THz Dielectric Metamaterial Sensor With High Q for Biosensing Applications

Upender, Patri; Kumar, Amarjit

doi:10.1109/jsen.2023.3239669

Cited by 19 publications

(9 citation statements)

References 49 publications

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“…The THz sensors can be categorized into several types. The first type is the refractive index sensor, which infers the refractive index of the analyte attached to the sensor surface based on the change of the sensor’s resonant frequency. − The second type is the biosensor, capable of detecting DNA short sequences, thrombin, carcinoembryonic antigen (CEA) biomarkers, glucose, − microorganisms, and corneal tissues, ensuring food security, and identifying viruses , and cancer cells, , while some other biosensors have been achieved through on-chip design. , Furthermore, the pesticide sensor is also a hot topic, aiming to detect pesticide concentration through variations in resonant peaks (frequency or amplitude shifts). Some recent works have focused on detecting pesticides like 2,4-dichlorophenoxyacetic acid (2,4-D), chlorpyrifos-methyl, and phosalone. − In addition, other types of THz sensors include temperature metamaterial sensors for low-loss amplitude modulators and temperature-controlled THz devices, − as well as photonic sensors for ultrafast all-optical switching and precise label-free immunosensing. , …”

Section: Introductionmentioning

confidence: 99%

A Flexible Terahertz Metamaterial Sensor for Pesticide Sensing and Detection

Wang,

Luo,

2024

ACS Appl. Mater. Interfaces

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Terahertz (THz) waves have garnered significant interest across various fields, particularly in high-sensitivity sensing applications. Metamaterials can be employed in THz sensors, specifically for refractive index sensing and pesticide detection due to their highsensitivity characteristics. In this Article, a dual-band flexible THz metamaterial sensor based on polyimide is proposed for refractive index and pesticide sensing, which is fabricated using ultraviolet (UV) lithography technology and measured by a THz time-domain spectroscope (TDS) system. The resonant frequencies of the sensor are at 0.37 and 1.13 THz, with transmission rates of 2.9% and 0.3%, respectively. With an analyte layer attached to the sensor's surface, the sensitivity of refractive index sensing can be calculated as 0.09 and 0.28 THz/RIU (refractive index unit) at the two resonant frequencies. In order to validate the exceptional pesticide sensing performance of the sensor, chlorpyrifos-methyl acetone solutions with various concentrations are added on it. Furthermore, a monolayer of graphene is coated on the sensor's surface, which is proved capable of improving pesticide sensing sensitivity at low concentrations due to strong π−π stacking interactions with π-electrons in chlorpyrifos-methyl solutions. Therefore, the graphene-coated sensor can be utilized in detecting pesticide solutions with low concentrations, and the sensor without graphene is preferred for high concentration detection. This work provides a novel option for the THz metamaterial sensor with high sensitivity covering a wide pesticide concentration range.

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Section: Introductionmentioning

confidence: 99%

A Flexible Terahertz Metamaterial Sensor for Pesticide Sensing and Detection

Wang,

Luo,

2024

ACS Appl. Mater. Interfaces

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“…The terahertz (THZ), the next corridor for serving multiple applications including sensing, imaging, energy harvesting, thermal storage, and communication is being investigated [1][2][3]. The implementation of different THz devices like antennas [4,5], filter [6], modulator [7], absorbers [8,9] and sensors [7,8] is on the way to fulfill the future requirements. The recent advancements in the domain of micro/nanoscale devices are based on the implementation of metamaterial and frequency selective absorbing cells [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The metamaterials are artificial materials made up of special sequencing of similar resonating structures that can provide the negative values of the permittivity and permeability which is not possible with the natural materials [12]. Recently, the implementation of ultrathin, ultrasensitive absorption based sensors/biosensors with a narrow and ultranarrowband response is numerically studied [9,[13][14][15]. Metals, dielectrics, and 2D materials have been investigated for the development of the THz metamaterials [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Absorption enhancement in silicon-based dielectric resonator for quad-band terahertz biosensing

Gupta,

Maurya

2024

Phys. Scr.

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A technique is implemented to obtain the multi-band perfect absorption (nearly 100%) in an ultrathin silicon-based dielectric resonator (DR) using perturbation. A silicon-based plus-shaped resonator is utilized to design the proposed absorber which provides the four narrow-band absorptions at frequencies of around 5.75, 6.14, 6.48, and 7.24 THz with the level of absorption 54%, 20%, 95%, and 96%, respectively. The plus-shaped resonator is perturbedby cutting slot of plus shape in such a way that it obtains perfect absorption with sufficient guard-band to prevent the multi-band interference in each band. This perturbation provides four absorption peaks at frequencies of around 5.80, 6.27, 6.80, and 7.23 THz, with highly improved absorption in all the bands, i.e., 99.84%, 99.78%, 99.51%, 98.42%, respectively. The ultranarrow absorption peaks with narrow FWHM are suitable for the application of THz biosensing and refractive index analysis. The performance of the proposed absorber is studied with the variation in refractive index of sample. It is found that the proposed absorber provides the high sensitivity 0.186, 0.29, 0.2485, 0.43 THz/RIU and quality factor 280, 185.79, 320.42, and 131.51 for different bands, respectively. The proposed absorber performance is also studied for various THz biosensing applications like the detection of various viruses, malaria, and cancer in the human body at various stages.

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“…Metamaterial-based energy harvesting structures have also garnered significant attention from researchers due to their unique properties. The ability to engineer a metasurface and metamaterial surface with negative permeability and permittivity has opened up novel applications in various frequency bands, including energy harvesting [ 29 ], perfect lensing [ 30 ], and perfect absorption [ 31 ]. For instance, the metamaterial’s integration in the antenna design in [ 32 ] leads to a significant enhancement in the antenna’s gain across all frequency bands.…”

Section: Introductionmentioning

confidence: 99%

A High-Performance Circularly Polarized and Harmonic Rejection Rectenna for Electromagnetic Energy Harvesting

Abdulwali,

Alqahtani,

Aladadi

et al. 2023

Sensors

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This paper presents a novel circularly polarized rectenna designed for efficient electromagnetic energy harvesting at the 2.45 GHz ISM band. A compact antenna structure is designed to achieve high performance in terms of radiation efficiency, axial ratio, directivity, effective area, and harmonic rejection over the entire bandwidth of the ISM frequency band. The optimized rectifier circuit enhances the RF harvested energy efficiency, with an AC-to-DC conversion efficiency ranging from 36% to 70% for low-level input power ranging from −10 dBm to 0 dBm. The stable output of DC power confirms the suitability of this design for various practical applications, including wireless sensor networks, energy harvesting power supplies, medical implants, and environmental monitoring systems. Experimental validation, which includes both the reflection coefficient and radiation patterns of the designed antenna, confirms the accuracy of the simulation. The study found that the proposed energy harvesting system has a high total efficiency ranging from 53% to 63% and is well-suited for low-power energy harvesting (0 dBm) from ambient electromagnetic radiation. The proposed circularly polarized rectenna is a competitive option for efficient electromagnetic energy harvesting, both as a standalone unit and in an array, due to its high performance, feasibility, and versatility in meeting various energy harvesting requirements. This makes it a promising and cost-effective solution for various wireless communication applications, offering great potential for efficient energy harvesting from ambient electromagnetic radiation.

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THz Dielectric Metamaterial Sensor With High Q for Biosensing Applications

Cited by 19 publications

References 49 publications

A Flexible Terahertz Metamaterial Sensor for Pesticide Sensing and Detection

A Flexible Terahertz Metamaterial Sensor for Pesticide Sensing and Detection

Absorption enhancement in silicon-based dielectric resonator for quad-band terahertz biosensing

A High-Performance Circularly Polarized and Harmonic Rejection Rectenna for Electromagnetic Energy Harvesting

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