Polarization-controlled multifrequency coherent perfect absorption in stereometamaterials

Lv, Wenjin; Bing, Jigang; Deng, Yiyuan; Duan, Di; Zhu, Zheng; Li, Yuxiang; Guan, Chunying; Shi, Jinhui

doi:10.1364/oe.26.017236

Cited by 21 publications

(7 citation statements)

References 45 publications

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“…In these cases, metasurfaces must carry also magnetic surface currents, which requires the use of at least two parallel arrays or some volumetric particles [14]. However, coherent metasurfaces can produce these desired effects using a secondary illumination source, even if the metasurface sheet is negligibly thin and no magnetic current can be excited [15][16][17][18][19][20][21]. Space-modulated metasurface boundaries, realized as finite-size layers carrying both electric and magnetic surface currents, can behave as asymmetric absorbers [12,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Coherent Asymmetric Absorbers

et al. 2022

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Most applications of metasurfaces require excitation and control of both electric and magnetic surface currents. For such purposes, the metasurface must have a finite thickness to handle magnetic surface currents. For metasurface sheets of negligible thickness that offer only electric response, coherent illumination can compensate the need to create discontinuities of the tangential electric field component using magnetic surface currents. Most of the known coherent metasurfaces are space uniform and can control only plane-wave absorption and specular reflection. However, it is also known that periodical space-modulated (inhomogeneous) metasurfaces can be used to realize anomalous reflection, refraction, and other useful effects. In this paper, we propose the concept of a coherently illuminated space-modulated metasurface that functions as a coherent asymmetric absorber. We study its behavior under nonideal illumination and suggest applications related to sensing.

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Section: Introductionmentioning

confidence: 99%

Coherent Asymmetric Absorbers

et al. 2022

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“…Since Landy et al firstly reported the concept of the perfect MMA consisting of two resonators coupled to the electric and magnetic fields separately to absorb the incident waves [7], the realizations of the high performance and multi-functional MMAs for various applications are always the important goals pursued by researchers [8,9]. Up to now, various MMAs, which are either multiple bands [10][11][12], polarization-insensitive [13,14] or polarization-sensitive [15,16], ultra-narrowband [17][18][19][20], and broadband [21], have been successfully realized to absorb EM waves across the whole spectrum from microwave to terahertz [22][23][24][25]. Chen proposed the interference theory to explain the physical mechanism of MMAs, an extremely broadband absorber based on destructive interference mechanism was demonstrated [26].…”

Section: Introductionmentioning

confidence: 99%

Circular dichroism assisted bi-directional absorbers

Yang¹,

Li²,

Wang³

et al. 2021

J. Phys. D: Appl. Phys.

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Chirality, a geometric property that is of great importance in chemistry, biology, and medicine, has spurred many breakthroughs in the field of multi-dimensional metasurfaces that provide efficient ways of flexibly manipulating amplitude and phase of circular polarization (CP) waves. As one of the most important applications, chiral metamaterials can be used to implement novel absorbers. Herein, an ultra-thin wideband circular dichroic asymmetric metasurface was implemented via loading resistive film into chiral resonators. Opposite and reversible polarization conversion and circular dichroism (CD) were realized as being illuminated by CP waves from both sides meanwhile. Theoretical derivation and simulation verify that the polarization conversion and CD enhancement utilizing multi-layer CD metasurface. It is also found that the orientation angle of the meta-atom of each layer plays an important role in the CD enhancement, which paves a new way for CD enhancement. In addition, the coupling between the CD resonators was utilized to manipulate CD. On this basis, an ultra-thin polarization-insensitive absorber was achieved by employing a C4 2×2 CD resonator array, which was identical illuminating from front and back sides. Circular dichroic absorbers possess great potential in practical applications, ranging from stealth technology, antenna isolation, multi-functional microwave devices, chiral sensing, and catalysis.

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“…As an example, a metasurface absorber in form of a lossy sheet can only absorb up to 50% of the incident power since the tangential electric field is continuos across the sheet. Nevertheless, coherent illumination of such sheets helps to reach 100% absorption [1][2][3][4][5][6]. However, physically, coherent perfect absorbers do not show additional advantages beyond their intended purpose of reducing reflections.…”

Section: Introductionmentioning

confidence: 99%

Coherent Asymmetric Absorber

Kuznetsov

Cuesta

Ptitcyn

et al. 2021

2021 Fifteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials)

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Coherent illumination allows additional flexibility over metasurface functionalities, with coherent perfect absorbers as one typical example. However, most of coherent metasurface devices are based on spatially uniform metasurfaces that offer a limited control over scattered waves. In this talk, we present an idea of coherent asymmetric absorbers with periodic surface impedances. The proposed metasurface can function as a perfect retroreflector for coherent incidences from one side and as a perfect absorber for incidences from the other side.

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Polarization-controlled multifrequency coherent perfect absorption in stereometamaterials

Cited by 21 publications

References 45 publications

Coherent Asymmetric Absorbers

Coherent Asymmetric Absorbers

Circular dichroism assisted bi-directional absorbers

Coherent Asymmetric Absorber

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