| Focusing properties of the visible light wave through plasmonic lenses with subwavelength chirped slits | |
| Feng, Di; Zhang, Chunxi; Yang, Yuanhong | |
| 2012 | |
| 会议名称 | 2012 2nd International Conference on Advanced Materials and Information Technology Processing, AMITP 2012 |
| 会议录名称 | Advanced Materials and Information Technology Processing II |
| 页码 | 356-362 |
| 会议日期 | October 17, 2012 - October 18, 2012 |
| 会议地点 | Taipei, Taiwan |
| 出版地 | Germany |
| 出版者 | Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670,Germany |
| 产权排序 | 1 |
| 摘要 | Focusing properties of a new kind of plasmonic lenses are investigated in the visible wavelength range through a subwavelength metallic chirped slit arrays which have the same depth but chirped widths. The chirped widths of slits are like a piece-wise-linear distribution which will be approximated by linearly increasing the width of a subwavelength feature and can build up a required phase front for focusing. We analyzed the focusing characteristics of different metallic lenses (silver and gold, respectively) with chirped widths that are obtained by generalizing the relevant phase delay for TE- and TM-polarized incident waves, for different f-numbers of lenses and for different material thickness, respectively. Meanwhile, the comparison of the metallic and dielectric lenses is also presented. The results of calculations show that, the metallic lenses are more sensitive to the polarization of incidence wave than that of dielectric lenses, and can get narrower full-width half-maximum (FWHM) beam width than that of dielectric lenses for TM-polarized incident waves, respectively. No matter which f-number we choose, the FWHM of dielectric lenses are higher than the plasmonic lenses, and the plasmonic lenses can get a higher focal resolution than dielectric lenses do. This kind of plasmonic lenses should have a good potential for applications in photonic and plasmonic integrated devices, sensing, and nano-optical manipulations, etc. |
| 作者部门 | 瞬态光学技术研究室 |
| 收录类别 | CPCI（ISTP） ; EI |
| ISBN号 | 9783037855232 |
| 语种 | 英语 |
| ISSN号 | 10226680 |
| 文献类型 | 会议论文 |
| 条目标识符 | http://ir.opt.ac.cn/handle/181661/20552 |
| 专题 | 瞬态光学研究室 |
| 推荐引用方式 GB/T 7714 | Feng, Di,Zhang, Chunxi,Yang, Yuanhong. Focusing properties of the visible light wave through plasmonic lenses with subwavelength chirped slits[C]. Germany:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670,Germany,2012:356-362. |
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| Focusing properties （369KB） | 限制开放 | CC BY-NC-SA | 请求全文 | |||
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