Log in

Relevant bibliographies by topics / Terahertz (THz) Bands / Journal articles

To see the other types of publications on this topic, follow the link: Terahertz (THz) Bands.

Journal articles on the topic 'Terahertz (THz) Bands'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Terahertz (THz) Bands.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Xu, Yikai. "Advances in CODE V design in terahertz imaging system." Advances in Engineering Technology Research 6, no. 1 (2023): 533. http://dx.doi.org/10.56028/aetr.6.1.533.2023.

Full text

Abstract:

The band of terahertz (THz) spans from microwave to infrared bands, which belongs to the transition band from macro-electronics to micro-photonics, possessing peculiarities different from electromagnetic waves in other bands. THz technology with the characteristics of high penetration, broadband, high resolution and transient are employed in various fields, such as space remote sensing, nondestructive detection biomedical imaging and near-field microscopy. These broad applications, in turn, provide incentive to further improve the basic performance of THz technology. Aiming at the application

APA, Harvard, Vancouver, ISO, and other styles

2

Chen, Yinwei, Feifei Qin, Lijuan Liu, et al. "0.4 THz Broadband Terahertz Noise Source Based on Photoconductive Antennas." Photonics 12, no. 3 (2025): 252. https://doi.org/10.3390/photonics12030252.

Full text

Abstract:

Terahertz noise sources have important application prospects in noise figure measurements. In this paper, a 0.4 THz broadband terahertz noise source based on a photoconductive antenna is proposed. As a demonstration of feasibility, this terahertz noise source is generated by mixing three beams of Gaussian-shaped incoherent light. The resulting excess noise ratio (ENR) across different frequency bands is as follows: 20.9 dB, with a flatness of ±7.9 dB in the 75~110 GHz range; 19.3 dB, with a flatness of ±6.2 dB in the 110~170 GHz range; 20.6 dB, with a flatness of ±4.8 dB in the 170~260 GHz ran

APA, Harvard, Vancouver, ISO, and other styles

3

Jiang, Ye, Fengshan Zhou, Xiaodong Wen, et al. "Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid State." Journal of Spectroscopy 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/732802.

Full text

Abstract:

Terahertz (THz) absorption spectra of the similarly structured molecules with amide groups including benzamide, acrylamide, caprolactam, salicylamide, and sulfanilamide in the solid phase at room temperature and 7.8 K for salicylamide are reported and compared to infrared vibrational spectral calculations using density functional theory. The results of THz absorption spectra show that the molecules have characteristic bands in the region of 0.2–2.6 THz (~7–87 cm−1). THz technique can be used to distinguish different molecules with amide groups. In the THz region benzamide has three bands at 0.

APA, Harvard, Vancouver, ISO, and other styles

4

Salonga Ponseca, Carlito Jr, Mustafa Al-Shamali, Mindaugas Karaliunas, et al. "Characterization of Kuwait Crude Oil via Terahertz Fourier Transform Spectroscopy." EPJ Web of Conferences 309 (2024): 10011. http://dx.doi.org/10.1051/epjconf/202430910011.

Full text

Abstract:

We report the experimental and theoretical terahertz (THz) absorption characteristics of unprocessed crude oils from Kuwait oil wells. Using THz Fourier transform spectroscopy technique and semi-empirical computational chemistry calculation, five of the 30 crude oils revealed characteristic absorbance spectra. Experimental data showed absorption peaks at 6.0 THz, 7.7 THz, 13 THz, and 16 THz. On the other hand, the calculated spectral bands of 10 nonane molecules were found at around 2.8 THz, 7.7 THz, 10 THz, and 16 THz. Although only two bands were predicted by the calculation, adding alkane m

APA, Harvard, Vancouver, ISO, and other styles

5

Nakanishi, Atsushi, Shohei Hayashi, Hiroshi Satozono, and Kazuue Fujita. "Spectroscopic Imaging with an Ultra-Broadband (1–4 THz) Compact Terahertz Difference-Frequency Generation Source." Electronics 10, no. 3 (2021): 336. http://dx.doi.org/10.3390/electronics10030336.

Full text

Abstract:

We demonstrate spectroscopic imaging using a compact ultra-broadband terahertz semiconductor source with a high-power, mid-infrared quantum cascade laser. The electrically pumped monolithic source is based on intra-cavity difference-frequency generation and can be designed to achieve an ultra-broadband multi-mode terahertz emission spectrum extending from 1–4 THz without any external optical setup. Spectroscopic imaging was performed with three frequency bands, 2.0 THz, 2.5 THz and 3.0 THz, and as a result, this imaging technique clearly identified three different tablet components (polyethyle

APA, Harvard, Vancouver, ISO, and other styles

6

Yin, Shan, Xintong Shi, Wei Huang, et al. "Two-Bit Terahertz Encoder Realized by Graphene-Based Metamaterials." Electronics 8, no. 12 (2019): 1528. http://dx.doi.org/10.3390/electronics8121528.

Full text

Abstract:

Terahertz (THz) technologies have achieved great progress in the past few decades. Developing active devices to control the THz waves is the frontier of THz applications. In this paper, a new scheme of two-bit THz encoder is proposed. Different from the present THz modulators whose spectra at different bands are varied simultaneously, our encoder can realize the individually efficient modulation of every channel. The encoder comprises the double-sided graphene-based metamaterials, in which the graphene structures on each side are connected to the external electrodes individually. The well-desi

APA, Harvard, Vancouver, ISO, and other styles

7

Asif, Muhammad, Qiong Wang, Zhengbiao Ouyang, Mi Lin, and Zixian Liang. "Ultra-Wideband Terahertz Wave Absorber Using Vertically Structured IGIGIM Metasurface." Crystals 14, no. 1 (2023): 22. http://dx.doi.org/10.3390/cryst14010022.

Full text

Abstract:

Achieving perfect absorption of electromagnetic waves across a wide range of frequencies is crucial for various applications, including sensing, imaging, and energy capture. In this study, we introduced a new concept for metasurfaces and proposed a six-layer vertically structured IGIGIM metasurface consisting of gold (Au), silicon (Si), graphene (G1), silica (SiO2), a second layer of graphene (G2), and polymethyl methacrylate (PMMA), which demonstrates ultra-wideband absorptance in the terahertz (THz) region. Through theoretical analysis and numerical simulations, we obtained broadband absorpt

APA, Harvard, Vancouver, ISO, and other styles

8

Ghosh, Monisha, Arindam Biswas, and Aritra Acharyya. "Terahertz Radiators Based on Si~3C-SiC MQW IMPATT Diodes." Nanoscience & Nanotechnology-Asia 10, no. 4 (2020): 501–6. http://dx.doi.org/10.2174/2210681209666190807154014.

Full text

Abstract:

Aims:: The potentiality of Multiple Quantum Well (MQW) Impacts Avalanche Transit Time (IMPATT) diodes based on Si~3C-SiC heterostructures as possible terahertz radiators have been explored in this paper. Objective:: The static, high frequency and noise performance of MQW devices operating at 94, 140, and 220 GHz atmospheric window frequencies, as well as 0.30 and 0.50 THz frequency bands, have been studied in this paper. Methods: The simulation methods based on a Self-Consistent Quantum Drift-Diffusion (SCQDD) model developed by the authors have been used for the above-mentioned studies. Resul

APA, Harvard, Vancouver, ISO, and other styles

9

Wang, Qian, Yuzi Chen, Jinxian Mao, Fengyuan Yang, and Nan Wang. "Metasurface-Assisted Terahertz Sensing." Sensors 23, no. 13 (2023): 5902. http://dx.doi.org/10.3390/s23135902.

Full text

Abstract:

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, and non-polar material penetrability. Therefore, THz waves are extremely suitable for sensing and detecting chemical, pharmaceutical, and biological molecules. However, the relatively long wavelength of THz waves (30~3000 μm) compared to the size of analytes (1~100 nm for biomolecules, <10 μm for microorganisms) constrains the development of THz-based sensors. To circumvent this problem

APA, Harvard, Vancouver, ISO, and other styles

10

Tomimura, Yuga, Akira Satou, and Tomohiro Kita. "Generation of Millimeter Waves and Sub-Terahertz Waves Using a Two-Wavelength Tunable Laser for a Terahertz Wave Transceiver." Photonics 11, no. 9 (2024): 811. http://dx.doi.org/10.3390/photonics11090811.

Full text

Abstract:

As global internet traffic continues to increase, technologies for generating high-frequency signals, such as sub-terahertz (sub-THz) bands, through photonics are gaining attention. In this study, we demonstrate the generation of millimeter waves at approximately 17 GHz and sub-THz waves at approximately 300 GHz by converting the frequency difference of a two-wavelength tunable laser, fabricated using silicon photonics, into an optical–electrical signal. This device is expected to be used as a compact and low power consumption, two-wavelength tunable light source for THz wave transceivers.

APA, Harvard, Vancouver, ISO, and other styles

11

Zhang, Shaohua, Zhifu Wei, Ling Xu, Jianwei Xu, Shoujian Ouyang, and Yun Shen. "Plasmonic Fishnet Structures for Dual Band THz Left-Handed Metamaterials." Photonics 8, no. 4 (2021): 116. http://dx.doi.org/10.3390/photonics8040116.

Full text

Abstract:

Plasmonic fishnet structures are proposed to realize dual-band terahertz (THz) left-handed metamaterials (LHMs). The calculated permittivity ε and permeability μ of single-layer LHMs show that ε < 0 and μ < 0 can be simultaneously satisfied in two frequency bands, resulting in dual-band LHMs. The electric and magnetic field distributions are consistent with the current distributions and confirm the physical mechanism of negative permeability. Furthermore, the existence of negative refraction is validated by a stacked LHMs prism with an angle of 1.79°. It is shown that at 2.04–2.42 THz an

APA, Harvard, Vancouver, ISO, and other styles

12

Kuznetsov, Kirill A., Sergey A. Tarasenko, Polina M. Kovaleva, et al. "Topological Insulator Films for Terahertz Photonics." Nanomaterials 12, no. 21 (2022): 3779. http://dx.doi.org/10.3390/nano12213779.

Full text

Abstract:

We discuss experimental and theoretical studies of the generation of the third terahertz (THz) frequency harmonic in thin films of Bi2Se3 and Bi2-xSbxTe3-ySey (BSTS) topological insulators (TIs) and the generation of THz radiation in photoconductive antennas based on the TI films. The experimental results, supported by the developed kinetic theory of third harmonic generation, show that the frequency conversion in TIs is highly efficient because of the linear energy spectrum of the surface carriers and fast energy dissipation. In particular, the dependence of the third harmonic field on the pu

APA, Harvard, Vancouver, ISO, and other styles

13

Jubgang Fandio, Défi Junior, Stéphanie Sauze, Abderraouf Boucherif, Richard Arès, and Denis Morris. "Structural, optical and terahertz properties of graphene-mesoporous silicon nanocomposites." Nanoscale Advances 2, no. 1 (2020): 340–46. http://dx.doi.org/10.1039/c9na00502a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Ye, Hai-Mu, Han Li, and Shu-Fang Yao. "Characterizing the Structure and Phase Transformation of Poly(ethylene Oxide)–Urea Complexes Using Terahertz Time-Domain Spectroscopy." Applied Spectroscopy 71, no. 11 (2017): 2549–54. http://dx.doi.org/10.1177/0003702817722573.

Full text

Abstract:

Terahertz time-domain spectroscopy (THz-TDS) was employed to characterize the structure and α→β phase transformation of poly(ethylene oxide) (PEO)–urea complexes. While the THz responses of α- and β-form complexes are both originated from hydrogen bonding interactions, they possess different THz absorption bands. The α-form PEO–urea complex shows two bands at 1.12 and 1.24 THz, which are vibration modes due to the hydrogen bonding among urea and between PEO and urea, respectively; the β-form PEO–urea complex shows a band at 1.48 THz, which is a vibration mode due to the hydrogen bonding among

APA, Harvard, Vancouver, ISO, and other styles

15

Li, Gaofang, Chenguang Huang, Renjie Huang, et al. "Design of a High-Gain and Tri-Band Terahertz Microstrip Antenna Using a Polyimide Rectangular Dielectric Column Photonic Band Gap Substrate." Photonics 11, no. 4 (2024): 307. http://dx.doi.org/10.3390/photonics11040307.

Full text

Abstract:

A high-gain and tri-band terahertz microstrip antenna with a photonic band gap (PBG) substrate is presented in this paper for terahertz communications. Polyimide dielectric columns are inserted into the silicon substrate to form the PBG substrate to improve the gain of the antenna. The PBG substrate and polyimide substrate constituted a multilayer substrate structure and enabled the multi-band operation of the antenna. The PBG substrate antenna achieves gains of 6.28 dB, 4.84 dB, and 7.66 dB at resonant frequencies of 0.360 THz, 0.580 THz, and 0.692 THz, respectively, outperforming the homogen

APA, Harvard, Vancouver, ISO, and other styles

16

Wood, David, Martyn Chamberlain, Adam Baragwanath, Linzi Dodd, Carlo Hill, and Andrew J. Gallant. "Micromachined Devices for Use in Terahertz Applications." Advances in Science and Technology 81 (September 2012): 20–27. http://dx.doi.org/10.4028/www.scientific.net/ast.81.20.

Full text

Abstract:

Here we present results from key aspects of our interest in using micromachined devices in the THz region. First, our early work on making filters from rods of gold-coated SU8 is described. Pass (up to 97%) and stop bands can be observed which are theoretically underpinned by both FDTD and complex band structure simulations. Second, there is a discussion of how THz radiation passes through two-dimensional periodic arrays of subwavelength apertures. In particular, the geometry of the arrays has been studied with time-domain spectroscopy. A time-of-flight model is presented which can be used to

APA, Harvard, Vancouver, ISO, and other styles

17

Xu, Lan-Lan, Ya-Xian Fan, Huan Liu, Tao Zhang, and Zhi-Yong Tao. "Terahertz Displacement Sensing Based on Interface States of Hetero-Structures." Electronics 9, no. 8 (2020): 1213. http://dx.doi.org/10.3390/electronics9081213.

Full text

Abstract:

Herein, we propose a nano displacement sensor based on the interface state of a terahertz hetero-structure waveguide. The waveguide consists of two periodically corrugated metallic tubes with different duty ratios, which can result in similar forbidden bands in their frequency spectra. It was found that the topological properties of these forbidden bands are different, and the hetero-structure can be formed by connecting these two waveguides. In the hetero-structure waveguide, the interface state of an extraordinary transmission can always arise within the former forbidden bands, the peak freq

APA, Harvard, Vancouver, ISO, and other styles

18

Tan, Camille Merlin S., and Lawrence Materum. "A Comparison of Wireless Devices for Terahertz Imaging Applications." International Journal of Circuits, Systems and Signal Processing 15 (December 6, 2021): 1702–13. http://dx.doi.org/10.46300/9106.2021.15.184.

Full text

Abstract:

As technology advances, notable scientific research accomplishments have been made. Terahertz (THz) waves have been seen to have endless potential applications that could further improve the current limitations of other frequency bands for imaging applications. Currently, THz waves display great potential in various applications due to their noninvasive and nonionizing features. However, the THz band has not been technically well established. This paper focuses on a comparative survey of the current methods applied in THz imaging in the field of medical and industrial security applications. Di

APA, Harvard, Vancouver, ISO, and other styles

19

Zhang, Min, Guanxuan Guo, Yihan Xu, et al. "Exploring the Application of Multi-Resonant Bands Terahertz Metamaterials in the Field of Carbohydrate Films Sensing." Biosensors 13, no. 6 (2023): 606. http://dx.doi.org/10.3390/bios13060606.

Full text

Abstract:

Terahertz spectroscopy is a powerful tool for investigating the properties and states of biological matter. Here, a systematic investigation of the interaction of THz wave with “bright mode” resonators and “dark mode” resonators has been conducted, and a simple general principle of obtaining multiple resonant bands has been developed. By manipulating the number and positions of bright mode and dark mode resonant elements in metamaterials, we realized multi-resonant bands terahertz metamaterial structures with three electromagnetic-induced transparency in four-frequency bands. Different carbohy

APA, Harvard, Vancouver, ISO, and other styles

20

Андрианов, А. В., та А. Н. Алешин. "Терагерцевое поглощение в композитных пленках на основе металлоорганического перовскита и смешанного эфира целлюлозы". Письма в журнал технической физики 46, № 10 (2020): 51. http://dx.doi.org/10.21883/pjtf.2020.10.49434.18269.

Full text

Abstract:

Composites based on the organometallic perovskite CH3NH3PbI3 and mixed cellulose ester were studied by terahertz time-domain spectroscopy. It is shown that the introduction of mixed cellulose esters into the precursor of organometallic perovskite CH3NH3PbI3 significantly modifies the parameters of perovskite in the terahertz region and also improves the stability of such composite films. It is found that the addition of mixed cellulose ester to the perovskite film leads to a significant weakening of the THz absorption bands in the frequency range of the order of 1 and 2 THz, which are caused b

APA, Harvard, Vancouver, ISO, and other styles

21

Zhang, Jinnan, Shijie Tao, Xin Yan, Xia Zhang, Jinxuan Guo, and Zhiqiang Wen. "Dual-Frequency Polarized Reconfigurable Terahertz Antenna Based on Graphene Metasurface and TOPAS." Micromachines 12, no. 9 (2021): 1088. http://dx.doi.org/10.3390/mi12091088.

Full text

Abstract:

A hybrid dual-frequency polarized reconfigurable terahertz antenna is designed and studied. Graphene and TOPAS are employed as the polarization conversion metasurface and dielectric substrate, respectively, enabling tunable polarization conversion and circular polarization. TOPAS is a good substrate material for broadband THz components due to its low absorption. By adjusting the chemical potential of graphene between 0 eV and 0.5 eV, the polarization state in the band of 1 THz (0.76–1.02 THz) and 2.5 THz (2.43–2.6 THz) can be reconstructed. Thanks to the multilayer graphene structure and low

APA, Harvard, Vancouver, ISO, and other styles

22

V. Kapralova, Angelina, and Aleksandr S. Pogodin. "Influence of Terahertz Radiation of Various Ranges on Molecule Conformation of Bovine Serum Albumin." Siberian Journal of Physics 5, no. 4 (2010): 182–85. http://dx.doi.org/10.54362/1818-7919-2010-5-4-182-185.

Full text

Abstract:

We investigated the influence of THz laser radiation of frequencies of 1.15 THz and 3.68 THz and radiation power of about 10 Mw on protein (bovine serum albumin). Using UV spectrophotometry, we revealed increase in the optical density of irradiated samples of bovine serum albumin at the characteristic absorption bands, which is evidence of conformation changes in protein molecules

APA, Harvard, Vancouver, ISO, and other styles

23

Alharbi, Abdullah G., and Vishal Sorathiya. "Ultra-Wideband Graphene-Based Micro-Sized Circular Patch-Shaped Yagi-like MIMO Antenna for Terahertz Wireless Communication." Electronics 11, no. 9 (2022): 1305. http://dx.doi.org/10.3390/electronics11091305.

Full text

Abstract:

In this work, an ultra-wideband graphene-based micro-sized circular patch-shaped Yagi-like MIMO antenna was investigated over 1–30 THz of the frequency spectrum. The proposed antenna structure was designed over a polyimide substrate with 620 × 800 µm2. This antenna was radiated over three bands over 1–30 THz. The maximum bandwidth achieved 10.96 THz, with −26 dB of the return loss isolation. These three bands were also mathematically analyzed using various MIMO antenna parameters to match the MIMO antenna criteria. This antenna provided all the accepted results as per the limits set by these a

APA, Harvard, Vancouver, ISO, and other styles

24

Tsybrii, Z., O. Golenkov, Z. Maksimenko, and P. Smertenko. "Development of terahertz approaches for optoelectronics and the SPQEO journal." Semiconductor Physics, Quantum Electronics and Optoelectronics 27, no. 04 (2024): 384–88. https://doi.org/10.15407/spqeo27.04.384.

Full text

Abstract:

This article discusses the main trends in the development of terahertz (THz) optoelectronics, which bridge the gap between traditional electronics and the unexplored part of electromagnetic spectrum known as the “THz gap”. Each of the THz bands: the submillimeter range (0.1 to 0.3 THz), the low range (0.3 to 1 THz), the midrange (1 to 3 THz), the high range (3 to 10 THz), and the ultrafast range (above 10 THz) requires development of specific research approaches, materials, devices and applications. This article reports on the contribution of SPQEO journal to the development of THz optoelectro

APA, Harvard, Vancouver, ISO, and other styles

25

Ye, Longfang, Fang Zeng, Yong Zhang, Xiong Xu, Xiaofan Yang, and Qing Liu. "Frequency-Reconfigurable Wide-Angle Terahertz Absorbers Using Single- and Double-Layer Decussate Graphene Ribbon Arrays." Nanomaterials 8, no. 10 (2018): 834. http://dx.doi.org/10.3390/nano8100834.

Full text

Abstract:

We propose and numerically demonstrate two novel terahertz absorbers made up of periodic single- and double-layer decussate graphene ribbon arrays. The simulated results show that the proposed absorbers have narrowband near-unity terahertz absorption with ultra-wide frequency reconfiguration and angular stability. By tuning the Fermi level of graphene ribbons, the over 90% absorbance peak frequency of the absorber with single-layer graphene structure can be flexibly adjusted from 6.85 to 9.85 THz for both the transverse magnetic (TM) and transverse electric (TE) polarizations. This absorber wi

APA, Harvard, Vancouver, ISO, and other styles

26

Lin, Tsung-Tse. "Study on high power and control of metamaterial THz QCLs." Impact 2020, no. 1 (2020): 48–50. http://dx.doi.org/10.21820/23987073.2020.1.48.

Full text

Abstract:

Quantum-cascade lasers (QCLs) are a special kind of semiconductor laser. They emit in the mid- and long-wave infrared bands and, instead of operating on laser transitions between different electronic bands, they operate on intersubband transitions of a semiconductor structure. Their potential has piqued the interest of researchers, with possible applications in a number of areas, including precision sensing, military applications and spectroscopy. As they have a wide tuning range and fast response time, their use allows for precision in devices, such as element detectors and gas analysers. A t

APA, Harvard, Vancouver, ISO, and other styles

27

Lin, Tsung-Tse. "Study on high power and control of metamaterial THz QCLs." Impact 2020, no. 2 (2020): 54–56. http://dx.doi.org/10.21820/23987073.2020.2.54.

Full text

Abstract:

Quantum-cascade lasers (QCLs) are a special kind of semiconductor laser. They emit in the mid- and long-wave infrared bands and, instead of operating on laser transitions between different electronic bands, they operate on intersubband transitions of a semiconductor structure. Their potential has piqued the interest of researchers, with possible applications in a number of areas, including precision sensing, military applications and spectroscopy. As they have a wide tuning range and fast response time, their use allows for precision in devices, such as element detectors and gas analysers. A t

APA, Harvard, Vancouver, ISO, and other styles

28

Lu, Xuejing, Hongyi Ge, Yuying Jiang, and Yuan Zhang. "A Dual-Band High-Sensitivity THz Metamaterial Sensor Based on Split Metal Stacking Ring." Biosensors 12, no. 7 (2022): 471. http://dx.doi.org/10.3390/bios12070471.

Full text

Abstract:

Terahertz (THz)-detection technology has been proven to be an effective and rapid non-destructive detection approach in biomedicine, quality control, and safety inspection, among other applications. However, the sensitivity of such a detection method is limited due to the insufficient power of the terahertz source and the low content, or ambiguous characteristics, of the analytes to be measured. Metamaterial (MM) is an artificial structure in which periodic sub-wavelength units are arranged in a regular manner, resulting in extraordinary characteristics beyond those possessed by natural materi

APA, Harvard, Vancouver, ISO, and other styles

29

Barzegar-Parizi, Saeedeh, and Amir Ebrahimi. "Terahertz High-Q Absorber Based on Holes Array Perforated into a Metallic Slab." Electronics 10, no. 15 (2021): 1860. http://dx.doi.org/10.3390/electronics10151860.

Full text

Abstract:

In this paper, we theoretically analyze and design a dual-narrowband terahertz (THz) absorber based on a hole array drilled into a metallic slab. A very high-quality factor (Q) is achieved at both of the resonance frequencies. A circuit model-based approach is developed for the analysis and design of the proposed absorber. The absorption peaks occur at 2.46 and 3.75 THz frequencies with 98% and 96% absorptions at normal incidence, respectively. The achieved quality factors are 149 and 144, at 50% absorbance for the two absorption bands, respectively.

APA, Harvard, Vancouver, ISO, and other styles

30

Luo, Xiaoqing, Xiaoxiang Dong, Xinlong Xu, Fangrong Hu, and Guangyuan Li. "Narrowband terahertz metasurface circular polarization beam splitter with large spectral tunability based on lattice-induced chirality." Journal of Physics D: Applied Physics 55, no. 10 (2021): 105109. http://dx.doi.org/10.1088/1361-6463/ac3e2b.

Full text

Abstract:

Abstract We propose a terahertz metasurface with chirality induced by surface lattice resonance to create a narrowband circular polarization beam splitter (PBS) with large spectral tunability in both transmission and reflection modes. Results show that strong circular dichroism effects can be observed in two spectrally narrow bands, and thus a dual-band circular PBS can be achieved. We show that surface lattice resonance induces much narrower and stronger circular dichroism effects than localized resonance, resulting in higher polarization extinction ratios, higher quality factors, and more ci

APA, Harvard, Vancouver, ISO, and other styles

31

Yoo, Hyung Keun, Soo Bin Cho, Sae June Park, et al. "Metal-Organic Hybrid Metamaterials for Spectral-Band Selective Active Terahertz Modulators." Applied Sciences 11, no. 6 (2021): 2765. http://dx.doi.org/10.3390/app11062765.

Full text

Abstract:

Optically controlled spectral-band selective terahertz (THz) modulators based on metal-organic hybrid metamaterials were investigated. An artificially structured material, which consists of two single split-ring resonators put together on the split gap side, was patterned on a silicon substrate to generate frequency-selective properties. An active layer of an organic thin film (fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester, also called PCBM) was deposited on the metamaterial-silicon structure for modulating the transmission of incident THz radiation. The metal-organic hybrid

APA, Harvard, Vancouver, ISO, and other styles

32

Chow, Bing Jie, Chang Liu, Mingyi Yu, et al. "The Application of Terahertz Technology in Corneas and Corneal Diseases: A Systematic Review." Bioengineering 12, no. 1 (2025): 45. https://doi.org/10.3390/bioengineering12010045.

Full text

Abstract:

Terahertz (THz) waves reside in the electromagnetic spectrum between the microwave and infrared bands. In recent decades, THz technology has demonstrated its potential for biomedical applications. With the highly unique characteristics of THz waves, such as the high sensitivity to water and optimal spatial resolution coupled with the characteristics of the human cornea, such as its high water content, THz technology has been explored as a potential modality to assess corneas and corneal diseases. This systematic review provides an overview of the characteristics of THz waves, the safety profil

APA, Harvard, Vancouver, ISO, and other styles

33

Sohoo, Arslan, Fauziahanim Che Seman, Izhar Ahmed Sohu, Noor Ummi Hazirah, and Abdul Fattah Chandio. "Investigation of Two-Wire Power Line for Efficient Propagation of THz Waves for Future 6G Communication Systems." Journal of Applied Engineering & Technology (JAET) 7, no. 1 (2023): 48–56. http://dx.doi.org/10.55447/jaet.07.01.113.

Full text

Abstract:

The hunger for high speed data transmission and wide bandwidth has led to exploration of the terahertz (THz) frequency bands. Designing an efficient waveguide that propagates the THz waves with minimum loss at such high frequencies is quite challenging. In this paper, commercially available two solid core wires are investigated for the efficient propagation of THz waves using higher order modes. The THz radiation propagates wirelessly through the dielectric space between two wires. The effect of different airgaps between the two wires is also analyzed to analyze its various propagation phenome

APA, Harvard, Vancouver, ISO, and other styles

34

Sun, Fang-Zheng, Guo-Qian Liao, Hong-Yi Lei, et al. "A non-collinear autocorrelator for single-shot characterization of ultrabroadband terahertz pulses." Review of Scientific Instruments 93, no. 12 (2022): 123003. http://dx.doi.org/10.1063/5.0101228.

Full text

Abstract:

Conventional terahertz (THz) waveform or spectral diagnostics mainly employ the electro-optic-based techniques or the multi-shot Michelson interferometer. Simultaneously, single-shot, ultrabroadband THz spectral measurements remain challenging. In this paper, a novel probe-free scheme based on the non-collinear autocorrelation technique is proposed to characterize the ultrabroadband THz spectrum at a single-shot mode. The non-collinear autocorrelator is a modified beam-division interferometer, in which the two beams are recombined non-collinearly onto a camera. The temporal or spectral resolut

APA, Harvard, Vancouver, ISO, and other styles

35

Wang, Qiqi, Jiadan Xue, Zhi Hong, and Yong Du. "Pharmaceutical Cocrystal Formation of Pyrazinamide with 3-Hydroxybenzoic Acid: A Terahertz and Raman Vibrational Spectroscopies Study." Molecules 24, no. 3 (2019): 488. http://dx.doi.org/10.3390/molecules24030488.

Full text

Abstract:

Vibrational modes of pyrazinamide (PZA), 3-hydroxybenzoic acid (3-hBA), and their cocrystal were characterized using terahertz time-domain (THz-TDS) and Raman vibrational spectroscopic techniques. In experimental THz spectra, the cocrystal has characteristic absorption bands at around 0.81, 1.47, and 1.61 THz, respectively, meanwhile the raw materials are absolutely different in this region. Raman spectra also show similar results about differences between the cocrystal and corresponding starting parent materials. Density functional theory (DFT) was used to simulate both optimized structures a

APA, Harvard, Vancouver, ISO, and other styles

36

Lu, Xueguang, Bowen Dong, Hongfu Zhu, et al. "Two-Channel VO2 Memory Meta-Device for Terahertz Waves." Nanomaterials 11, no. 12 (2021): 3409. http://dx.doi.org/10.3390/nano11123409.

Full text

Abstract:

Vanadium oxide (VO2), as one of the classical strongly correlated oxides with a reversible and sharp insulator-metal transition (IMT), enables many applications in dynamic terahertz (THz) wave control. Recently, due to the inherent phase transition hysteresis feature, VO2 has shown favorable application prospects in memory-related devices once combined with metamaterials or metasurfaces. However, to date, VO2-based memory meta-devices are usually in a single-channel read/write mode, which limits their storage capacity and speed. In this paper, we propose a reconfigurable meta-memory based on V

APA, Harvard, Vancouver, ISO, and other styles

37

Hoshina, Hiromichi, Yuichi Saito, Takumi Furuhashi, et al. "Terahertz Spectroscopy for Characterization of Hydrogen Bonding and Cross-linked Structure Dynamics in Polyurethane." Journal of Infrared, Millimeter, and Terahertz Waves 41, no. 3 (2020): 265–75. http://dx.doi.org/10.1007/s10762-019-00667-0.

Full text

Abstract:

AbstractTerahertz (THz) absorption spectra of cross-linked polyurethane films were observed at 30–180 °C. The obtained spectra displayed characteristic absorption bands. A band observed at 2.6 THz was assigned to the C=O···N-H hydrogen bond vibration using previously reported data. DFT calculation results confirmed that a band at 7.5 THz arises owing to the torsional vibration of cross-linked molecules containing urethane bonds. The slight changes in the temperature-dependent spectra were analyzed by the first derivative of absorption intensity with temperature. The thermal behavior of absorpt

APA, Harvard, Vancouver, ISO, and other styles

38

Shakirah Wahida Shamsul Bahri, Siti Nor Khadijah Addis, Nur Farizan Munajat, Nabilah Kasim, and Hidayatul Aini Zakaria. "Terahertz Spectroscopy Analysis of Amyloid Fibrils Derived from Human Serum Albumin." Journal of Advanced Research in Applied Sciences and Engineering Technology 43, no. 1 (2024): 160–70. http://dx.doi.org/10.37934/araset.43.1.160170.

Full text

Abstract:

Amyloid fibrils, also referred to as protein fibrils, represent irregular assemblies of proteins exhibiting a cross-β configuration. Terahertz radiation, a segment of the electromagnetic spectrum spanning 0.3 to 10 terahertz (THz), is known to interact with these fibrils due to their cylindrical shape. This study's objective was to explore the potential of terahertz spectroscopy as a non-invasive means to detect the progressive growth of protein fibrils. In this investigation, human serum albumin (HSA) was synthetically induced to form protein fibrils. Confirmation of fibril formation was done

APA, Harvard, Vancouver, ISO, and other styles

39

Mura, Monica La, Dajana Cassioli, Maksim Shundalau, Ernestina Cianca, and Patrizia Lamberti. "Graphene Devices for Aerial Wireless Communications at THz." Journal of Physics: Conference Series 2716, no. 1 (2024): 012045. http://dx.doi.org/10.1088/1742-6596/2716/1/012045.

Full text

Abstract:

Abstract This paper investigates the state-of-the-art of graphene-based technologies for the prospective use cases of end-to-end terahertz (THz) communication systems, such as industrial Internet of Things (IoT) applications and unmanned aerial vehicles (UAVs). THz communications offer ultra-high throughput and enhanced sensing capabilities, enabling advanced applications like UAV swarms and integrated sensing, localization, and mapping. The potential of wireless THz communication can be unlocked by graphene technology. Graphene, owing to its remarkable electrical, thermal, and mechanical prop

APA, Harvard, Vancouver, ISO, and other styles

40

Zhang, Ximeng, Weiwei Wu, Chenxin Li, et al. "A Dual-Band Terahertz Absorber with Two Passbands Based on Periodic Patterned Graphene." Materials 12, no. 18 (2019): 3016. http://dx.doi.org/10.3390/ma12183016.

Full text

Abstract:

In this paper, a dual-band terahertz absorber with two passbands is proposed. The absorber is composed of periodic patterned graphene arrays on the top of a SiO 2 substrate and a frequency selective surface (FSS) on the bottom of the substrate. The simulated results indicate that there are two absorption bands (absorption greater than 90%) ranging from 0.54 to 0.84 THz and 2.13 to 2.29 THz. It is almost transparent to incident waves (transmission greater than 50%) below 0.19 THz and between 1.3 and 1.67 THz with a center frequency of 1.49 THz. The absorber has a good tolerance to the transvers

APA, Harvard, Vancouver, ISO, and other styles

41

Gao, Sheng, Shunli Li, Hongxin Zhao, and Xiaoxing Yin. "Dual Circularly Polarized Encoding Terahertz Tag with Linked-Semi-Ellipses Elements." Electronics 14, no. 10 (2025): 2013. https://doi.org/10.3390/electronics14102013.

Full text

Abstract:

This paper presents a dual circularly polarized encoding terahertz tag utilizing linked-semi-ellipses elements. The proposed design achieves broadband 2-bit polarization encoding in terahertz frequency bands through independently controlling dual circularly polarized phases with linked-semi-ellipses elements. The tag simultaneously possesses two key functionalities: circular polarization conversion and circular polarization encoding, which enhance its resilience to environmental influences. Simulations demonstrated the polarization conversion rates exceeding 80% across 0.42–0.53 THz with refle

APA, Harvard, Vancouver, ISO, and other styles

42

Hikmat Abd, Reem, and Hussein Ali Abdualnubi. "RECONFIGURABLE GRAPHENE-BASED MULTI-INPUT-MULTI-OUTPUT ANTENNA FOR SIXTH GENERATION AND BIOMEDICAL APPLICATION." Journal of Engineering and Sustainable Development 27, no. 6 (2023): 798–810. http://dx.doi.org/10.31272/jeasd.27.6.10.

Full text

Abstract:

In this paper, a small MIMO antenna with a semi-hexagonal form is developed for use in terahertz applications. The suggested antenna consists of four radiating components printed on a Silicon Dioxide substrate that is 90 ×90 with a thickness of 10 µm. The radiating components have been positioned in an orthogonal orientation to produce excellent isolation and miniaturization of the MIMO system. The suggested MIMO antenna works for all the (0.1-10)THz bands with different values of chemical potential with wide impedance bandwidth (S11 ≤ -10dB) in the frequency range of 2.4 to more than 10 THz,

APA, Harvard, Vancouver, ISO, and other styles

43

Zhu, Aijun, Pengcheng Bu, Lei Cheng, Cong Hu, and Rabi Mahapatra. "High-Sensitivity Sensor Based on Diametrical Graphene Strip Plasma-Induced Transparency." Photonics 10, no. 7 (2023): 830. http://dx.doi.org/10.3390/photonics10070830.

Full text

Abstract:

In this paper, two parallel graphene strip structures are adopted to achieve tunable plasma-induced transparency (PIT) sensors in the terahertz band. Both graphene bands act as bright modes, and a PIT window appears due to the weak hybridization between them. A Lorentzian oscillation coupling model is fitted to the simulation results of the proposed structure by the finite-difference time-domain (FDTD) method and is in good agreement with the simulation results. The performance of the PIT system can be controlled by tuning the geometrical parameters of the structure. In addition, the resonant

APA, Harvard, Vancouver, ISO, and other styles

44

Mickan, S. P., and X. C. Zhang. "T-Ray Sensing and Imaging." International Journal of High Speed Electronics and Systems 13, no. 02 (2003): 601–76. http://dx.doi.org/10.1142/s0129156403001843.

Full text

Abstract:

Terahertz (THz) radiation occupies part of the electromagnetic spectrum between the infrared and microwave bands. Until recently, technology at THz frequencies was under-developed compared to the rest of the electromagnetic spectrum, leaving a gap between millimeter waves and the far-infrared (FIR). In the past decade, interest in the THz gap has been increased by the development of ultrafast laser-based T-ray systems and their demonstration of diffraction-limited spatial resolution, picosecond temporal resolution, DC-THz spectral bandwidth and signal-to-noise ratios above 104. This chapter re

APA, Harvard, Vancouver, ISO, and other styles

45

Chen, Zihao, Pinggen Cai, Qiye Wen, et al. "Graphene Multi-Frequency Broadband and Ultra-Broadband Terahertz Absorber Based on Surface Plasmon Resonance." Electronics 12, no. 12 (2023): 2655. http://dx.doi.org/10.3390/electronics12122655.

Full text

Abstract:

When surface plasmon resonance (SPR) occurs, the incident light is absorbed by the surface of the SPR structure, thus minimizing the intensity of the reflected light. Therefore, the SPR method is adopted in this paper to achieve perfect absorption of the absorbent. In this paper, we first propose a multi-frequency broadband absorber structure based on graphene SPR, which uses the continuous resonance of patterned graphene surface plasmon in the frequency spectrum to form a multi-frequency broadband absorption. In this simulation, a sandwich-stack structure was adopted, whereby the patterned gr

APA, Harvard, Vancouver, ISO, and other styles

46

Wang, Wenyu, Jian Xu, and Zhenzhan Wang. "Feasibility analysis of optimal terahertz (THz) bands for passive limb sounding of middle and upper atmospheric wind." Atmospheric Measurement Techniques 16, no. 17 (2023): 4137–53. http://dx.doi.org/10.5194/amt-16-4137-2023.

Full text

Abstract:

Abstract. As of now, direct measurements of middle and upper atmospheric wind are still scarce, and the observation method is limited, especially for the upper stratosphere and lower mesosphere. This paper presents a study of band selection to derive line-of-sight wind from 30 km to more than 120 km using a high-spectral-resolution terahertz (THz) radiometer, which can fill the measurement gap between lidar and interferometer data. Simulations from 0.1–5 THz for evaluating the feasibility of the spaceborne THz limb sounder are described in this study. The results show that high-precision wind

APA, Harvard, Vancouver, ISO, and other styles

47

Hamza, Musa N., Mohammad Tariqul Islam, Sunil Lavadiya, et al. "Ultra-compact quintuple-band terahertz metamaterial biosensor for enhanced blood cancer diagnostics." PLOS ONE 20, no. 1 (2025): e0313874. https://doi.org/10.1371/journal.pone.0313874.

Full text

Abstract:

Cancer and its diverse variations pose one of the most significant threats to human health and well-being. One of the most aggressive forms is blood cancer, originating from bone marrow cells and disrupting the production of normal blood cells. The incidence of blood cancer is steadily increasing, driven by both genetic and environmental factors. Therefore, early detection is crucial as it enhances treatment outcomes and improves success rates. However, accurate diagnosis is challenging due to the inherent similarities between normal and cancerous cells. Although various techniques are availab

APA, Harvard, Vancouver, ISO, and other styles

48

A., Elakkiya, Radha Sankararajan, Sreeja B.S., and Manikandan E. "Modified I-shaped hexa-band near perfect terahertz metamaterial absorber." Circuit World 46, no. 4 (2020): 281–84. http://dx.doi.org/10.1108/cw-11-2019-0155.

Full text

Abstract:

Purpose A novel and simple six-band metamaterial absorber is proposed in the terahertz region, which is composed of an I-shaped absorber and circular ring with four gaps and a continuous metal ground plane separated by only 0.125 mm polyimide dielectric substrate. Initially, I-shaped resonator gives three bands at 0.4, 0.468 and 0.4928 THz with the absorptivity of 99.3%, 97.9% and 99.1%, respectively. The purpose of this paper is to improve the number of bands, for which the authors added the circular ring with four gaps, so the simulated metamaterial absorber exhibited six absorption peaks at

APA, Harvard, Vancouver, ISO, and other styles

49

Aliqab, Khaled, Meshari Alsharari, Vishal Sorathiya, and Ammar Armghan. "A Numerical Investigation of Graphene-Based Hilbert-Shaped Multi-Band MIMO Antenna for the Terahertz Spectrum Applications." Sensors 23, no. 1 (2022): 37. http://dx.doi.org/10.3390/s23010037.

Full text

Abstract:

We proposed the numerical investigation of Hilbert-shaped multiple-input multi-output (MIMO) with multi-band operation characteristics using graphene resonator material, which operates on the band of 1 to 30 THz of the frequency range. This numerical investigation of antenna structure was carried out for the multiple antenna types, consisting of graphene as a regular patch, Hilbert order 1, and Hilbert order 2 designs. This antenna is investigated for the multiple physical parameters, such as return loss, gain, bandwidth, radiation response, Envelope Correlation Coefficient (ECC), Total Active

APA, Harvard, Vancouver, ISO, and other styles

50

Yan, Fei, Qi Li, Hao Hu, et al. "Terahertz high-Q magnetic dipole resonance induced by coherent Fano interactions." Applied Physics Letters 121, no. 20 (2022): 201704. http://dx.doi.org/10.1063/5.0112993.

Full text

Abstract:

High Q-factor resonance holds great promise for bio-chemical sensing and enhanced light–matter interaction. However, terahertz (THz) magnetic resonances usually demonstrate low Q-factors, resulting in huge energy radiation loss particularly in high frequency bands. Here, we show that high Q-factor magnetic dipole resonance at THz frequencies can be achieved by exploiting the coherent Fano interactions with strong field enhancements in an array composed of single metallic split-ring resonators, working at Wood–Rayleigh anomalies. It can give rise to ultrahigh Q-factor beyond 104 in the THz regi

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!