Changchun Institute of Optics,Fine Mechanics and Physics,CAS
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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