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Zhu Y, Yuan W, Yu Y, et al. Metallic planar lens formed by coupled width-variable nanoslits for superfocusing. Opt Express. 2015;23(15):20124-31doi: 10.1364/OE.23.020124.
Zhu, Y., Yuan, W., Yu, Y., & Diao, J. (2015). Metallic planar lens formed by coupled width-variable nanoslits for superfocusing. Optics express, 23(15), 20124-31. https://doi.org/10.1364/OE.23.020124
Zhu, Yechuan, et al. "Metallic planar lens formed by coupled width-variable nanoslits for superfocusing." Optics express vol. 23,15 (2015): 20124-31. doi: https://doi.org/10.1364/OE.23.020124
Zhu Y, Yuan W, Yu Y, Diao J. Metallic planar lens formed by coupled width-variable nanoslits for superfocusing. Opt Express. 2015 Jul 27;23(15):20124-31. doi: 10.1364/OE.23.020124. PMID: 26367670.
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Opt Express. 2015 Jul 27;23(15):20124-31. doi: 10.1364/OE.23.020124.

Metallic planar lens formed by coupled width-variable nanoslits for superfocusing.

Optics express

Yechuan Zhu, Weizheng Yuan, Yiting Yu, Jinshuai Diao

PMID: 26367670 DOI: 10.1364/OE.23.020124

Abstract

We report a metallic planar lens based on the coupled nanoslits with variable widths for superfocusing. The influence of the interaction between two adjacent nanoslits on the phase delay is systematically investigated using the finite-difference time-domain (FDTD) method. Based on the geometrical optics and the wavefront reconstruction theory, an array of nanoslits perforated in a gold film is optimally designed to achieve the desired phase modulation for light beaming. The simulation result verifies our design in excellent agreement and the realized metallic lens reveals the superfocusing capability of 0.38λ in resolution, well beyond the diffraction limit.

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