
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