Graphene-based tunable infrared multi band absorber

Patel, Shobhit K.; Sorathiya, Vishal; Sbeah, Zen; Lavadiya, Sunil; Nguyen, Truong Khang; Dhasarathan, Vigneswaran

doi:10.1016/j.optcom.2020.126109

Cited by 41 publications

(10 citation statements)

References 48 publications

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“…The proposed multilayered structure can be fabricated exploiting the chemical vapor deposition (CVD) technique without undergoing complex lithography process. Multilayered graphene medium can be deposited over a thin layer of SiO 2 23,25,37 . A graphene medium having 1 nm thickness normally corresponds to trilayer graphene structure, which can be synthesized on a ceramic substrate by the CVD method, and then transferred on the SiO 2 layer 42 .…”

Section: Design and Analysismentioning

confidence: 99%

“…Tunable materials have been attractive in designing active metamaterials and plasmonic absorbers. The integration of tunable materials, such as graphene 17,[23][24][25] and phase changing mediums (PCMs) [26][27][28][29][30] , into the design of active metamaterials allows them to be useful in many photonic applications. Within the context, grapheneand liquid crystal-based devices are tuned by external electrical stimulus, whereas the PCMs (such as the VO 2 and G 2 Se 2 Te 5 (GST) mediums)-based devices can be tuned electrically 26 , thermally 29 , and/or optically 31,32 .…”

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confidence: 99%

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Tunable absorber embedded with GST mediums and trilayer graphene strip microheaters

Pourmand

Choudhury

Mohamed

2021

Sci Rep

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Investigation was made of the optical response of metal-dielectric stacks-based cavity structures embedded with graphene microheaters for the purpose of perfect absorption. The absorber configuration exploits the Ge2Sb2Te5 (GST) phase changing medium, and the effects of different parametric and operational conditions on the absorption spectra were explored. The refractive indices of GST layers can be manipulated by the external electrical pulses applied to microheaters. The amplitude and duration of electrical pulses define the crystallinity ratio of the used GST mediums. The results revealed achieving perfect absorption (> 99%) in the visible and infrared (IR) regimes of the electromagnetic spectrum upon incorporating two thin GST layers of different thicknesses (in the stack) in the amorphous state. The proposed configuration showed the capability of introducing independent transition state (amorphous and/or crystalline) for each GST layer—the visible regime could be extended to the IR regime, and the perfect absorption peak in the IR regime could be broadened and red-shifted. It is expected that the structure would find potential applications in active photonic devices, infrared imaging, detectors and tunable absorbers.

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Section: Design and Analysismentioning

confidence: 99%

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confidence: 99%

Tunable absorber embedded with GST mediums and trilayer graphene strip microheaters

Pourmand

Choudhury

Mohamed

2021

Sci Rep

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“…To achieve the same multiband and broadband antenna, it is helpful to cover the broader spectrum. An antenna with a low profile, a small size and broadband should be located in the front of the system to target multiple wireless communication applications [ 2 ]. One of the significant challenging parts is to design a smaller antenna, as a microstrip patch antenna is more suitable.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of a Low-Cost, Multiband and High Gain Square Tooth-Enabled Metamaterial Superstrate Microstrip Patch Antenna

et al. 2023

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The manuscript represents a novel square tooth-enabled superstrate metamaterial loaded microstrip patch antenna for the multiple frequency band operation. The proposed tooth-based metamaterial antenna provides better gain and directivity. Four antenna structures are numerically investigated for the different geometry of the patch and tooth. These proposed structures are simulated, fabricated, measured, and compared for the frequency range of 3 GHz to 9 GHz. The electrical equivalent model of the split-ring resonator is also analyzed in the manuscript. The comparative analysis of all of the proposed structures has been carried out, in terms of several bands, reflectance response, VSWR, gain and bandwidth. The results are compared with previously published works. The effects are simulated using a high-frequency structure simulator tool with the finite element method. The measured and fabricated results are compared for verification purposes. The proposed structure provides seven bands of operation and 8.57 dB of gain. It is observed that the proposed design offers the multiple frequency band operation with a good gain. The proposed tooth-based metamaterial antenna suits applications, such as the surveillance radar, satellite communication, weather monitoring and many other wireless devices.

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“…Therefore, multi-band absorbers have also been designed in GHz [20], THz [21][22][23][24][25], nearinfrared (NIR) [3,26,27], visible [28,29], far-infrared (FIR) [30], mid-infrared (MIR) [31,32], and infrared (IR) [33][34][35] ranges.…”

Section: Introductionmentioning

confidence: 99%

Cost-Effective Bull’s Eye Aperture-Style Multi-Band Metamaterial Absorber at Sub-THz Band: Design, Numerical Analysis, and Physical Interpretation

Vafapour

2022

Sensors

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Theoretical and numerical studies were conducted on plasmonic interactions at a polarization-independent semiconductor–dielectric–semiconductor (SDS) sandwiched layer design and a brief review of the basic theory model was presented. The potential of bull’s eye aperture (BEA) structures as device elements has been well recognized in multi-band structures. In addition, the sub-terahertz (THz) band (below 1 THz frequency regime) is utilized in communications and sensing applications, which are in high demand in modern technology. Therefore, we produced theoretical and numerical studies for a THz-absorbing-metasurface BEA-style design, with N-beam absorption peaks at a sub-THz band, using economical and commercially accessible materials, which have a low cost and an easy fabrication process. Furthermore, we applied the Drude model for the dielectric function of semiconductors due to its ability to describe both free-electron and bound systems simultaneously. Associated with metasurface research and applications, it is essential to facilitate metasurface designs to be of the utmost flexible properties with low cost. Through the aid of electromagnetic (EM) coupling using multiple semiconductor ring resonators (RRs), we could tune the number of absorption peaks between the 0.1 and 1.0 THz frequency regime. By increasing the number of semiconductor rings without altering all other parameters, we found a translation trend of the absorption frequencies. In addition, we validated our spectral response results using EM field distributions and surface currents. Here, we mainly discuss the source of the N-band THz absorber and the underlying physics of the multi-beam absorber designed structures. The proposed microstructure has ultra-high potentials to utilize in high-power THz sources and optical biomedical sensing and detection applications based on opto-electronics technology based on having multi-band absorption responses.

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Graphene-based tunable infrared multi band absorber

Cited by 41 publications

References 48 publications

Tunable absorber embedded with GST mediums and trilayer graphene strip microheaters

Tunable absorber embedded with GST mediums and trilayer graphene strip microheaters

Design and Fabrication of a Low-Cost, Multiband and High Gain Square Tooth-Enabled Metamaterial Superstrate Microstrip Patch Antenna

Cost-Effective Bull’s Eye Aperture-Style Multi-Band Metamaterial Absorber at Sub-THz Band: Design, Numerical Analysis, and Physical Interpretation

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