Broadband metamaterial absorber at mid-infrared using multiplexed cross resonators

Ma, Wei; Wen, Yongzheng; Yu, Xiaomei

doi:10.1364/oe.21.030724

Cited by 157 publications

(72 citation statements)

References 22 publications

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“…However, it may be highly challenging to satisfy this condition with the intrinsic IR absorptions in bulk materials and engineered IR absorption within planar photonic devices. Alternatively, highly selective emission can be achieved in artificially designed metallic nano/microstructures, such as, plasmonic structures,64, 65, 66, 67, 68, 69, 70, 71 metallic photonic crystals,72, 73, 74, 75 and metamaterials 76, 77, 78, 79, 80. However, tuning the emission of these microstructures to achieve selective IR emission covering the entire 8–13 μm wavelengths range can still be a significant challenge.…”

Section: Recent Progress On Highly Efficient and Daytime Radiative Comentioning

confidence: 99%

Radiative Cooling: Principles, Progress, and Potentials

2016

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The recent progress on radiative cooling reveals its potential for applications in highly efficient passive cooling. This approach utilizes the maximized emission of infrared thermal radiation through the atmospheric window for releasing heat and minimized absorption of incoming atmospheric radiation. These simultaneous processes can lead to a device temperature substantially below the ambient temperature. Although the application of radiative cooling for nighttime cooling was demonstrated a few decades ago, significant cooling under direct sunlight has been achieved only recently, indicating its potential as a practical passive cooler during the day. In this article, the basic principles of radiative cooling and its performance characteristics for nonradiative contributions, solar radiation, and atmospheric conditions are discussed. The recent advancements over the traditional approaches and their material and structural characteristics are outlined. The key characteristics of the thermal radiators and solar reflectors of the current state‐of‐the‐art radiative coolers are evaluated and their benchmarks are remarked for the peak cooling ability. The scopes for further improvements on radiative cooling efficiency for optimized device characteristics are also theoretically estimated.

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Section: Recent Progress On Highly Efficient and Daytime Radiative Comentioning

confidence: 99%

Radiative Cooling: Principles, Progress, and Potentials

2016

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“…Metamaterial-based infrared absorbers are usually fabricated using e-beam lithography, which results in high control over the shape and size of the metallic pattern at the expense of low fabrication throughput [1]. Such a low fabrication yield hinders the integration of metamaterial structures with MEMS.…”

Section: Introductionmentioning

confidence: 99%

Fabrication Tolerance Sensitivity in Large-Area Mid-Infrared Metamaterial Absorbers

Ghaderi

Karimi

Ayerden

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

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Metamaterial absorbers are photonic structures composed of an array of sub-wavelength metallic patterns. Results in literature are usually based on structures of nominal dimensions, despite the significant effect of fabrication tolerances on performance. This research aims to identify the main sources of uncertainty and to investigate their effect, notably that of an irregular surface quality (i.e., roughness) of the thin metallic layer and the lithography related variations in size and shape. The effect of the shape and positioning of the resonance peak was investigated and validated using mid-infrared metamaterial absorbers. This sensitivity analysis is essential to the batch fabrication of metamaterial absorbers for MEMS applications.

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“…[6][7][8][9] However, these absorbers are usually backed by a metallic plate. [10][11][12][13] The usual function of metallic backing is to provide electric boundary condition for incident plane wave, and enables to create magnetic resonance. Besides, it is used to avoid power transmission on the other side of the absorber.…”

Section: Introductionmentioning

confidence: 99%

A reflective-backing-free metamaterial absorber with broadband response

Wang

et al. 2017

J. Adv. Dielect.

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In this paper, we propose a polarization-independent and broadband perfect infrared (IR) metamaterial absorber (MA) without reflective backing. The proposed absorber is a periodic meta-atom array consisting of metal-dielectric-multilayer truncated cones which can absorb 80% EM wave from 50.70 to 81.87 THz, while transmit 80% EM wave from 0 to 37.71 THz. With the decreasing of frequency, the transmissivity increases, which is close to 100% from 0 to 5 THz. We can broaden the absorption bandwidth of the MA by cascading multi-layers truncated cones. Furthermore, the proposed IR MA promises to be one desirable stealth material for radar-IR compatibility.

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Broadband metamaterial absorber at mid-infrared using multiplexed cross resonators

Cited by 157 publications

References 22 publications

Radiative Cooling: Principles, Progress, and Potentials

Radiative Cooling: Principles, Progress, and Potentials

Fabrication Tolerance Sensitivity in Large-Area Mid-Infrared Metamaterial Absorbers

A reflective-backing-free metamaterial absorber with broadband response

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