TOPAS based porous core photonic crystal fiber for terahertz chemical sensor

Chaudhary, Vijay Shanker; Kumar, Dharmendra

doi:10.1016/j.ijleo.2020.165562

Cited by 37 publications

(7 citation statements)

References 23 publications

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“…The relationship between relative sensitivity and frequency is depicted in Figure 6a. The relative sensitivity increases with decreased d1 because THz waves can interact with more analytes, so the sensitivity is relatively high [31][32][33][34][35][36][37]. As shown in Figure 6b, the decrease in d1 has an insignificant impact on EML, which is closely related to the absorption coefficient of the material because the absorption coefficient of the filled cancer cells is much higher than that of the background material.…”

Section: Influence Of Fill In Factor On Optical Fiber Performancementioning

confidence: 97%

A Novel High-Sensitivity Terahertz Microstructure Fiber Biosensor for Detecting Cancer Cells

Zhang

Miao

et al. 2022

Photonics

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Cancer is one of the leading causes of mortality worldwide. In recent years, various kinds of biosensors based on optical fiber have been proposed for detection of cancer cells due to their advantages of accurate diagnosis, small size, low cost, and flexible design parameters. In the present study, a microstructure fiber (MSF) biosensor with porous-core structures was designed to detect cancer cells using a terahertz time-domain system (TDS). The fiber characteristics of the proposed MSF were optimized by adopting a finite element numerical technique and perfectly matching layer absorption boundary conditions. The numerical results show that the proposed biosensor presented an ultrahigh sensitivity for detection of cancer cells. Under the optimal condition of 0.9 THz, the relative sensitivity of the proposed structure to breast cancer cells was as high as 99.8%. Moreover, other optical fiber parameters, such as effective material loss (EML), confinement loss (CL), numerical aperture (NA), power fraction, and effective area (Aeff), were optimal according to the reported results. The proposed structure can be easily fabricated by 3D printing and flexibly applied in the fields of biomedicine and biosensing with a terahertz (THz) waveguide.

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Section: Influence Of Fill In Factor On Optical Fiber Performancementioning

confidence: 97%

A Novel High-Sensitivity Terahertz Microstructure Fiber Biosensor for Detecting Cancer Cells

Zhang

Miao

et al. 2022

Photonics

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“…• Sensing: As the first mission, sensors may sense environmental parameters like temperature [81] and pressure [82] (non-molecular sensing), or sense and measure the concentration of certain molecules (biomarkers) in the environment (molecular sensing), such as different gases and chemicals [83], [84]. For molecular sensing, the receiving process of the sensors can be modeled by transparent, absorbing (fully or partially), and reactive receivers [50] (see Table II for different abnormality detection schemes assuming these models).…”

Section: B Sensorsmentioning

confidence: 99%

Abnormality Detection and Localization Schemes Using Molecular Communication Systems: A Survey

et al. 2023

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Abnormality detection and localization (ADL) have been studied widely in wireless sensor networks (WSNs) literature, where the sensors use electromagnetic waves for communication. Molecular communication (MC) has been introduced as an alternative approach for ADL in particular areas such as healthcare, being able to tackle the shortcomings of conventional WSNs, such as invasiveness, bioincompatibility, and high energy consumption. In this paper, we introduce a general framework for MCbased ADL, which consists of multiple tiers for sensing the abnormality and communication between different agents, including the sensors, the fusion center (FC), the gateway (GW), and the external node (e.g., a local cloud), and describe each tier and the agents in this framework. We classify and explain different abnormality recognition methods, the functional units of the sensors, and different sensor features. Further, we describe different types of interfaces required for converting the internal and external signals at the FC and GW. Moreover, we present a unified channel model for the sensing and communication links. We categorize the MC-based abnormality detection schemes based on the sensor mobility, cooperative detection, and cooperative sensing/activation. We also classify the localization approaches based on the sensor mobility and propulsion mechanisms and present a general framework for the externally-controllable localization systems. Finally, we present some challenges and future research directions to realize and develop MC-based systems for ADL. The important challenges in the MC-based systems lie in four main directions as implementation, system design, modeling, and methods, which need considerable attention from multidisciplinary perspectives.

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“…Researchers have developed a number of polymer PCF-based chemical sensors and biosensors. Vijay Shanker Chaudhary et al [ 8 ] introduced a novel porous core structure PCF in combination with TOPAS as the substrate material for detecting various chemicals, including ethanol, benzene, and water. N. Cennamo et al [ 9 ] introduced an optical chemical sensor utilizing SPR in a POF for the specific detection and analysis of trinitrotoluene (TNT) in aqueous solution, as shown in Figure 1 c. N. Ayyanar [ 10 ] proposed a new cancer sensor utilizing a dual-core photonic crystal fiber for the identification of cancer cells in cervical, breast, and basal parts, as shown in Figure 1 d.…”

Section: Introductionmentioning

confidence: 99%

A PCF Sensor Design Using Biocompatible PDMS for Biosensing

Yang,

Li,

Sun

et al. 2024

Polymers

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A novel photonic crystal fiber (PCF) sensor for refractive index detection based on polydimethylsiloxane (PDMS) is presented in this research, as well as designs for single-channel and dual-channel structures for this PDMS-PCF sensor. The proposed structures can be used to develop sensors with biocompatible polymers. The performance of the single-channel PDMS-PCF sensor was studied, and it was found that adjusting parameters such as pore diameter, lattice constant, distance between the D-shaped structure and the fiber core, and the radius of gold nanoparticles can optimize the sensor’s performance. The findings indicate that the detection range of the single-channel photonic crystal is 1.21–1.27. The maximum wavelength sensitivity is 10,000 nm/RIU with a resolution of 1×10−5 RIU, which is gained when the refractive index is set to 1.27. Based on the results of the single-channel PCF, a dual-channel PDMS-PCF sensor is designed. The refractive index detection range of the proposed sensor is 1.2–1.28. The proposed sensor has a maximum wavelength sensitivity of 13,000 nm/RIU and a maximum resolution of 7.69×10−6 RIU at a refractive index of 1.28. The designed PDMS-PCF holds tremendous potential for applications in the analysis and detection of substances in the human body in the future.

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TOPAS based porous core photonic crystal fiber for terahertz chemical sensor

Cited by 37 publications

References 23 publications

A Novel High-Sensitivity Terahertz Microstructure Fiber Biosensor for Detecting Cancer Cells

A Novel High-Sensitivity Terahertz Microstructure Fiber Biosensor for Detecting Cancer Cells

Abnormality Detection and Localization Schemes Using Molecular Communication Systems: A Survey

A PCF Sensor Design Using Biocompatible PDMS for Biosensing

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