Designing and Analysis of Ultrathin Metamaterial Absorber for W Band Biomedical Sensing Application

Singh, Harbinder; Gupta, Amit; Kaler, R.S.; Singh, Shreya; Gill, Amoljit Singh

doi:10.1109/jsen.2022.3168827

Cited by 33 publications

(5 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

A Flexible Terahertz Metamaterial Sensor for Pesticide Sensing and Detection

Wang,

Luo,

2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…37 It is very necessary to study the sensing characteristics of terahertz metamaterial absorbers for further applications in sensors or sensing systems. Simulations [38][39][40] and measurements 41 are carried out to determine the refractive index sensitivity. In some recently works, the sensing properties of sensors are studied by means of several solutions with different concentrations, such as glucose, 42 chlorpyrifos (CPS), and 2,4-dichlorophenoxyacetic acid (2,4-D).…”

Section: Introductionmentioning

confidence: 99%

A high Q-factor dual-band terahertz metamaterial absorber and its sensing characteristics

Wang

Luo

et al. 2023

Nanoscale

View full text Add to dashboard Cite

show abstract

“…Giessen et al [25] were the first to use a single-band absorber to sense different concentrations of hydrogen. Later, more sensors for different purposes were proposed, such as sensing temperature [26][27][28], material thickness [29][30][31], and material refractive index [32][33][34]. In recent studies, metamaterial absorbers for sensing refractive index incorporated graphene, making sensors even more outstanding.…”

Section: Introductionmentioning

confidence: 99%

Graphene metasurface for broadband absorption and terahertz sensing

Ren

Zhao

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

A plasmon-induced terahertz metamaterial absorber is proposed. The bottom ground layer uses gold to block the transmission of terahertz incident waves, and the pattern layer and the ground layer are separated by topas. The 90% absorption bandwidth frequency range of the absorber is 4.6-7.7THz, and the average absorption rate in this range is 97.6%. Due to the geometric symmetry of the absorber, it has polarization insensitivity. In addition, when the incidence Angle reaches 60 degrees, more than 80% absorption can still be maintained. The numerical simulation shows that the frequency shift of the absorber has a good linear relationship with the change of the refractive index of the proposed absorber, and the sensitivity is 1100GHz per refractive index unit (GHz/RIU). Therefore, the absorber can be used in more complex electromagnetic scenarios, or as a sensing element.

show abstract

Designing and Analysis of Ultrathin Metamaterial Absorber for W Band Biomedical Sensing Application

Cited by 33 publications

References 31 publications

A Flexible Terahertz Metamaterial Sensor for Pesticide Sensing and Detection

A Flexible Terahertz Metamaterial Sensor for Pesticide Sensing and Detection

A high Q-factor dual-band terahertz metamaterial absorber and its sensing characteristics

Graphene metasurface for broadband absorption and terahertz sensing

Contact Info

Product

Resources

About