Beyond-limit light focusing in the intermediate zone

K. R. Chen, W. H. Chu, H. C. Fang, C. P. Liu, C. H. Huang, H. C. Chui, C. H. Chuang, Y. L. Lo, C. Y. Lin, H. H. Hwung, Andy Y.G. Fuh

研究成果: 雜誌貢獻期刊論文同行評審

19 引文 斯高帕斯(Scopus)


We experimentally verify that a new nanolens of a designed plasmonic aperture can focus visible light to a single line with its width smaller than the limit of half the wavelength in the intermediate zone. The experimental measurement indicates that while the near field plays a role to increase the spot size in the near zone, it is negligible at the beyond-limit focused region; i.e., the focused light is dominated by the radiative fields. The image taken by the optical microscope shows that the fields focused have propagated to the far zone. Besides being of academic interest, the nanolens capable in achieving a lower diffraction limit in the intermediate zone is important for application possibilities.

頁(從 - 到)4497-4499
期刊Optics Letters
出版狀態已出版 - 1 12月 2011


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