Extreme Asymmetry in Metasurfaces via Evanescent Fields Engineering: Angular-Asymmetric Absorption

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@article{271ececf75bd4e21aa95d00449180cab,
title = "Extreme Asymmetry in Metasurfaces via Evanescent Fields Engineering: Angular-Asymmetric Absorption",
abstract = "On the quest towards full control over wave propagation, the development of compact devices that allow asymmetric response is a challenge. In this Letter, we introduce a new paradigm for the engineering of asymmetry in planar structures, revealing and exploiting unilateral excitation of evanescent waves. We test the idea with the design and experimental characterization of a metasurface for angular-asymmetric absorption. The results show that the contrast ratio of absorption (the asymmetry level) can be arbitrarily engineered from zero to infinity for waves coming from two oppositely tilted angles. We demonstrate that the revealed asymmetry effects cannot be realized using conventional diffraction gratings, reflectarrays, and phase-gradient metasurfaces. This Letter opens up promising possibilities for wave manipulation via evanescent waves engineering with applications in one-side detection and sensing, angle-encoded steganography, flat nonlinear devices, and shaping the scattering patterns of various objects.",
author = "Xuchen Wang and Ana D{\'i}az-Rubio and Asadchy, {Viktar S.} and Grigorii Ptitcyn and Generalov, {Andrey A.} and Juha Ala-Laurinaho and Tretyakov, {Sergei A.}",
year = "2018",
month = "12",
day = "19",
doi = "10.1103/PhysRevLett.121.256802",
language = "English",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "25",

}

RIS - Lataa

TY - JOUR

T1 - Extreme Asymmetry in Metasurfaces via Evanescent Fields Engineering

T2 - Angular-Asymmetric Absorption

AU - Wang, Xuchen

AU - Díaz-Rubio, Ana

AU - Asadchy, Viktar S.

AU - Ptitcyn, Grigorii

AU - Generalov, Andrey A.

AU - Ala-Laurinaho, Juha

AU - Tretyakov, Sergei A.

PY - 2018/12/19

Y1 - 2018/12/19

N2 - On the quest towards full control over wave propagation, the development of compact devices that allow asymmetric response is a challenge. In this Letter, we introduce a new paradigm for the engineering of asymmetry in planar structures, revealing and exploiting unilateral excitation of evanescent waves. We test the idea with the design and experimental characterization of a metasurface for angular-asymmetric absorption. The results show that the contrast ratio of absorption (the asymmetry level) can be arbitrarily engineered from zero to infinity for waves coming from two oppositely tilted angles. We demonstrate that the revealed asymmetry effects cannot be realized using conventional diffraction gratings, reflectarrays, and phase-gradient metasurfaces. This Letter opens up promising possibilities for wave manipulation via evanescent waves engineering with applications in one-side detection and sensing, angle-encoded steganography, flat nonlinear devices, and shaping the scattering patterns of various objects.

AB - On the quest towards full control over wave propagation, the development of compact devices that allow asymmetric response is a challenge. In this Letter, we introduce a new paradigm for the engineering of asymmetry in planar structures, revealing and exploiting unilateral excitation of evanescent waves. We test the idea with the design and experimental characterization of a metasurface for angular-asymmetric absorption. The results show that the contrast ratio of absorption (the asymmetry level) can be arbitrarily engineered from zero to infinity for waves coming from two oppositely tilted angles. We demonstrate that the revealed asymmetry effects cannot be realized using conventional diffraction gratings, reflectarrays, and phase-gradient metasurfaces. This Letter opens up promising possibilities for wave manipulation via evanescent waves engineering with applications in one-side detection and sensing, angle-encoded steganography, flat nonlinear devices, and shaping the scattering patterns of various objects.

UR - http://www.scopus.com/inward/record.url?scp=85059163957&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.121.256802

DO - 10.1103/PhysRevLett.121.256802

M3 - Article

VL - 121

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 25

M1 - 256802

ER -

ID: 31120263