Photoinduced tunable birefringence and dichroism in silver nanogratings
Photoinduced tunable birefringence and dichroism in silver nanogratings
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DOI：
10.1364/josab.399604
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发表时间：
2020-10
影响因子：
1.9
通讯作者：
Razieh Talebi;Forough Taheri Ghahfarokhi;D. Vashaee
中科院分区：
文献类型：
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作者：
Razieh Talebi;Forough Taheri Ghahfarokhi;D. Vashaee
银纳米光栅是各向异性等离子体纳米结构，由于其大的双折射和二向色性而在光学元件中具有潜在的应用前景。我们通过单束低功率线偏振激光束照射，在亚波长 Ag-AgCl 薄膜中诱导线性双折射和线性二色性。激光束沿激光偏振方向排列银纳米粒子并形成纳米光栅。我们使用斯托克斯参数来确定银排列纳米结构中的线性双折射和线性二色性。银纳米光栅的线性二色性和线性双折射值可以通过操纵纳米光栅的空间周期来控制。还研究了二色性和双折射的色散特性。
Silver nanogratings are anisotropic plasmonic nanostructures with potential application in optical components due to their large birefringence and dichroism. We induced linear birefringence and linear dichroism in subwavelength Ag-AgCl films by irradiating with a single low-power linearly polarized laser beam. The laser beam aligns silver nanoparticles in the direction of laser polarization and forms nanograting. We used Stokes parameters to determine linear birefringence and linear dichroism in silver aligned nanostructures. The values of linear dichroism and linear birefringence in silver nanogratings are controllable through manipulating the spatial period of nanogratings. The dispersion characteristic of dichroism and birefringence is also investigated.