Metamaterial-based imaging for potential security applications

Shrekenhamer, David; Watts, Claire M.; Montoya, John; Krishna, S.; Padilla, Willie J.

doi:10.1117/12.2013145

Cited by 8 publications

(7 citation statements)

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“…Because of the remarkable electromagnetic properties of various metamaterials, the design and use of metamaterial have picked up the need of fiery research [ 7 ]. However, Metamaterials are likewise being broadly considered for various applications, for example, perfect absorbers from mm to nm wavelengths [ 8 ], flexible metamaterials [ 9 ], multiband metamaterials [ 10 ] polarization insensitive absorber [ 11 ], broadband absorber [ 12 ], multiband absorber [ 13 ], and detectors [ 14 ], and Sensors [ 15 ]. There are numerous examinations that research PMAs.…”

Section: Introductionmentioning

confidence: 99%

Perfect metamaterial absorber with high fractional bandwidth for solar energy harvesting

2018

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A new perfect metamaterial absorber (PMA) with high fractional bandwidth (FBW) is examined and verified for solar energy harvesting. Solar cells based on perfect metamaterial give a chance to increase the efficiency of the system by intensifying the solar electromagnetic wave that incident on the device. The designed structure is mostly offered in the visible frequency range so as to exploit the solar’s energy efficiently. Parametric investigations with regard to the measurements of the design structure are fulfilled to characterize the absorber. The finite-difference time-domain (FDTD) method-based CST simulator was used to keep the pattern parameters and absorbance analysis. The metamaterial shows almost 99.96% and 99.60% perfect absorption at 523.84 THz and 674.12 THz resonance frequencies. Moreover, absorption’s FBW is studied, and 39.22% FBW is found. The results confirm that the designed PMA can attain very high absorption peak at two modes such as transverse electric (TE) and transverse magnetic (TM) mode. Other than the numerical outcomes demonstrated that the suggested configuration was also polarization angle insensitive. In addition, the change of absorbance of the structure has provided a new kind of sensor applications in these frequency ranges. Therefore, the suggested metamaterial absorber offers perfect absorption for visible frequency ranges and can be used for renewable solar energy harvesting applications.

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Section: Introductionmentioning

confidence: 99%

Perfect metamaterial absorber with high fractional bandwidth for solar energy harvesting

2018

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“…Due to the unconventional electromagnetic properties of numerous metamaterials, namely the (-) ve permittivity, (-) ve permeability, (-) ve refractive index, and invisibility, the design and application of MMs has gained the priority of vigorous research [1,2]. Nevertheless, MMs are also being extensively studied for different applications, for instance, perfect absorbers through the wide electromagnetic spectrum from millimetre to nanometre wavelengths [3,4], multiband absorber [5], polarization insensitive absorber [6], imagers and detectors [7,8], and broad band absorber [9], smart antenna, and beam shaping devices [10,11]. A 24 × 24 mm 2 Jerusalem cross with meandered load absorber depicts absorptions of more than 95% at 14.75 GHz and 16.1 GHz [12].…”

Section: Introductionmentioning

confidence: 99%

A New Compact Octagonal Shape Perfect Metamaterial Absorber for Microwave Applications

et al. 2017

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Abstract:A new compact octagonal shape perfect metamaterial absorber (PMA) design, numerical simulation, fabrication, and investigational verification of unit cell that is based on a simple structure are presented in this paper. The suggested structure comprised of three layers, in which interact to produce the plasmonic resonances. The finite-integration technique (FIT) based Computer Simulation Technology (CST) microwave electromagnetic simulator was utilized to examine the design parameters and conduct absorption analysis. The design structure exhibited peak absorption values as 99.64% and 99.95% at frequencies 8.08 GHz and 11.41 GHz, respectively. The absorption characteristics were analysed using the polarization angle of the structure, layer thickness, PMA with resistive load, and number of rings. An N5227A vector network analyser was used for the measurement. The measured results of the fabricated prototype were in good agreement with the simulation results. The suggested perfect absorber structure enables innumerable application aimed at X-band for applications like, defence, security, and stealth technology.

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“…Metamaterials (MMs) have been considered as a route of engineering the electromagnetic response of micro-and nanostructured materials through resonance excitations [1]. MMs have many remarkable applications, including super lensing [2], negative refractive index [3], cloaking [4] and perfect absorption [5], in security [6,7], chemical and biology sensing [8], and information processing [9].…”

Section: Introductionmentioning

confidence: 99%