Metallic planar lens formed by coupled widthvariable nanoslits for superfocusing

Yechuan Zhu; Weizheng Yuan; Yiting Yu; Jinshuai Diao

doi:10.1364/OE.23.020124

Metallic planar lens formed by coupled widthvariable nanoslits for superfocusing

Yechuan Zhu, Weizheng Yuan, Yiting Yu, Jinshuai Diao

School of Mechanical Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

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.

Original language	English
Pages (from-to)	20124-20131
Number of pages	8
Journal	Optics Express
Volume	23
Issue number	15
DOIs	https://doi.org/10.1364/OE.23.020124
State	Published - 27 Jul 2015

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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.",

author = "Yechuan Zhu and Weizheng Yuan and Yiting Yu and Jinshuai Diao",

note = "Publisher Copyright: {\textcopyright} 2015 Optical Society of America.",

year = "2015",

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T1 - Metallic planar lens formed by coupled widthvariable nanoslits for superfocusing

AU - Zhu, Yechuan

AU - Yuan, Weizheng

AU - Yu, Yiting

AU - Diao, Jinshuai

PY - 2015/7/27

Y1 - 2015/7/27

N2 - 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.

AB - 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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JO - Optics Express

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IS - 15

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Metallic planar lens formed by coupled widthvariable nanoslits for superfocusing

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