Ultra-thin and broadband tunable metamaterial graphene absorber

Xiong, Han; Wu, Yingbo; Dong, Jinlong; Tang, Ming‐Chun; Jiang, Yannan; Zeng, Xiaoping

doi:10.1364/oe.26.001681

Cited by 121 publications

(52 citation statements)

References 24 publications

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“…The presented antenna is very suitable for UWB applications. The antenna performance may be improved further using metasurfaces or graphene hybrid structures …”

Section: Resultsmentioning

confidence: 99%

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A planar miniaturized UWB dual‐polarization multiple‐input‐multiple‐output slot antenna

Tan

Wei

et al. 2019

Micro & Optical Tech Letters

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A planar miniaturized ultra‐wideband (UWB) dual‐polarization multiple‐input‐multiple‐output (MIMO) slot antenna is presented in this article. Two orthogonal microstrip lines are utilized to feed antenna, which can excite both orthogonal modes in two orthogonal‐stepped slots to realize dual‐polarization characteristics. Two orthogonal‐stepped slots are its main radiators. The overall size of the presented antenna is only 32 × 22 × 0.8 mm3. The antenna was built and measured. The measurement of common –10 dB impedance bandwidth reaches 7.56 GHz (110.7%, 3.05‐10.61 GHz). Port isolation is greater than 18 dB over the entire working band. The radiation patterns and gains are stable over the whole working band.

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“…The presented antenna is very suitable for UWB applications. The antenna performance may be improved further using metasurfaces or graphene hybrid structures …”

Section: Resultsmentioning

confidence: 99%

“…The antenna performance may be improved further using metasurfaces or graphene hybrid structures. [24][25][26]…”

Section: Discussionmentioning

confidence: 99%

A planar miniaturized UWB dual‐polarization multiple‐input‐multiple‐output slot antenna

Tan

Wei

et al. 2019

Micro & Optical Tech Letters

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“…It is therefore anticipated that the independent tuning of Q r and Q a by individual parameters can facilitate the easy design. What's more, absorbers in extreme forms, like ultrathin and compact absorbers, are desirable for scaling down the device size and/or minimizing parasitic effects, such as thermal leak conductance and large heat capacity for bolometric detector arrays [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Ultrathin and Electrically Tunable Metamaterial with Nearly Perfect Absorption in Mid-Infrared

et al. 2019

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Metamaterials integrated with graphene exhibit tremendous freedom in tailoring their optical properties, particularly in the infrared region, and are desired for a wide range of applications, such as thermal imaging, cloaking, and biosensing. In this article, we numerically and experimentally demonstrate an ultrathin (total thickness < λ 0 / 15 ) and electrically tunable mid-infrared perfect absorber based on metal–insulator–metal (MIM) structured metamaterials. The Q-values of the absorber can be tuned through two rather independent parameters, with geometrical structures of metamaterials tuning radiation loss (Qr) of the system and the material loss (tanδ) to further change mainly the intrinsic loss (Qa). This concise mapping of the structural and material properties to resonant mode loss channels enables a two-stage optimization for real applications: geometrical design before fabrication and then electrical tuning as a post-fabrication and fine adjustment knob. As an example, our device demonstrates an electrical and on-site tuning of ~5 dB change in absorption near the perfect absorption region. Our work provides a general guideline for designing and realizing tunable infrared devices and may expand the applications of perfect absorbers for mid-infrared sensors, absorbers, and detectors in extreme spatial-limited circumstances.

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“…In recent years, metamaterial absorbers, as a novel research field of electromagnetic metamaterials, have attracted extensive research interest for the application of physics and material science. Tunable absorber [1,2] is drawing great attention due to the flexible adjustable frequency region. Nowadays, many methods have been proposed to achieve frequency reconfigurability.…”

Section: Introductionmentioning

confidence: 99%

Comment on ``Frequency Tunable Low-Cost Microwave Absorber for Emi/Emc Application''

Zhang¹,

Ma²,

Zhang³

et al. 2018

PIER Letters

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In a recently published report, Sen and Das [5] proposed a frequency tunable low-cost microwave absorber to obtain tunable absorption spectra. In this paper, we justify that the proposed device is not an absorber. It is observed that the total absorption rates merely reach 2% and 14.85% for the air gaps of 3.5 mm and 7.5 mm, respectively, when the co-and cross-polarization reflections are taken into account in the reported device. Obviously, The original authors erroneously consider a polarization converter as an absorber, and the obvious errors can be found in their paper.

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Ultra-thin and broadband tunable metamaterial graphene absorber

Cited by 121 publications

References 24 publications

A planar miniaturized UWB dual‐polarization multiple‐input‐multiple‐output slot antenna

A planar miniaturized UWB dual‐polarization multiple‐input‐multiple‐output slot antenna

Ultrathin and Electrically Tunable Metamaterial with Nearly Perfect Absorption in Mid-Infrared

Comment on ``Frequency Tunable Low-Cost Microwave Absorber for Emi/Emc Application''

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