Multiband Metamaterial absorber with absorption prediction by assisted machine learning

Jain, P. L.; Chhabra, Himanshu; Chauhan, Urvashi; Singh, Dhiraj Kumar; Anwer, Twana Mohammed Kak; Ahammad, Shaik Hasane; Hossain, Md. Amzad; Rashed, Ahmed Nabih Zaki

doi:10.1016/j.matchemphys.2023.128180

Cited by 25 publications

(6 citation statements)

References 37 publications

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“…This can be a suitable solution for regression problems with inadequate data because it is less prone to overfitting than single decision trees [38] [39]. Extra trees are a random forest variant that employs a more randomized technique to train individual trees [40]. This has the potential to improve forecast accuracy, particularly in high-dimensional datasets [6] [41].…”

Section: B Bagging-based Ensemble Modelsmentioning

confidence: 99%

Machine Learning Techniques for Predicting Metamaterial Microwave Absorption Performance: A Comparison

Jain,

Chhabra,

Chauhan

et al. 2023

IEEE Access

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Section: B Bagging-based Ensemble Modelsmentioning

confidence: 99%

Machine Learning Techniques for Predicting Metamaterial Microwave Absorption Performance: A Comparison

Jain,

Chhabra,

Chauhan

et al. 2023

IEEE Access

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“…Due to the longer wavelengths of terahertz waves, traditional optical devices 6 often tend to be bulky and complex. However, metasurfaces enable compact and integrated designs, 7 – 9 simplifying terahertz device structure and fabrication process.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional terahertz metasurface switch based on nematic liquid crystals for cross-spectrum applications

Deng,

Kou,

Zhang

et al. 2024

Opt. Eng.

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We present a design of a fully electrically tunable metasurface switch based on nematic liquid crystal (LC). By applying different voltages on adjacent gratings of the interdigitated electrodes, the dielectric constant of the LC material and the responses of the proposed metasurface can be arbitrarily tuned. The experimental results reveal a reflective switch action in the structure across a frequency range of 106.80 to 114.15 GHz. The maximum operational frequency bandwidth is 7%, and the highest switch contrast ratio achieved is 0.77. Moreover, the suggested structure demonstrates multifunctional switching capability, manifesting a transmissive switching effect in the frequency range of 340.75 to 345.13 GHz. The measured switch contrast ratio reaches a maximum of 0.71. Combining the advantages of multifunctionality and cross-spectrum application, we provide an innovative approach for developing switches intended for terahertz wave communication systems.

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“…10 Compared with the traditional absorber, the absorber based on metasurface has the characteristics of strong absorption, thin thickness, and light weight. Since Landy et al 11 designed a metasurface-based open ring perfect absorber in 2008, various types of absorbers have come into being, such as narrowband absorption, 12 broadband absorption, 13 and multiband absorption. 14 However, with the development of metasurfaces in recent years, a new problem has arisen: once the metamaterial is designed, its performance cannot be changed, and it is easy to waste resources.…”

Section: Introductionmentioning

confidence: 99%

Switchable multifunctional metasurface with broadband absorption and polarization conversion in the terahertz frequency band

Wang,

Chen,

Chu

et al. 2023

Opt. Eng.

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A switching multifunctional metasurface with wideband absorption, cross-polarization conversion, and wideband line-to-circle in the terahertz frequency band is designed based on the phase transition characteristic of vanadium dioxide (VO 2 ). The simulation results show that when the VO 2 is in the metallic state, the structure has the function of broadband absorption; the absorption rate reaches more than 90% in the range of 3.32 to 8.04 THz, and it has the characteristics of wide-angle incidence and polarization insensitivity. When the VO 2 is in the insulated state, the designed metasurface can realize cross-polarization conversion and broadband line to circular polarization conversion. The linear polarization of 1.85 to 2.76 THz is transformed into cross-polarization, the polarization conversion efficiency is >90%, and the ellipticity is >90% for 1.61 to 1.75 THz and 3.06 to 8.37 THz ranges, which can convert line polarization to circular polarization and maintain good efficiency in the polarization conversion function within acceptable incidence and polarization angles. The proposed optical metasurface has great potential in terahertz fields, such as stealth technology, polarization conversion, and radar communication.

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Multiband Metamaterial absorber with absorption prediction by assisted machine learning

Cited by 25 publications

References 37 publications

Machine Learning Techniques for Predicting Metamaterial Microwave Absorption Performance: A Comparison

Machine Learning Techniques for Predicting Metamaterial Microwave Absorption Performance: A Comparison

Multifunctional terahertz metasurface switch based on nematic liquid crystals for cross-spectrum applications

Switchable multifunctional metasurface with broadband absorption and polarization conversion in the terahertz frequency band

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