A perfect absorber made of a graphene micro-ribbon metamaterial

Alaee, Rasoul; Farhat, Mohamed; Rockstuhl, Carsten; Lederer, F.

doi:10.1364/oe.20.028017

Cited by 549 publications

(307 citation statements)

References 40 publications

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“…This means that the absorption approaches unity, since the gold back mirror is optically thick and there is no transmission. Such perfect absorption is consistent with previous published work 52,53 . At other thicknesses, for example, s = 4.37 μ m, the reflectivity is larger than 48.6% and the phase smoothly spans over from almost -π to π with different graphene ribbon widths as shown in Fig.…”

Section: Resultssupporting

confidence: 93%

“…Depending on the geometry of the graphene nanostructures, and the dielectric constant and thickness of the dielectric layer, critical coupling condition can be satisfied even when the thickness s of the dielectric spacing layer is smaller than the wavelength. Consequently, we can achieve strong and even perfect absorption with monolayer graphene structures as theoretically proposed and recently demonstrated in experiments [52][53][54][55] . Graphene metasurfaces coupled with an optical cavity exhibit much more striking properties and applications beyond strong absorption.…”

Section: Resultsmentioning

confidence: 54%

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A Review of Graphene Plasmons and its Combination with Metasurface

Liu¹,

Bai²,

Zhou³

et al. 2017

J. Korean Ceram. Soc

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Metasurfaces utilizing engineered metallic nanostructures have recently emerged as an important means to manipulate the propagation of light waves in a prescribed manner. However, conventional metallic metasurfaces mainly efficiently work in the visible and near-infrared regime, and lack sufficient tunability. In this work, combining the pronounced plasmonic resonance of patterned graphene structures with a subwavelength-thick optical cavity, we propose and demonstrate novel graphene metasurfaces that manifest the potential to dynamically control the phase and amplitude of infrared light with very high efficiency. It is shown that the phase of the infrared light reflected from a simple graphene ribbon metasurface can span over almost the entire 2π range by changing the width of the graphene ribbons, while the amplitude of the reflection can be maintained at high values without significant variations. We successfully realize anomalous reflection, reflective focusing lenses, and non-diffracting Airy beams based on graphene metasurfaces. Our results open up a new paradigm of highly integrated photonic platforms for dynamic beam shaping and adaptive optics in the crucial infrared wavelength range.Metamaterials are rationally engineered composite materials with exotic properties not easily obtained or altogether unavailable in nature [1][2][3][4] . Metamaterials have attracted extensive attention from physicists, material scientists and engineers over the past decade, because they provide unprecedented opportunities to control light-matter interactions and light propagation in unusual ways. Recently, metasurfaces, a new class of two-dimensional (2D) metamaterials, have emerged at the frontier of metamaterials research [5][6][7] . In essence, metasurfaces introduce desired phase, amplitude, or polarizatin profiles by patterning planar subwavelength structures, offering additional, yet important degrees of freedom to mold the flow of light. Novel optical phenomena and devices based on metasurfaces include anomalous refraction or reflection 8,9 , strong spin-orbit interaction 10,11 , ultra-thin focusing or diverging lenses [12][13][14] , and holography 15,16 . Metasurfaces have also been applied to manipulate near-field surface waves [17][18][19][20] . Compared with their bulk metamaterial counterparts, the quasi-2D metasurfaces exhibit advantages of increased operation bandwidth and reduced losses 5,6 . These new designs are also compatible with planar, low-cost manufacturing and extremely suitable for device integration.So far, most metasurfaces rely on judiciously designed metallic nanostructures. At optical frequencies, metallic nanostructures with varied geometries support strong surface plasmon resonances, acting as local antennas in frequency selective surfaces (FSS) 21 that can eventually determine the direction, amplitude and polarization of refracted or reflected beams. However, it is known that the plasmonic response of metals becomes less pronounced as approaching mid-infrared or longer wavelengths because...

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 54%

A Review of Graphene Plasmons and its Combination with Metasurface

Liu¹,

Bai²,

Zhou³

et al. 2017

J. Korean Ceram. Soc

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“…10 The excitation of SPPs will cause strong field enhancement near graphene, and strong absorption of graphene can be realized. This method has been widely studied to realize absorption enhancement or even total absorption for graphene strips, 11,12 nano disks 13,14 and metamaterials. 15 However in the visible to near-IR spectrum, wave vector mismatch between graphene SPPs and vacuum light is very large and difficult to compensate, and graphene SPPs can not be excited, very high doping levels or small sized nanostructures are always required 16 which are difficult to realize.…”

Section: Introductionmentioning

confidence: 99%

Absorption enhancement and total absorption in a graphene-waveguide hybrid structure

Guo

Dai

et al. 2017

AIP Advances

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We propose a graphene/planar waveguide hybrid structure, and demonstrate total absorption in the visible wavelength range by means of attenuated total reflectance. The excitation of planar waveguide mode, which has strong near field enhancement and increased light interaction length with graphene, plays a vital role in total absorption. We analyze the origin and physical insight of total absorption theoretically by using an approximated reflectance, and show how to design such hybrid structure numerically. Utilizing the tunability of doped graphene, we discuss the possible application in optical modulators. We also achieve broadband absorption enhancement in near-IR range by cascading multiple graphene-waveguide hybrid structures. We believe our results will be useful not only for potential applications in optical devices, but also for studying other two-dimension materials.

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“…The multi-reflection process is illustrated in Figure 3. The overall reflection r is the sum of the direct reflection R 12 and the multiple reflections at the air-spacer interface, as follows [15]:…”

Section: Design and Theorymentioning

confidence: 99%

Design and Characterization of a Dual-Band Metamaterial Absorber Based on Destructive Interferences

Jamilan¹,

Azarmanesh²,

Zarifi³

2014

PIER C

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Abstract-We present the design, characterization, and experimental verification of a dual-band metamaterial absorber (MA) in the microwave frequencies. The proposed MA consists of a metallic gammadion-shaped structure and a complete metal layer, separated by a dielectric spacer. The results show that the proposed MA has two absorption peaks at nearly 5.6 GHz and 6 GHz with absorption rates of 97% and 99%, respectively. The interference theory is used to investigate the physical mechanism of the proposed MA. The experimental results are in good agreement with the theoretical predictions. Furthermore, it is verified by simulations that the absorption of the proposed MA is almost insensitive to the incident wave polarization and oblique incident angle for the both TM and TE modes. This MA has broad prospect of potential applications.

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A perfect absorber made of a graphene micro-ribbon metamaterial

Cited by 549 publications

References 40 publications

A Review of Graphene Plasmons and its Combination with Metasurface

A Review of Graphene Plasmons and its Combination with Metasurface

Absorption enhancement and total absorption in a graphene-waveguide hybrid structure

Design and Characterization of a Dual-Band Metamaterial Absorber Based on Destructive Interferences

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