Ultrasmall radial polarizer array based on patterned plasmonic nanoslits
Ultrasmall radial polarizer array based on patterned plasmonic nanoslits
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DOI：
10.1063/1.4761943
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发表时间：
2012-10
影响因子：
4
通讯作者：
K. Iwami;Miho Ishii;Y. Kuramochi;K. Ida;N. Umeda
中科院分区：
文献类型：
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作者：
K. Iwami;Miho Ishii;Y. Kuramochi;K. Ida;N. Umeda
我们研制了一种超小型径向或方位向偏振转换器，尺寸范围为10 ~ 100 μm。该转换器由一个半波片组成，分为四个象限，每个象限由周期性的金纳米狭缝以45°的步长在不同的方向上制成。制作了转换器及其阵列，并使用Senarmont方法和偏光显微镜进行了评估。由于金纳米狭缝的巨大双折射，每个狭缝段在633 nm的波长处实现了180°的延迟，并且证明了从线偏振到径向偏振的转换。
We developed an ultrasmall radial or azimuthal polarization converter of size ranged from 10 to 100 μm. The converter consists of a half-wave plate divided into four quadrants, each of which is made of periodic gold nanoslits at different orientations in steps of 45°. The converter and its array were fabricated and followed by an evaluation with the Senarmont method and the polarization microscopy. Due to the giant birefringence of the gold nanoslits, each slit segment achieved 180° retardation at the wavelength of 633 nm, and the conversion from linear to radial polarization was demonstrated.