Linearly thermal-tunable near-infrared ultra-narrowband metamaterial perfect absorber with low power and a large modulation depth based on a four-nanorod-coupled a-silicon resonator

Zhao, Lei; Yang, Xiao; Niu, Qinglin; Zhang, He; Dong, Shen

doi:10.1364/ol.44.003885

Cited by 14 publications

(15 citation statements)

References 41 publications

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“…Recently growing interests in GST inspire many works on tunable absorbers. 24,[34][35][36][37][38][39] For example, K. V. Sreekanth et al designed and fabricated a GST-based absorber cavity with multi-narrowband perfect absorption at visible frequencies, the mechanism of tunable perfect absorption is validated using a simulation model. 38 Soon aer that, Li et al experimentally demonstrated a tunable near-infrared absorber using metal-dielectric-metal structure, where GST lm is selected as the middle layer.…”

Section: Introductionmentioning

confidence: 99%

Near-field imaging of the multi-resonant mode induced broadband tunable metamaterial absorber

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Near-field imaging of the multi-resonant mode induced broadband tunable metamaterial absorber

et al. 2020

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“…Compared with traditional light absorbers [8], the MAs possess some outstanding advantages, which are mainly embodied in ultra-thin dielectric sheet thickness, scalable structure size, and controllable resonance performance. Therefore, since the first presentation of the microwave MA in 2008 [5], various styles of MAs at spectrum ranges of visible, infrared, terahertz, and microwave have been studied [8][9][10][11]. Nevertheless, the designs of these MAs can only achieve the perfect absorption of single frequency point, i.e., the single-band absorption.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous realization of the single-band and broadband terahertz perfect absorber using one piece of metamaterial resonator

Wang

Tang

et al. 2020

SN Appl. Sci.

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A kind of terahertz metamaterial absorber, made of only an Au closed-ring resonator and a dielectric layer deposited on a continuous Au film, is presented to achieve bifunctional absorption characteristic. Unlike traditional absorbers having the single-functional absorption features of single-band or broadband, the designed device exhibits not only the single-band absorption response at frequency of 1.45 THz, but also a broadband absorption performance, which is caused by the superposition of three adjacent frequencies that are all localized at right side of the single-band absorption. Importantly, the relative absorption bandwidth of the broadband performance of the device over absorption rates of 50% and 80% can, respectively, reach 47.22% and 35.97%, which is very close to (and even exceed) the performance of previous single function of broadband absorbers that require several different lengths of metallic elements. The designed bifunctional absorber has the comprehensive advantages of the single functions of the single-band and broadband absorbers, and therefore, this work can offer an inspiring method to obtain a bifunctional absorber through using only one piece of metamaterial.

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“…[14] Zhao et al reported a linearly thermal-tunable ultra-narrowband MPA based on four-nanorod (NR)-coupled amorphous silicon with a sensitivity of 0.08 nm C À1 . [11] They revealed that the shift in the resonance wavelength from 1164 to 1172 nm proportionally increasing temperature depends on the change of the optical constants. However, the proposed design is not large-scale compatible as well as findings are numerical based.Among the aforementioned low-melting-point materials cited herein, Bi is a low-toxicity, low-cost, earth-abundant heavy element with a melting point of 271.3 C. [15] In its solid bulk state, Bi presents semimetallic properties.…”

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confidence: 99%

“…[7,8] Their operation principle lies in the thermo-optical effect of the change in the optical constants of a material with temperature, [9] which is prominent in the phase-change materials, such as GeSbTe (GST) and vanadium dioxide (VO 2 ) as well as amorphous silicon. [10][11][12] Thermally tunable MPAs need to fulfill the requirements of high sensitivity, spectrally selectivity, and low-power dissipation. This makes low-melting-point metals, such as bismuth (Bi), zinc (Zn), gallium (Ga), lead (Pb), and tin (Sn), candidates for such applications.…”

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Deep Subwavelength Light Confinement in Disordered Bismuth Nanorods as a Linearly Thermal‐Tunable Metamaterial

Soydan

Ghobadi

Yıldırım

et al. 2020

Physica Rapid Research Ltrs

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Efficient confinement and harvesting of the electromagnetic (EM) radiation is one of the most vigorously studied research areas under metamaterials, due to their vast variety of applications. [1][2][3] These attractive properties are, nevertheless, acquired by the periodic arrangement of subwavelength material dimensions and, therefore, functional optical devices require complex fabrication routes, such as electron beam lithography (EBL). Moreover, dynamic control of these optical properties is another issue that has attracted much attention in recent years. To attain the possibility of real-time tuning of the EM response of the metadevices, dynamically tunable scenarios are needed. Several techniques, such as electrical, [4] optical, [5] and thermal [6] tuning, have been proposed in the literature to realize active tunable metamaterials.The class of thermally tunable metamaterial perfect absorbers (MPAs) are emerging as promising candidates in the applications of optical modulators and infrared camouflage. [7,8] Their operation principle lies in the thermo-optical effect of the change in the optical constants of a material with temperature, [9] which is prominent in the phase-change materials, such as GeSbTe (GST) and vanadium dioxide (VO 2 ) as well as amorphous silicon. [10][11][12] Thermally tunable MPAs need to fulfill the requirements of high sensitivity, spectrally selectivity, and low-power dissipation. This makes low-melting-point metals, such as bismuth (Bi), zinc (Zn), gallium (Ga), lead (Pb), and tin (Sn), candidates for such applications. [13] Therefore, taking all of this into account, the large-scale realization of MPAs is crucial for their mass-production with high-throughput as well as repeatability. [14] Zhao et al. reported a linearly thermal-tunable ultra-narrowband MPA based on four-nanorod (NR)-coupled amorphous silicon with a sensitivity of 0.08 nm C À1 . [11] They revealed that the shift in the resonance wavelength from 1164 to 1172 nm proportionally increasing temperature depends on the change of the optical constants. However, the proposed design is not large-scale compatible as well as findings are numerical based.Among the aforementioned low-melting-point materials cited herein, Bi is a low-toxicity, low-cost, earth-abundant heavy element with a melting point of 271.3 C. [15] In its solid bulk state, Bi presents semimetallic properties. The real part of the dielectric permittivity of solid Bi from ultraviolet to near-infrared spectral ranges presents negative values. [16,17] In this spectral range, the liquid phase Bi is a Drude metal with strong losses, [18] and thus a "lossy" plasmonic material. Bi nanoparticles (NPs), embedded

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Linearly thermal-tunable near-infrared ultra-narrowband metamaterial perfect absorber with low power and a large modulation depth based on a four-nanorod-coupled a-silicon resonator

Cited by 14 publications

References 41 publications

Near-field imaging of the multi-resonant mode induced broadband tunable metamaterial absorber

Near-field imaging of the multi-resonant mode induced broadband tunable metamaterial absorber

Simultaneous realization of the single-band and broadband terahertz perfect absorber using one piece of metamaterial resonator

Deep Subwavelength Light Confinement in Disordered Bismuth Nanorods as a Linearly Thermal‐Tunable Metamaterial

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