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Analog study of near-field focusing and subwavelength imaging with nonlinear transmission-line metamaterial

Science China(Information Sciences) 2013年第12期56卷 91-98页

作者： WANG ZhengBin FENG YiJun ZHAO JunMing JIANG Tian Department of Electronic Science and Engineering Nanjing University College of Science Nanjing University of Posts and Telecommunications

In this paper,we report an analog study of realizing near-field focusing and near-perfect imaging at harmonic frequencies using a two-dimensional(2D)left-handed nonlinear transmission line(LH NLTL)***,we give a detailed procedure of designing LH NLTL and right-handed(RH)transmission line media that match with each other at ***,through microwave circuit simulations,we observe strong surface waves at the boundaries between RH and LH NLTL metamaterials,which are consistent with the theoretical analysis of an LH linear ***,we show that the LH NLTL metamaterial can act as a flat nonlinear lens that can create,with a subwavelength resolution,an image of harmonic fields of the source which is opaque at the fundamental frequency.

关键词： nonlinear metamaterial left-handed nonlinear transmission line harmonic generation near-field focusing subwavelength imaging

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Tunable plasmofluidic lens for subwavelength imaging

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光电工程 2017年第3期44卷 326-330页

作者： Beibei Zeng Center for Integrated Nanotechnologies Los Alamos National Laboratory

A tunable plasmofluidic lens consisting of nanoslit arrays on a metal film is proposed for subwavelength imaging in far field at different *** nanoslit arrays with constant depths but varying widths could generate desired optical phase retardations based on the propagation property of the surface plasmon polaritons(SPPs)through the metal-dielectric-metal(MDM)nanoslit *** demonstrate the tunability of the plasmofluidic lens for subwavelength imaging by changing the surrounding dielectric *** work provides a novel approach for developing integrative tunable plasmofluidic lens for a variety of lab-on-chip applications.

关键词： surface plasmon polaritons subwavelength imaging optofluidics wavefront modulation

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Negative refraction in two-dimensional photonic crystals

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Progress in Natural Science:Materials International 2006年第10期16卷 1027-1032页

作者： REN Xiaobin, REN Kun, FENG Zhifang, FENG Shuai and REN Cheng ( School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China) School of Physics Science and Information Technology Liaocheng University Liaocheng 252059 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China

Recent progress made in research on negative refraction in two-dimensional photonic crystals is reviewed. Special attentions are paid to the research results of our group. We explore the underlying mechanism governing the occurrence of negative refraction in periodic and quasiperiodic photonic crystals. These results may be useful references for the application of photonic crystals. The perspectives of future research on negative refraction are briefly predicted.

关键词： negative refraction photonic crystals superlens subwavelength imaging equifreqnency surface.

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