Active graphene metamaterial absorber for terahertz absorption bandwidth, intensity and frequency control

He, Xiaodong; Yao, Yuan; Zhu, Zhi-Han; Chen, Minghua; Zhu, Lei; Yang, Wenlong; Yang, Yuqiang; Wu, Fengmin; Jiang, Jiuxing

doi:10.1364/ome.8.001031

Cited by 44 publications

(18 citation statements)

References 53 publications

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“…Especially, good frequency reconfiguration characteristics were clearly observed. As μ c increased from 0.3 to 0.6 eV, the over 90% absorbance peak frequency varied from 6.85 to 9.85 THz, demonstrating a wide absolute frequency tuning range of 3 THz with the RFTR of 43.8%, which was larger than the recently reported works [ 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Figure 4 b,c display the simulated absorbance spectra as a function of incidence angle and operating frequency with μ c of 0.3 and 0.6 eV, for the first and the last absorption bands with over 90% peak absorbance, respectively.…”

Section: Resultscontrasting

confidence: 59%

“…Wu investigated a tunable absorber using a dielectric grating-graphene-Bragg grating structure with an RFTR of 1.1% from 8.92 to 9.02 THz [ 23 ]. He et al presented an active graphene-based terahertz MA with an RFTR of 20.6% from 1.31 to 1.58 THz [ 24 ]. Zhang et al proposed a graphene-based tunable MA with an RFTR of 14.9% from 0.94 to 1.08 THz [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Frequency-Reconfigurable Wide-Angle Terahertz Absorbers Using Single- and Double-Layer Decussate Graphene Ribbon Arrays

Zeng

Zhang

et al. 2018

Nanomaterials

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We propose and numerically demonstrate two novel terahertz absorbers made up of periodic single- and double-layer decussate graphene ribbon arrays. The simulated results show that the proposed absorbers have narrowband near-unity terahertz absorption with ultra-wide frequency reconfiguration and angular stability. By tuning the Fermi level of graphene ribbons, the over 90% absorbance peak frequency of the absorber with single-layer graphene structure can be flexibly adjusted from 6.85 to 9.85 THz for both the transverse magnetic (TM) and transverse electric (TE) polarizations. This absorber with single-layer graphene demonstrates excellent angular stability with the absorbance peaks of the reconfigurable absorption bands remaining over 99.8% in a wide angle of incidence ranging from 0 to 70°. The tuning frequency can be significantly enhanced by using the absorber with double-layer graphene structure from 5.50 to 11.28 THz and 5.62 to 10.65 THz, approaching two octaves under TM and TE polarizations, respectively. The absorbance peaks of the reconfigurable absorption band of this absorber for both polarizations maintain over 70%, even at a large angle of incidence up to 70°. Furthermore, an analytical fitting model is also proposed to accurately predict the absorbance peak frequencies for this variety of absorbers. Benefitting from these attractive properties, the proposed absorber may have great potential applications in tunable terahertz trapping, detecting, sensing, and various terahertz optoelectronic devices.

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Section: Resultscontrasting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Frequency-Reconfigurable Wide-Angle Terahertz Absorbers Using Single- and Double-Layer Decussate Graphene Ribbon Arrays

Zeng

Zhang

et al. 2018

Nanomaterials

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“…The optimal absorber exhibited an absorptivity of larger than 90% in the frequency range of 0.5–1.5 THz, based on the simulated results. Another study proposed a graphene metamaterial absorber with a patterned top layer, of which the unit cell was composed of two graphene discs of identical size . However, these proposed metamaterial absorbers still face difficulties in their overall structure design and high precision manufacturing for large‐scale production.…”

Section: Graphene‐based Materials For Terahertz Absorptionmentioning

confidence: 99%

Graphene‐Based Materials toward Microwave and Terahertz Absorbing Stealth Technologies

Chen

Huang

et al. 2019

Advanced Optical Materials

236

102

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Electromagnetic wave absorbing materials play an increasingly important role in consumer electronics and military defense. The remarkable merits of atomically thin graphene structures and their exotic optoelectronic properties provide new opportunities to design high‐performance electromagnetic wave absorbers. This progress report summarizes the recent advances in graphene‐based microwave and terahertz stealth materials. In the first section, the theory of electromagnetic wave absorption and the evaluation methods for absorption performance are briefly introduced. Then, representative graphene‐based microwave and terahertz absorber systems are presented with an emphasis on the selection of the absorbent component and structural design. In the last section, the perspectives and future research directions of this promising field are discussed.

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“…Из-за большого коэффициента замедления ППП резонансные размеры этого элемента много меньше длины волны в вакууме. Этот эффект используется в ряде ТHz устройств, в том числе поглощающих метаповерхностях [5][6][7][8][9][10][11][12]. Обычно они являются однопериодическими структурами, образованными графеновыми лентами, и содержат поглощающие слои, например металлические пленки.…”

unclassified

Поляризационные Эффекты И Резонансное Поглощение При Дифракции Терагерцовых Волн На Графеновых Метаповерхностях

Лерер¹,

Макеева²

2018

Журнал Технической Физики

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Тремя электродинамическими методами решена задача дифракции электромагнитных волн на графеновых метаповерхностях -2D-периодических решетках прямоугольных графеновых нанолент, расположенных на подложках, содержащих диэлектрические и графеновые слои. Исследованы зависимости от частоты коэффициента прохождения через ТHz поляризаторы на основе графеновых метаповерхностей при изменении угла ориентации векторов падающей ТЕМ-волны к нанолентам графена для различных значений химического потенциала. Показано, что на частотах резонанса поверхностного плазмон-поляритона графеновые метаповерхности на многослойных подложках являются электрически управляемыми поглотителями почти 100% падающей на них энергии в ТHz диапазоне частот.

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Active graphene metamaterial absorber for terahertz absorption bandwidth, intensity and frequency control

Cited by 44 publications

References 53 publications

Frequency-Reconfigurable Wide-Angle Terahertz Absorbers Using Single- and Double-Layer Decussate Graphene Ribbon Arrays

Frequency-Reconfigurable Wide-Angle Terahertz Absorbers Using Single- and Double-Layer Decussate Graphene Ribbon Arrays

Graphene‐Based Materials toward Microwave and Terahertz Absorbing Stealth Technologies

Поляризационные Эффекты И Резонансное Поглощение При Дифракции Терагерцовых Волн На Графеновых Метаповерхностях

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