Nonlinear optical properties of Au-Ag core-shell nanorods for all-optical switching

被引：17

作者：

Zhang, Luman ^{[1
]}

Dai, Hongwei ^{[1
]}

Wang, Xia ^{[2
]}

Yao, Linhua ^{[1
]}

Ma, Zongwei ^{[1
]}

Han, Jun-Bo ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Hubei, Peoples R China

[2] Wenhua Coll, Wuhan 430074, Hubei, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2017年 / 50卷 / 35期

关键词：

plasmon resonance; core-shell nanorods; third-order optical nonlinearity; one/two-photon figures of merits; ultrafast optical response; ENHANCED RAMAN-SCATTERING; PLASMON RESONANCE; TRIANGULAR NANOPRISM; NON LINEARITY; NANOSTRUCTURES; NANOPARTICLES; SPECTROSCOPY; COMPOSITE; DIPOLE; GLASS;

D O I：

10.1088/1361-6463/aa7c51

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Au-Ag core-shell nanorods with surface plasmon resonance wavelengths of 760-840 nm were prepared. Wavelength-dependent nonlinear absorption coefficients (beta) and nonlinear refractive indices (gamma) of the nanorods were measured by using Z-scan techniques. The corresponding one-photon and two-photon figures of merit (W and T) were calculated from beta and.. The results show that the requirements of W > 1 and T < 1 for the application of all-optical switching could be achieved for all the samples over a broad wavelength range. These observations make the Au-Ag core-shell nanorods a good candidate for all-optical switching devices.

引用

页数：8

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