Recent Advances in the Development of Materials for Terahertz Metamaterial Sensing

Advanced Optical Materials, Journal Year: 2021, Volume and Issue: 10(1)

Published: Oct. 17, 2021

Abstract Terahertz metamaterial sensing (TMS) is a new interdisciplinary technology. A TMS system employs terahertz waves as the pumping source, these then interact with sample and carry substance information, e.g., refractive index, absorption spectra. These properties are relevant to molecular rotation vibration states produced by surface‐plasmon‐polariton‐like effect. technology usually characterized large penetration depth high sensitivity. Owing advantages, may be used for ultratrace detection consequently has wide range of practical applications in biomedicine, food safety, environmental monitoring, industry agriculture, material characterization, safety inspection. Furthermore, performance determined not only structural topology metamaterials, but also their compositions substrates. This paper reviews essential fundamentals, applications, recent advances focus on influence selection performance. review envisaged key reference developing TMS‐based functional devices enhanced characteristics.

Language: Английский

---

Terahertz ultrasensitive biosensor based on wide-area and intense light-matter interaction supported by QBIC

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 462, P. 142347 - 142347

Published: March 9, 2023

A quasi-bound state in the continuum (QBIC) has unique attraction optical switch, nonlinearity, communication, and sensing due to its ultrahigh radiation quality (Q) factor. The QBIC observed metasurfaces also provides a feasible platform achieve in-plane strong light-matter interaction, as well develop ultrasensitive biosensor. However, existing metasurface designs are difficult realize highly efficient excitation high-performance of terahertz (THz) band. Here, we manipulate interference coupling between electric quadrupole magnetic dipole by introducing an asymmetry α into metallic structure, which excites resonance with Q factor up 503. Correspondingly, light field energy constrained effective area achieved enormous increases about 400% 1300%, respectively, greatly expands spatial extent intensity interaction. Simulations experiments show that proposed deliver high refractive index sensitivity reaching 420 GHz/RIU, where RIU is unit, direct limit detection (LoD) for trace homocysteine (Hcy) molecules 12.5 pmol/μL. Its performance 40-times better than classical Dipole mode. This work new avenue rapid, precise, nondestructive molecules, potential applications fields biochemical reaction monitoring, photocatalysis photobiomodulation.

Language: Английский

---

Reconfigurable terahertz metamaterials: From fundamental principles to advanced 6G applications

iScience, Journal Year: 2022, Volume and Issue: 25(2), P. 103799 - 103799

Published: Jan. 21, 2022

Terahertz (THz) electromagnetic spectrum ranging from 0.1THz to 10THz has become critical for sixth generation (6G) applications, such as high-speed communication, fingerprint chemical sensing, non-destructive biosensing, and bioimaging. However, the limited response of naturally existing materials THz waves induced a gap in spectrum, where lack functional devices using natural occurred this gap. Metamaterials, artificially composed structures that can engineer properties manipulate waves, have enabled development many devices, known "metadevices". Besides, tunability metadevices be achieved by tunable microelectromechanical system (MEMS) technologies, well including phase change (PCMs), electro-optical (EOMs), thermo-optical (TOMs). Leveraging various tuning mechanisms together with metamaterials, tremendous research works demonstrated reconfigurable playing an important role fill toward 6G applications. This review introduces fundamental principles metamaterial resonant design their related Moreover, we provide perspectives on future photonic state-of-the-art

Language: Английский

---

A microfluidic chemiluminescence biosensor based on multiple signal amplification for rapid and sensitive detection of E. coli O157:H7

Biosensors and Bioelectronics, Journal Year: 2022, Volume and Issue: 212, P. 114390 - 114390

Published: May 17, 2022

Language: Английский

---

Review on the terahertz metasensor: from featureless refractive index sensing to molecular identification

Photonics Research, Journal Year: 2023, Volume and Issue: 12(2), P. 194 - 194

Published: Dec. 4, 2023

The terahertz (THz) wave is at the intersection between photonics and electronics in electromagnetic spectrum. Since vibration mode of many biomedical molecules weak interaction inside fall THz regime, utilizing radiation as a signal source to operate substance information sensing has its unique advantages. Recently, metamaterial sensor (metasensor) greatly enhanced substances spectral selectivity on subwavelength scale. However, most past review articles have demonstrated metasensor terms their structures, applications, or materials. Until recently, with rapid development metasensing technologies, molecular paid much more attention platform metasensors. In this review, we comprehensively introduce for detecting not only featureless refractive index but also vibrational/chiral analytes. objectives are improve specificity either by chemical material-assisted analyte capture physical information. Later, boost absorption features certain frequency, resonant responses metasensors can be tuned vibrational modes target molecules, while frequency multiplexing techniques reviewed enhance broadband spectroscopic fingerprints. chiral summarized specific identification molecules. Finally, potential prospects next generation discussed. Compared metasensing, platforms accelerated material modification will lead greater impact advancement trace detection conformational dynamics biomolecules practical applications.

Language: Английский

---

Terahertz Imaging and Sensing for Healthcare: Current Status and Future Perspectives

IEEE Access, Journal Year: 2023, Volume and Issue: 11, P. 18590 - 18619

Published: Jan. 1, 2023

There is a keen interest in the exploration of new generation emitters and detectors due to advancements innovation materials device processing technologies which have opened up frontiers Terahertz (THz) spectrum. Therefore, it necessary review developments THz technology for healthcare applications, their impact, implications prospects ongoing research development. This paper provides broad overview current status application imaging sensing domain. We present knowledge, identify existing challenges wide scale clinical adoption systems prospective opinions facilitate development towards optimized miniaturized biosensors that provide real operational convenience through emerging trends. Firstly, we an techniques exploit properties detection with emphasis on terahertz time domain spectroscopy (THz-TDS) Metamaterials. The mechanisms tissue image contrast biomedical applications particular, cancer reported. Secondly, outlook toward interface 4.0 its enabling explored next smart connected systems. Third, merits suggest pave way future research. Further, discuss recent advances contribution near-field based plasmonic, resonance metasurfaces, waveguides etc. breaking diffraction limit are convenient point care. bring researchers roadmap scope.

Language: Английский

---

Terahertz dynamic multichannel holograms generated by spin-multiplexing reflective metasurface

Optics Express, Journal Year: 2023, Volume and Issue: 32(1), P. 248 - 248

Published: Dec. 7, 2023

In recent years, metasurfaces have attracted considerable interest for their unprecedented capabilities to manipulate intensity, phase, and polarization of an electromagnetic wave. Although metasurface-based wavefront modulation has achieved numerous successful results, implementation multifunctional devices in a single metasurface still meet significant challenges. Here, novel multilayer structure is designed using properties vanadium dioxide (VO

Language: Английский

---

Metasurface-Assisted Terahertz Sensing

Sensors, Journal Year: 2023, Volume and Issue: 23(13), P. 5902 - 5902

Published: June 25, 2023

Terahertz (THz) waves, which fall between microwaves and infrared bands, possess intriguing electromagnetic properties of non-ionizing radiation, low photon energy, being highly sensitive to weak resonances, non-polar material penetrability. Therefore, THz waves are extremely suitable for sensing detecting chemical, pharmaceutical, biological molecules. However, the relatively long wavelength (30~3000 μm) compared size analytes (1~100 nm biomolecules, <10 μm microorganisms) constrains development THz-based sensors. To circumvent this problem, metasurface technology, by engineering subwavelength periodic resonators, has gained a great deal attention enhance resonance response waves. Those metasurface-based sensors exhibit high sensitivity label-free sensing, making them appealing variety applications in security, medical applications, detection. The performance is controlled geometric structure parameters. operating mechanism divided into two main categories, passive active. have profound understanding these metasurface-assisted technologies, we review categorize those sensors, based on their mechanisms, including resonators frequency shift nanogaps enhanced field confinement, chirality handedness detection, active elements (such as graphene MEMS) advanced tunable sensing. This comprehensive can serve guideline future metasurfaces design assist

Language: Английский

---

Ultra-wideband terahertz fingerprint enhancement sensing and inversion model supported by single-pixel reconfigurable graphene metasurface

PhotoniX, Journal Year: 2024, Volume and Issue: 5(1)

Published: April 15, 2024

Abstract The molecular fingerprint sensing technology based on metasurface has unique attraction in the biomedical field. However, terahertz (THz) band, existing designs multi-pixel or angle multiplexing usually require more analyte amount possess a narrower tuning bandwidth. Here, we propose novel single-pixel graphene metasurface. Based synchronous voltage tuning, this enables ultra-wideband ( $$\sim$$ ∼ 1.5 THz) enhancement of trace analytes, including chiral optical isomers, with limit detection (LoD) ≤ 0.64 μg/mm 2 . signal 17.4 dB) originates from electromagnetically induced transparency (EIT) effect excited by metasurface, and ideal overlap between light field constrained single-layer (SLG) ultra-thin analyte. Meanwhile, due to nonlinear mechanism absorption envelope distortion is inevitable. To solve problem, universal spectrum inversion model developed for first time, restoration standard fingerprints reaches R max ≥ 0.99. In addition, asynchronous provides an opportunity realizing dynamic reconfiguration EIT resonance slow modulation broadband range. This work builds bridge THz potential applications active spatial modulators, devices imaging equipments.

Language: Английский

---

Design and development of graphene-based double split ring resonator metasurface biosensor using MgF2-gold materials for blood cancer detection

Optical and Quantum Electronics, Journal Year: 2024, Volume and Issue: 56(7)

Published: May 25, 2024

Language: Английский

---