Vol. 140

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2013-06-26

Creation of Super-Resolution Non-Diffraction Beam by Modulating Circularly Polarized Lightwith Ternary Optical Element

By Jingsong Wei, Yikun Zha, and Fuxi Gan
Progress In Electromagnetics Research, Vol. 140, 589-598, 2013
doi:10.2528/PIER13042002

Abstract

In order to obtain a super-resolution non-diffraction beam, we propose a fast searching method to design a ternary optical element combined with the circularly polarized light. The optimized results show that a beam with a spot size of 0.356λ and depth of focus of 8.28λ can be achieved by focusing with an oil lens of numerical aperture NA = 1.4 and refractive index of oil n = 1.5. The analysis reveals that the spot size of transverse component is 0.273λ, indicating that the super-resolution effect mainly comes from the transverse component. The spot size inside the media can theoretically reach down to 0.273λ because the spot size inside the media is mainly determined by the transverse component.

Citation


Jingsong Wei, Yikun Zha, and Fuxi Gan, "Creation of Super-Resolution Non-Diffraction Beam by Modulating Circularly Polarized Lightwith Ternary Optical Element," Progress In Electromagnetics Research, Vol. 140, 589-598, 2013.
doi:10.2528/PIER13042002
http://www.jpier.org/PIER/pier.php?paper=13042002

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