Nanofocusing of longitudinally polarized light using absorbance modulation

	Nanofocusing of longitudinally polarized light using absorbance modulation
	Li Q.; Zhao X.; Zhang B.; Zheng Y.; Zhou L. Q.; Wang L. J.; Wu Y. X.; Fang Z. L.
	2014
发表期刊	Applied Physics Letters
ISSN	ISBN/0003-6951
卷号	104 期号:6 页码:4
摘要	Recently, many methods based on amplitude or phase modulation to reduce the focal spot and enhance the longitudinal field component of a tight-focused radially polarized light beam have been suggested. But they all suffer from spot size limit 0.36 lambda/NA and large side lobes strength in longitudinal component. Here, we report a method of generating a tighter focused spot by focusing radially polarized and azimuthally polarized beams of different wavelengths on a thin photochromic film through a high-numerical-aperture lens simultaneously. In this method, by suppressing the radial component and compressing the longitudinal component of radially polarized beam, absorbance modulation makes the ultimate spot size break the size limit of 0.36 lambda/NA with side-lobe intensity of longitudinal component below 1% of central-peak intensity. The theoretical analysis and simulation demonstrate that the focal spot size could be smaller than 0.1 lambda with nearly all radial component blocked at high intensity ratio of the two illuminating beams. (C) 2014 AIP Publishing LLC.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/44181
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li Q.,Zhao X.,Zhang B.,et al. Nanofocusing of longitudinally polarized light using absorbance modulation[J]. Applied Physics Letters,2014,104(6):4.
APA	Li Q..,Zhao X..,Zhang B..,Zheng Y..,Zhou L. Q..,...&Fang Z. L..(2014).Nanofocusing of longitudinally polarized light using absorbance modulation.Applied Physics Letters,104(6),4.
MLA	Li Q.,et al."Nanofocusing of longitudinally polarized light using absorbance modulation".Applied Physics Letters 104.6(2014):4.

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