Journal ArticleDOI
Extreme-angle broadband metamaterial lens
Nathan Kundtz,David R. Smith +1 more
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TLDR
It is demonstrated how powerful emerging techniques in the field of transformation optics can be used to harness the flexibility of gradient index materials for imaging applications to achieve a new class of optical devices.Abstract:
One of the more promising uses of metamaterials is in imaging, where the capability to control the propagation of light could lead to new applications. In particular, the realization of a broadband metamaterial lens that has an almost complete hemispherical field of view that is focused on a flat plane represents a significant step towards such new uses.read more
Citations
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Journal ArticleDOI
Coding metamaterials, digital metamaterials and programmable metamaterials
TL;DR: Digital metamaterials consisting of two kinds of unit cells whose different phase responses allow them to act as ‘0’ and ‘1’ bits are developed to enable controlled manipulation of electromagnetic waves.
Journal ArticleDOI
Gradient-index meta-surfaces as a bridge linking propagating waves and surface waves
TL;DR: It is demonstrated theoretically and experimentally that a specific gradient-index meta-surface can convert a PW to a SW with nearly 100% efficiency, and may pave the way for many applications, including high-efficiency surface plasmon couplers, anti-reflection surfaces, light absorbers, and so on.
Posted Content
Coding Metamaterials, Digital Metamaterials and Programming Metamaterials
TL;DR: In this paper, Wu et al. proposed a digital metamaterial with two kinds of unit cells with 0 and π phase responses, which they named as "0" and "1" elements.
Journal ArticleDOI
High-efficiency broadband anomalous reflection by gradient meta-surfaces.
Shulin Sun,Kuang-Yu Yang,Chih Ming Wang,Ta Ko Juan,Wei Ting Chen,Chun Yen Liao,Qiong He,Shiyi Xiao,Wen Ting Kung,Guang-Yu Guo,Guang-Yu Guo,Lei Zhou,Din Ping Tsai,Din Ping Tsai +13 more
TL;DR: This work combines theory and experiment to demonstrate that a carefully designed gradient meta-surface supports high-efficiency anomalous reflections for near-infrared light following the generalized Snell's law, and the reflected wave becomes a bounded surface wave as the incident angle exceeds a critical value.
Journal ArticleDOI
Dual-polarity plasmonic metalens for visible light
Xianzhong Chen,Lingling Huang,Lingling Huang,Holger Mühlenbernd,Guixin Li,Benfeng Bai,Qiaofeng Tan,Guofan Jin,Cheng-Wei Qiu,Shuang Zhang,Thomas Zentgraf +10 more
TL;DR: A counter-intuitive dual-polarity flat lens based on helicity-dependent phase discontinuities for circularly polarized light is experimentally demonstrated by controlling the helicity of the input light, and the positive and negative polarity are interchangeable in one identical flat lens.
References
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Journal ArticleDOI
Controlling Electromagnetic Fields
TL;DR: This work shows how electromagnetic fields can be redirected at will and proposes a design strategy that has relevance to exotic lens design and to the cloaking of objects from electromagnetic fields.
Journal ArticleDOI
Metamaterial Electromagnetic Cloak at Microwave Frequencies
David Schurig,Jack J. Mock,B.J. Justice,Steven A. Cummer,John B. Pendry,Anthony F. Starr,David R. Smith +6 more
TL;DR: This work describes here the first practical realization of a cloak of invisibility, constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies.
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Optical Conformal Mapping
TL;DR: A general recipe for the design of media that create perfect invisibility within the accuracy of geometrical optics is developed, which can be applied to escape detection by other electromagnetic waves or sound.
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Determination of effective permittivity and permeability of metamaterials from reflection and transmission coefficients
TL;DR: In this article, the authors analyzed the reflection and transmission coefficients calculated from transfer matrix simulations on finite lengths of electromagnetic metamaterials, to determine the effective permittivity and permeability.
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RIG-I-Mediated Antiviral Responses to Single-Stranded RNA Bearing 5' Phosphates
Andreas Pichlmair,Oliver Schulz,Choon Ping Tan,Tanja I. Näslund,Peter Liljeström,Friedemann Weber,Caetano Reis e Sousa +6 more
TL;DR: It is shown that influenza A virus infection does not generate dsRNA and that RIG-I is activated by viral genomic single-stranded RNA (ssRNA) bearing 5′-phosphates, and suggested that its ability to sense 5'-phosphorylated RNA evolved in the innate immune system as a means of discriminating between self and nonself.