Cascaded Graphene Frequency Selective Surface Integrated Tunable Broadband Terahertz Metamaterial Absorber

Mishra, Rishi; Sahu, Arpit; Panwar, Ravi

doi:10.1109/jphot.2019.2900402

Cited by 62 publications

(23 citation statements)

References 35 publications

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“…The graphene's conductivity can be managed by various parameters such as temperature, duration, dispersion rate, and chemical potential [58]. Several devices are suggested for complete absorption [59,[61][62][63] polarization-insensitive [64][65][66][67], broad-angle [64][65][66][67][68], tunability [69][70][71][72]. For the Terahertz area and the Microwave, others are examined.…”

Section: Graphene-based Metamaterialsmentioning

confidence: 99%

Graphene-Based Nanophotonic Devices

Pandya¹,

Sorathiya²,

Lavadiya³

2020

Recent Advances in Nanophotonics - Fundamentals and Applications

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Graphene is an ideal 2D material that breaks the fundamental properties of size and speed limits by photonics and electronics, respectively. Graphene is also an ideal material for bridging electronic and photonic devices. Graphene offers several functions of modulation, emission, signal transmission, and detection of wideband and short band infrared frequency spectrum. Graphene has improved human life in multiple ways of low-cost display devices and touchscreen structures, energy harvesting devices (solar cells), optical communication components (modulator, polarizer, detector, laser generation). There is numerous literature is available on graphene synthesis, properties, devices, and applications. However, the main interest among the scientist, researchers, and students to start with the numerical and computational process for the graphene-based nanophotonic devices. This chapter also includes the examples of graphene applications in optoelectronics devices, P-N junction diodes, photodiode structure which are fundamental devices for the solar cell and the optical modulation.

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Section: Graphene-based Metamaterialsmentioning

confidence: 99%

Graphene-Based Nanophotonic Devices

Pandya¹,

Sorathiya²,

Lavadiya³

2020

Recent Advances in Nanophotonics - Fundamentals and Applications

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“…Typical plasmonic antennas are recognized while using noble metals, such as silver and gold. The behavior of these materials at the infrared (IR) region changes because of finite electron mass in metals, which can lead to a delayed response to the incident EM field having a varying frequency [5]. Thereby, these metals act as lossy non-plasmonic conductors with the cutoff plasmon resonance frequency being oticed appropriately below the IR region, resulting in a considerable drop in metal conductivity [6].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Absorption Enhancement and Equivalent Resonant Circuit Modeling of Tunable Graphene-Metal Hybrid Antenna

Ullah

Nawi

Witjaksono³

et al. 2020

Sensors

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Plasmonic antennas are attractive optical components of the optoelectronic devices, operating in the far-infrared regime for sensing and imaging applications. However, low optical absorption hinders its potential applications, and their performance is limited due to fixed resonance frequency. In this article, a novel gate tunable graphene-metal hybrid plasmonic antenna with stacking configuration is proposed and investigated to achieve tunable performance over a broad range of frequencies with enhanced absorption characteristics. The hybrid graphene-metal antenna geometry is built up with a hexagon radiator that is supported by the Al2O3 insulator layer and graphene reflector. This stacked structure is deposited in the high resistive Si wafer substrate, and the hexagon radiator itself is a sandwich structure, which is composed of gold hexagon structure and two multilayer graphene stacks. The proposed antenna characteristics i.e., tunability of frequency, the efficiency corresponding to characteristics modes, and the tuning of absorption spectra, are evaluated by full-wave numerical simulations. Besides, the unity absorption peak that was realized through the proposed geometry is sensitive to the incident angle of TM-polarized incidence waves, which can flexibly shift the maxima of the absorption peak from 30 THz to 34 THz. Finally, an equivalent resonant circuit model for the investigated antenna based on the simulations results is designed to validate the antenna performance. Parametric analysis of the proposed antenna is carried out through altering the geometric parameters and graphene parameters in the Computer Simulation Technology (CST) studio. This clearly shows that the proposed antenna has a resonance frequency at 33 THz when the graphene sheet Fermi energy is increased to 0.3 eV by applying electrostatic gate voltage. The good agreement of the simulation and equivalent circuit model results makes the graphene-metal antenna suitable for the realization of far-infrared sensing and imaging device containing graphene antenna with enhanced performance.

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“…electronic, mechanical, and magnetic [2 ]. The absorber tunability can also be achieved using graphene by varying its chemical potential [9 ]. The microwave diodes, transistors, chip resistors, and plasma have been reported as other alternatives in the realisation of tunable absorber [2, 9–11 ].…”

Section: Introductionmentioning

confidence: 99%

“…The absorber tunability can also be achieved using graphene by varying its chemical potential [9 ]. The microwave diodes, transistors, chip resistors, and plasma have been reported as other alternatives in the realisation of tunable absorber [2, 9–11 ]. However, the simultaneous achievement of lower thickness, wide absorption bandwidth, tunable absorption characteristics, and simple bias network with low‐cost is still a very challenging task in the development of efficient absorber.…”

Section: Introductionmentioning

confidence: 99%

Microwave non‐destructive testing of active frequency selective surface embedded tunable radar absorber

2020

Self Cite

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The development and performance evaluation of a thin, broadband, and tunable radar wave absorber with reduced complexity is a strenuous task. This Letter reports the design, fabrication, and non‐destructive measurement of an active frequency selective surface (FSS) embedded tunable radar absorber. The proposed absorber design consists of periodically patterned, PIN diode mounted‐active transmissive/reflective FSS with a straightforward bias network. The tunable absorption characteristics are obtained over a wide frequency range by controlling the bias voltage of PIN diodes. The features of the proposed tunable absorber are demonstrated through non‐destructive free space, microwave measurement of a fabricated prototype. The measurement results show the achievement of a remarkable bandwidth of 3.0 GHz, which enables dynamic control of the absorption characteristics ranging from 8.2 to 12.4 GHz. Such an approach paves the way toward the realisation of smart materials and structures for electromagnetic wave manipulation.

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Cascaded Graphene Frequency Selective Surface Integrated Tunable Broadband Terahertz Metamaterial Absorber

Cited by 62 publications

References 35 publications

Graphene-Based Nanophotonic Devices

Graphene-Based Nanophotonic Devices

Dynamic Absorption Enhancement and Equivalent Resonant Circuit Modeling of Tunable Graphene-Metal Hybrid Antenna

Microwave non‐destructive testing of active frequency selective surface embedded tunable radar absorber

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