Multi-layered graphene silica-metasurface based infrared polarizer structure

Sorathiya, Vishal; Patel, Shobhit K.; Ahmed, Kawsar; Taya, Sofyan A.; Das, Sudipta; Krishna, Ch Murali

doi:10.1007/s11082-022-03551-9

Cited by 7 publications

(4 citation statements)

References 64 publications

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“…Thus, making it suitable for variety of applications. They have been widely studied in the field of optics and have been used to create a wide range of functional devices such as waveplates [1][2][3], polarizers [4][5][6][7][8], and beam shapers [9][10][11][12][13]. One of the key advantages of metasurfaces is that they can be used to create highly compact and lightweight devices that can be integrated into a wide range of systems.…”

Section: Intorductionmentioning

confidence: 99%

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

Khan,

Mairaj Rasool Khan

2024

PLoS ONE

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In this reported work a single feed, miniaturized, dual layer, and low profile antenna is presented for 1.575GHz frequency band. The proposed antenna offers high gain, lower noise bandwidth, with better sensitivity and range. The ground choke technique is used for back lobe suppression. The prototype is fabricated on FR 4 substrate using manual fabrication technique. This offers an inexpensive and readily available fabrication. Therefore, fabricated antenna is small size, low cost, easily fabricated and tested for satellite communication. The antenna comprises of two layers, containing a patch radiator and a Metasurface layer with 3x3 rectangular ring resonators. The layers are separated using foam with a 12mm width. The proposed prototype is radiating at 1.575GHz and 2.33GHz with an overall dimension of 85.6 x 68.4 x 15.204 mm. The developed antenna provides a gain of 5.9 dBi. The simulated results are verified using VNA and anechoic chamber testing. Moreover, the developed antenna has been successfully tested for L-Band Satellite communication in real time scenario without any LNA. Higher Gain due to Metasurface increase the efficiency of the system. The promising results indicate the aptness of the developed antenna for real-world applications of L-Band and S-Band.

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Section: Intorductionmentioning

confidence: 99%

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

Khan,

Mairaj Rasool Khan

2024

PLoS ONE

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“…This control is crucial for tailoring the sensor's sensitivity. Si prevents direct contact between the metal layers, reducing the risk of unwanted electrical interactions and ensuring the sensor's reliability [28][29][30]. The Jerusalem-shaped resonator made of silver can support localized surface plasmon resonances (LSPRs) in the terahertz range.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive Borophene-metal-Si based multilayered Terahertz frequency spectrum based refractive index sensor

Almawgani,

Sorathiya,

Soni

et al. 2024

Phys. Scr.

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We presented the numerical investigation of a multilayered borophne-metal-Si-based refractive index sensor for the wide range of the THz frequency. The proposed structure is worked for the frequency range of 1 to 15 THz. The structure is formed to identify reflectance variation, resonating frequency and other physical parameters over the broad frequency spectrum. The overall structure is simulated using FEM (Finite element method) computational techniques with a periodic boundary condition-based two-port model. The resonance effect of the structure is also investigated for the different shapes of the top metal resonator structure, which significantly influences the overall frequency shift. The proposed structure is investigated for the X and Y polarized input incident condition for the entire frequency band where the oblique angle incident stability is observed up to 80⁰. The proposed structure offers the maximum variation in sensitivity up to 3.5 THz/RIU (~ 11600 nm/RIU) for X-polarized and 5.5 THz/RIU (~ 10600 nm/RIU) for Y-polarized incident wave conditions. We have applied the artificial neural network algorithm (ANN) to predict the overall behaviour of the structure from the data points generated in the simulated results. We used the Relu optimizer to train the model, generating promising results for our collected data. The machine learning model gives RMSE = 0.049422, MAE = 0.018531, MSE = 0.00328 and R2 = 0.93768 for the testing data set. Similarly, the model generated the minimum RMSE values = 0.045955, MAE = 0.017392, MSE = 0.00295, and R2 = 0.97673 for the training data set for 2500 epochs. The proposed results in the manuscript give the future scope to design borophene a wide range of refractive index (RI) sensor designs used in biosensors, gas sensors and other environment sensors where the refractive index range is between 1 and 2.4.

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“…Some tests are available to detect the existence of coronavirus in the human body namely RT_PCR, real-time RT-LAMP, and reverse transcription loop-mediated isothermal amplification (RT-PCR) (Shirato et al 2018 ; Yan et al 2020 ). However SARS-CoV-2 antigen fast test kit that is used for the detection of COVID-19 is less sensitive in comparison to RT-PCR (Mak et al 2020 ; Krüttgen et al 2021 ) and results are confirmed after CT-scan chest computed tomography (Korevaar et al 2020 ; Chen et al 2020 ). Biosensors had already proved their potential for deadly diseases like cancer, tuberculosis, and dengue.…”

Section: Introductionmentioning

confidence: 99%

Refractive index based optically transparent biosensor device design for early detection of coronavirus

Balamurugan

Parvin

Alsalem³

et al. 2023

Opt Quant Electron

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For the quick detection of the new Coronavirus (COVID-19), a highly sensitive D-shaped gold-coated surface Plasmon resonance (SPR) biosensor is presented. The COVID-19 virus may be quickly and accurately identified using the SPR-based biosensor, which is essential for halting the spread of this excruciating epidemic. The suggested biosensor is used for detection of the IBV i.e. infectious bronchitis viruses contaminated cell that belongs to the family of COVID-19 having a refractive index of − 0.96, − 0.97, − 0.98, − 0.99, − 1 that is observed with the change in EID concentration. Some important optical parameter variations are examined in the investigation process. Multiphysics version 5.3 with the Finite element method is used for the proposed biosensor. The proposed sensor depicts maximum wavelength sensitivity of 40,141.76 nm/RIU. Some other parameters such as confinement loss, crosstalk, and insertion loss are also analyzed for the proposed sensor. The reported minimum insertion loss for the refractive index (RI) − 1 is 2.9 dB. Simple design, good sensitivity, and lower value of losses make the proposed sensor proficient for the detection of infectious bronchitis viruses belonging to COVID-19. Graphical abstract

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Multi-layered graphene silica-metasurface based infrared polarizer structure

Cited by 7 publications

References 64 publications

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

Highly sensitive Borophene-metal-Si based multilayered Terahertz frequency spectrum based refractive index sensor

Refractive index based optically transparent biosensor device design for early detection of coronavirus

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