Temperature Tunable Seven Band Terahertz Metamaterial Absorber Using Slotted Flower–Shaped Resonator on an InSb Substrate

Appasani, Bhargav

doi:10.1007/s11468-020-01329-x

Cited by 27 publications

(11 citation statements)

References 17 publications

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“…The sensitivity of the presented structure is greater than the sensitivity of the temperature tunable single band [39.45,46] and multi-band MAs [41][42]. Additionally, the used InSb substrate in this study is both physically and electrically thinner than that used for the seven band [47] and octa band [42] THz MA temperature sensors. Consequently, the proposed simple design MA can be employed in temperature sensing applications for better sensitivity in a wider frequency range.…”

Section: Temperature Sensing Performance Of the Metamaterials Absorbermentioning

confidence: 99%

A Terahertz Metamaterial Absorber-Based Temperature Sensor Having Nine Resonance Peaks

Bagci

2021

Gazi University Journal of Science

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Section: Temperature Sensing Performance Of the Metamaterials Absorbermentioning

confidence: 99%

A Terahertz Metamaterial Absorber-Based Temperature Sensor Having Nine Resonance Peaks

Bagci

2021

Gazi University Journal of Science

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“…A silicon nitride-based bio-sensor was designed to estimate the thickness of thin films having a sensitivity of 4.05 × 10 −2 GHz/nm [11]. Similarly, sensors were developed for measuring temperature in which the absorption spectra shift with the variations in the temperature [12]. Bio-sensing applications have been achieved using TMAs that provided frequency shifts as 275 GHz [13] and 3.6 GHz [14].…”

Section: Introductionmentioning

confidence: 99%

A Triple Band Highly Sensitive Refractive Index Sensor Using Terahertz Metamaterial Perfect Absorber

Banerjee¹,

Dutta²,

Jha³

et al. 2022

PIER M

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This research introduces a novel design of a metamaterial absorber having the range in terahertz, capable of sensing changes in the refractive index of the encircling medium. The layout includes adjoining rectangular patches in the form of a plus symbol along with four circular patch resonators (CPRs) on the pinnacle of a Gallium Arsenide (GaAs) substrate. The proposed design comes up with three consecutive absorption peaks, with an absorptivity of 99.0%, 99.75%, and 98.0% at three different resonant frequencies of 2.36 THz, 2.675 THz, and 2.97 THz, respectively, and a Full Width Half Maximum (FWHM) of 0.08, 0.04, and 0.05. This structure's quality factor (Q-factor) at the three resonant frequencies is 29.5, 66.8, and 59.4 together with 6.75, 17.5, and 30 as figure of merit (FoM), respectively. The proposed design offers a sensitivity of 0.54 THz/RIU, 0.7 THz/RIU, and 1.5 THz/RIU in those three absorption bands. To support the selection of design parameters, parametric assessment was done. The designed sensor can find its applications in terahertz sensing.

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“…The emerging field of artificially engineered materials, known as metamaterials, has attracted much attention in the last years for potential use in thermophotovoltaic systems (TPVS) and solar thermal approach [9][10][11][12][13][14]. By demonstrating interesting electromagnetic properties not found in naturally occurring materials, the metamaterial solar absorbers (MSA) have opened a new avenue for solar energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, ideal MSA should present several bands of the spectral absorption. For instance, Bhargav Appasani proposed in [12] a seven-band metamaterial absorber with slotted flower-shaped resonator (S-FSR) on InSb dielectric substrate. Additionally, a metamaterial absorber with three absorption peaks at the terahertz regime is investigated in [16].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, a metamaterial absorber based on local surface plasmon resonance excited between molybdenum disulfide (MoS 2 ) and tungsten (W) elliptical arrays is proposed in [17]. Meanwhile, in addition to these exciting electromagnetic properties, metamaterial absorbers exhibit other salient properties as performances shifting by using external stimuli as gravity field regulation, temperature, and voltage [12,18]. Metamaterials found also applications in other fields as biomedical for sensing both the temperature and the refractive index [19].…”

Section: Introductionmentioning

confidence: 99%

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Broadband Metamaterial Solar Absorbers Based on the Earth First-Rate Temperature-Insensitivity Metals for High Temperature Energy Harvesting

Ouabida

2022

Preprint

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Artificially engineered solar absorbers, known as metamaterial solar absorbers (MSA), are yielding new opportunities for designing new photons management systems. Further, the noble metals are indispensable in creating MSA owing to their plasmonic resonance in a desired spectral region. Nevertheless, in high temperature applications, the noble metals suffer from low melting points that make their uses largely impractical. In this work, the solution of using four of the Earth first-rate temperature-insensitivity metals in a proposed MSA is investigated. The proposed MSA structure is composed of high melting point metals (HMPM), deposited on a magnesium fluoride (MgF 2 ) dielectric spacer and a tungsten continuous plate. Meanwhile, owing to the dependence of MSA properties on structural parameters rather than band structure or chemistry, a geometrical optimization of the proposed absorbers is reported. Furthermore, the proposed MSA performance is investigated by computing the absorption spectrums. Results show relatively long bandwidths in the visible and near-infrared regimes. Besides, an underlying mechanism of the absorption enhancement with the corresponding electromagnetic field distributions are elucidated in detail. The calculated results indicate that the proposed MSA present wide bandwidths owing to the excitation of resonance modes of surface plasmons, dipolar interactions and cavity modes. Equally important, absorption measurements under wide polarization angles show polarization-insensitive high absorption at higher wavelengths, which is among the most important factors for an ideal solar absorber. The conclusion of this investigation is undoubtedly important, specifically that the proposed HMPM-based MSA would be the best choice for energy harvesting in high temperature applications.

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Temperature Tunable Seven Band Terahertz Metamaterial Absorber Using Slotted Flower–Shaped Resonator on an InSb Substrate

Cited by 27 publications

References 17 publications

A Terahertz Metamaterial Absorber-Based Temperature Sensor Having Nine Resonance Peaks

A Terahertz Metamaterial Absorber-Based Temperature Sensor Having Nine Resonance Peaks

A Triple Band Highly Sensitive Refractive Index Sensor Using Terahertz Metamaterial Perfect Absorber

Broadband Metamaterial Solar Absorbers Based on the Earth First-Rate Temperature-Insensitivity Metals for High Temperature Energy Harvesting

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