Total absorption of unpolarized light by crossed gratings

Popov, Evgeni; Maystre, D.; McPhedran, R. C.; Nevière, M.; Hutley, M. C.; Derrick, G. H.

doi:10.1364/oe.16.006146

Cited by 92 publications

(56 citation statements)

References 22 publications

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“…[ 2 ] Another type of resonant electromagnetic wave absorber, known as the crossed grating absorber, uses a refl ective metal plane with an etched shallow periodic grid. [ 7 ] A resonance is created due to the interaction between the periodic grid and incident radiation, creating a period of anomalous diffraction. This absorber had developments as early as 1902 when R. W. Wood postulated the possible effects of anomalous diffraction.…”

Section: Resonant Absorbersmentioning

confidence: 99%

“…[ 11 ] Recently, this has been extended to unpolarized light with the use of doubly-periodic crossed diffraction gratings. [ 7 ] Circuit Analog (CA) absorbers, another type of resonant electromagnetic absorber that can be considered an extension of the Salisbury screen, consist of one or more sheets composed of both resistive and reactive components (i.e. a lossy frequency selective surface, FSS) arranged in a periodic array in front of a single ground plane.…”

Section: Resonant Absorbersmentioning

confidence: 99%

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Metamaterial Electromagnetic Wave Absorbers

2012

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The advent of negative index materials has spawned extensive research into metamaterials over the past decade. Metamaterials are attractive not only for their exotic electromagnetic properties, but also their promise for applications. A particular branch–the metamaterial perfect absorber (MPA)–has garnered interest due to the fact that it can achieve unity absorptivity of electromagnetic waves. Since its first experimental demonstration in 2008, the MPA has progressed significantly with designs shown across the electromagnetic spectrum, from microwave to optical. In this Progress Report we give an overview of the field and discuss a selection of examples and related applications. The ability of the MPA to exhibit extreme performance flexibility will be discussed and the theory underlying their operation and limitations will be established. Insight is given into what we can expect from this rapidly expanding field and future challenges will be addressed.

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Section: Resonant Absorbersmentioning

confidence: 99%

Section: Resonant Absorbersmentioning

confidence: 99%

Metamaterial Electromagnetic Wave Absorbers

2012

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“…There have been many studies of geometries composed of a periodic array of slits [19][20][21][22][23][24] or grooves. 11,12,[25][26][27][28][29][30][31][32] There is also a substantial body of work concerning the enhanced transmission properties of arrays of holes [33][34][35][36][37][38][39][40][41][42] ͑also Ref. 43 and references therein͒.…”

Section: Introductionmentioning

confidence: 99%

Babinet’s principle and the band structure of surface waves on patterned metal arrays

Edmunds

Taylor

Hibbins

et al. 2010

Journal of Applied Physics

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The microwave response of an array of square metal patches and its complementary structure, an array of square holes, has been experimentally studied. The resonant phenomena, which yield either enhanced transmission or reflection, are attributed to the excitation of diffractively coupled surface waves. The band structure of these surface modes has been quantified for both p-͑transverse magnetic͒ and s-͑transverse electric͒ polarized radiation and is found to be dependent on the periodicity of the electric and magnetic fields on resonance. The results are in excellent accord with predictions from finite element method modeling and the electromagnetic form of Babinet's principle ͓Babinet, C. R. Acad. Sci. 4, 638 ͑1837͔͒.

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“…(ii) A second approach consists in using ordered periodic structures, as found in some nocturnal insects, where they produce the moth eye effect [2]. This alternative has been pioneered by experimental and theoretical work showing total light absorption (TLA) in the visible using metallic gratings [3][4][5]. In this context, the Salisbury screen [6,7], consisting of a thin absorbing layer placed above a reflecting surface, has been known to produce TLA, and it can be integrated in thin structures using magnetic-mirror metamaterials [8].…”

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confidence: 99%

Complete Optical Absorption in Periodically Patterned Graphene

2012

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We demonstrate that 100% light absorption can take place in a single patterned sheet of doped graphene. General analysis shows that a planar array of small particles with losses exhibits full absorption under critical-coupling conditions provided the cross section of each individual particle is comparable to the area of the lattice unit cell. Specifically, arrays of doped graphene nanodisks display full absorption when supported on a substrate under total internal reflection and also when lying on a dielectric layer coating a metal. Our results are relevant for infrared light detectors and sources, which can be made tunable via electrostatic doping of graphene. DOI: 10.1103/PhysRevLett.108.047401 PACS numbers: 78.67.Wj, 42.25.Bs, 78.20.Ci Light absorption plays a central role in optical detectors and photovoltaics. Inspired by nature, two different routes have been investigated to achieve perfect absorption. (i) A first one consists in relying on diffusion in disordered lossy surfaces (e.g., black silver and carbon). Engineered materials have been synthesized following this solution to produce extraordinary broadband light absorption (e.g., dense arrays of carbon nanotubes [1]). (ii) A second approach consists in using ordered periodic structures, as found in some nocturnal insects, where they produce the moth eye effect [2]. This alternative has been pioneered by experimental and theoretical work showing total light absorption (TLA) in the visible using metallic gratings [3][4][5]. In this context, the Salisbury screen [6,7], consisting of a thin absorbing layer placed above a reflecting surface, has been known to produce TLA, and it can be integrated in thin structures using magnetic-mirror metamaterials [8]. Similar phenomena have been reported at infrared (IR) [9][10][11] and microwave [12,13] frequencies, including omnidirectional TLA [14], which has been realized by using periodic surfaces supporting localized plasmon excitations.The availability of high-quality graphene as a stable material with extraordinary (opto)electronic properties [15-17] makes a compelling case for exploring its ability to harvest light for potential application to optoelectronics, with the advantage of being optically tunable via electrostatic doping [18]. However, a single sheet of homogeneous graphene is poorly absorbing [19] (about 2.3% absorption), so the challenge is to transform it into a perfect absorber, for which we can rely on its power to host extremely confined plasmons [20,21].In this Letter, we show that a single sheet of doped graphene, patterned into a periodic array of nanodisks, exhibits 100% light absorption. We first discuss the extinction cross section of graphene disks (i.e., the sum of light absorption and elastic scattering), which can exceed by over an order of magnitude their geometrical area [21]. These disks therefore belong to the class of absorbing particles that can be arranged in periodic planar arrays such that their cross section exceeds the area of the unit cell. We further assume here that a...

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Total absorption of unpolarized light by crossed gratings

Cited by 92 publications

References 22 publications

Metamaterial Electromagnetic Wave Absorbers

Metamaterial Electromagnetic Wave Absorbers

Babinet’s principle and the band structure of surface waves on patterned metal arrays

Complete Optical Absorption in Periodically Patterned Graphene

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