Current Terahertz News and Events

Current Terahertz News and Events, Terahertz News Articles.
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Terahertz imaging of graphene paves the way to industrialisation
X-ray scans revolutionised medical treatments by allowing us to see inside humans without surgery. Similarly, terahertz spectroscopy penetrates graphene films allowing scientists to make detailed maps of their electrical quality, without damaging or contaminating the material. The Graphene Flagship brought together researchers from academia and industry to develop and mature this analytical technique, and now a novel measurement tool for graphene characterisation is ready. (2021-02-23)

Novel flexible terahertz camera can inspect objects with diverse shapes
Scientists at Tokyo Institute of Technology (Tokyo Tech) and RIKEN have developed a flexible, free-standing, and versatile terahertz (THz) camera patch. This novel camera overcomes the limitations of the conventional THz cameras that are bulky and rigid. With its high sensitivity, adaptability, and ease of filming irregularly shaped objects, it is a potential tool for effective quality control of complex devices. (2021-02-16)

THz spectroscopy tracks electron solvation in photoionized water
''This work provides insights on the fundamental aspects of the charge transport process in water and lays a foundation for further understanding of the physicochemical properties and transient evolution of femtosecond-laser-pulse-excited plasma in water.'' (2021-02-09)

Scientists measure spectral line of Cherenkov radiation in radiant regime
The scientists of Tomsk Polytechnic University jointly with the colleagues from Keysight company have conducted an experiment with an electron beam at the TPU microtron to study a super-radiant regime that occurs when radiation is generated by a train of electron bunches. The research findings obtained by a high-precision measurement of a spectral line width proved that about 8,000 electron bunches in a super-radiant regime form monochromatic Cherenkov radiation. This experiment was conducted for the first time. (2021-02-07)

Quantum tunneling in graphene advances the age of terahertz wireless communications
Scientists from MIPT, Moscow Pedagogical State University and the University of Manchester have created a highly sensitive terahertz detector based on the effect of quantum-mechanical tunneling in graphene. The sensitivity of the device is already superior to commercially available analogs based on semiconductors and superconductors, which opens up prospects for applications of the graphene detector in wireless communications, security systems, radio astronomy, and medical diagnostics. (2021-02-03)

Advanced measurement technology for future semiconductor devices
A team of researchers led by Osaka University investigated beta-gallium oxide (╬▓-Ga2O3), an emerging semiconductor for next-generation power devices, using an advanced method involving terahertz waves -- the technology that could replace conventional yet invasive electrical semiconductor characterizations. (2021-01-25)

Electrons caught in the act
Tsukuba University scientists create movies of the ultrafast motion of electrons traveling through an organic semiconductor with atomic-level resolution. This work may lead to more powerful and miniaturized smart devices. (2021-01-21)

Light-induced twisting of Weyl nodes switches on giant electron current
Scientists at the U.S. Department of Energy's Ames Laboratory and collaborators at Brookhaven National Laboratory and the University of Alabama at Birmingham have discovered a new light-induced switch that twists the crystal lattice of the material, switching on a giant electron current that appears to be nearly dissipationless. (2021-01-19)

Light-controlled Higgs modes found in superconductors; potential sensor, computing uses
Iowa State University's Jigang Wang and a team of researchers have discovered a short-lived form of the famous Higgs boson -- subject of a groundbreaking search at the Large Hadron Collider -- within an iron-based superconductor. This Higgs mode can be accessed and controlled by laser light flashing on the superconductor at trillions of pulses per second. (2021-01-19)

Super surfaces
Assembling tiny chips into unique programmable surfaces, Princeton researchers have created a key component toward unlocking a communications band that promises to dramatically increase the amount data wireless systems can transmit. (2021-01-04)

Comb of a lifetime: a new method for fluorescence microscopy
Conventional fluorescence microscopy provides poor quantitative information of the sample because it only captures fluorescence intensity, which changes frequently and depends on external factors. Now, scientists from Japan have developed a new fluorescence microscopy technique to measure both fluorescence intensity and lifetime. Their method does not require mechanical scanning of a focal point; instead, it produces images from all points in the sample simultaneously, enabling a more quantitative study of dynamic biological and chemical processes. (2021-01-01)

Power boost thanks to gold lamellae
Terahertz light holds enormous potential for tomorrow's technologies. It might succeed 5G by enabling extremely fast mobile communications connections and wireless networks. The bottleneck in the transition from gigahertz to terahertz frequencies has been caused by insufficiently efficient sources and converters. A research team with the participation of HZDR has now developed a material system to generate terahertz pulses much more effectively than before. It is based on graphene, coated with a metallic lamellar structure. (2020-12-18)

How water helps the substrate into the enzyme
Researchers from Bochum and Berkeley have investigated why cages can increase the catalytic activity of enclosed molecules. Using terahertz spectroscopy and complex computer simulations, they showed that water encapsulated in a tiny cage has special properties - that are structurally and dynamically distinct from any known phase of water. The water forms a droplet inside the cage that facilitates the encapsulation of a host molecule, i.e. to access the catalytic centre. (2020-12-15)

T-ray technology reveals what's getting under your skin
A new method for analysing the structure of skin using a type of radiation known as T-rays could help improve the diagnosis and treatment of skin conditions such as eczema, psoriasis and skin cancer. (2020-11-26)

Towards 6G wireless communication networks: vision, enabling technologies, and new paradigm shifts
Recently, a long-form review titled ''Towards 6G wireless communication networks: vision, enabling technologies, and new paradigm shifts'' was published in SCIENCE CHINA Information Sciences Vol. 64, No.1. This article, co-authored by 50 researchers from 24 scientific research institutes, colleges, and companies both at home and abroad, provides a comprehensive survey of the latest progress and developmental trends about 6G networks. (2020-11-25)

Researchers find conformational disorder tuning charge carrier mobility in 2D perovskites
Researchers from the University of Science and Technology of China synthesized a series of 2D organic-inorganic hybrid perovskites films with large organic spacer cations, and found that mobility and broadband emission showed strong dependence on the molecular conformational order of organic cations. (2020-11-23)

Researchers develop a high-power, portable terahertz laser
Researchers at MIT and the University of Waterloo have developed a high-power, portable version of a device called a quantum cascade laser, which can generate terahertz radiation outside of a laboratory setting. The laser could potentially be used in applications such as pinpointing skin cancer and detecting hidden explosives. (2020-11-02)

Tunable THz radiation from 3D topological insulator
Wu's research group has been investigating a three-dimensional topological insulator of bismuth telluride (Bi2Te3) as a promising basis for an effective THz system. They recently systematically investigated THz radiation from Bi2Te3 nanofilms driven by femtosecond laser pulses. (2020-11-02)

No stain? No sweat: Terahertz waves can image early-stage breast cancer without staining
A team of researchers at Osaka University, in collaboration with the University of Bordeaux and the Bergoni├ę Institute in France, has succeeded in terahertz imaging of early-stage breast cancer less than 0.5 mm without staining. Differences in terahertz intensity distributions also suggest the possibility of quantitative determination of cancer malignancy. Their work provides a breakthrough towards rapid and precise on-site diagnosis of various types of cancer and accelerates the development of innovative terahertz diagnostic devices. (2020-10-20)

A trillion turns of light nets terahertz polarized bytes
Nanophotonics researchers at Rice University, the Polytechnic University of Milan and the Italian Institute of Technology have demonstrated a novel technique for modulating light at terahertz frequencies with plasmonic metasurfaces. (2020-10-19)

Finding the right colour to control magnets with laser pulses
Scientists have discovered a new way to manipulate magnets with laser light pulses shorter than a trillionth of a second. The international team of researchers, led by Lancaster and Radboud Universities, also identified the light wavelength or colour which enables the most efficient manipulation. The finding is published in Physical Review Letters. (2020-10-12)

Terahertz zaps alter gene activity in stem cells
Terahertz light pulses change gene expression in stem cells, report researchers from Kyoto University's Institute for Integrated Cell-Material Sciences (iCeMS) and Tokai University in Japan in the journal Optics Letters. The findings come thanks to a new tool, with implications for stem cell research and regenerative therapy development. (2020-10-08)

Graphene detector reveals THz light's polarization
Physicists have created a broadband detector of terahertz radiation based on graphene. The device has potential for applications in communication and next-generation information transmission systems, security and medical equipment. (2020-10-08)

Potential new tool for frost screening in crops
Agricultural scientists and engineers at the University of Adelaide have identified a potential new tool for screening cereal crops for frost damage. (2020-10-02)

First observation of nutation in magnetic materials
An international team of scientists has managed for the first time to observe the 'nutation' of spins in magnetic materials (the oscillations of their axis during precession). The measured nutation period was of the order of one picosecond. The discovery was published by Nature Physics (2020-09-29)

SLAC invention could make particle accelerators 10 times smaller
A team led by scientists at the Department of Energy's SLAC National Accelerator Laboratory has invented a new type of accelerator structure that could make accelerators used for a given application 10 times shorter. (2020-09-23)

Development of high-sensitivity, wide-IF band heterodyne receiver in THz frequency range
The National Institute of Information and Communications Technology has developed a unique superconducting hot electron bolometer mixer (HEBM) using magnetic materials. The 2 THz band HEBM produced this time has a low noise performance of about 570 K (DSB), which is about 6 times the quantum noise limit, and a wide IF band characteristic of about 6.9 GHz, which is about 3 GHz larger than the conventional structure HEBM. Both of these are world-class performance. (2020-09-18)

Shining a light on disordered and fractal systems
A research team led by the University of Tsukuba investigated the acoustic properties of disordered lysozyme proteins by using terahertz spectroscopy. They found that the fractal nature of the proteins is responsible for its unusually large vibrations at low frequencies, which may lead to a better theory for disordered materials. (2020-09-14)

Terahertz receiver for 6G wireless communications
Future wireless networks of the 6th generation (6G) will consist of a multitude of small radio cells that need to be connected by broadband communication links. In this context, wireless transmission at THz frequencies represents a particularly attractive and flexible solution. Researchers at Karlsruhe Institute of Technology (KIT) have now developed a novel concept for low-cost terahertz receivers. The results are reported in Nature Photonics (DOI: 10.1038/s41566-020-0675-0) (2020-09-08)

Scientists uncover secret of material for promising thermal imagers
Russian researchers have discovered what makes vanadium dioxide films conduct electricity. Published in Physical Review B, their findings will enable thermal imaging devices with a sensitivity and reaction rate superior to those of the currently existing analogues. (2020-09-07)

Paving the way for tunable graphene plasmonic THz amplifiers
Tohoku University Professor Taiichi Otsuji has led a team of international researchers in successfully demonstrating a room-temperature coherent amplification of terahertz (THz) radiation in graphene, electrically driven by a dry cell battery. (2020-09-07)

Strong fields and ultrafast motions - how to generate and steer electrons in liquid water
Water molecules undergo ultrafast dithering motions at room temperature and generate extremely strong electric fields in their environment. New experiments demonstrate how in presence of such fields free electrons are generated and manipulated in the liquid with the help of an external terahertz field. (2020-09-02)

New method to track ultrafast change of magnetic state
An international team of physicists from Bielefeld University, Uppsala University, the University of Strasbourg, University of Shanghai for Science and Technology, Max Planck Institute for Polymer Research, ETH Zurich, and the Free University Berlin have developed a precise method to measure the ultrafast change of a magnetic state in materials. Their study, titled 'Ultrafast terahertz magnetometry', has been published today (25.08.2020) in Nature Communications. (2020-08-25)

A powder method for the high-efficacy measurement of electro-optic coefficients
A high-efficacy powder method, combining calculations and measurements on powder second harmonic generation (SHG) effect, infrared reflectance spectrum (IRRS), and Raman spectrum, is put forward for the evaluation and exploration of novel electro-optic crystals. (2020-08-21)

Ultrafast hydrogen bond dynamics of liquid water revealed by THz-induced Kerr effect
Hydrogen bond dynamics in water has always been mysterious, and it is the basis for understanding the behavior of matter in the water environment. Chinese scientists found that applying a broadband terahertz pulse to a free-flowing water film will enhance the relatively weak intermolecular hydrogen bond motion, allowing us to observe ultrafast vibration characteristics on the order of sub-picoseconds. This method can be used to study the complex interaction of reagents with solvent water molecules. (2020-08-18)

ETRI develops eco-friendly color thin-film solar cells
Research on solar cells to secure renewable energy sources are ongoing around the world. The Electronics and Telecommunications Research Institute (ETRI) in South Korea succeeded in developing eco-friendly color Cu(In,Ga)Se2 (CIGS) thin-film solar cells. (2020-07-31)

Thermal manipulation of plasmons in atomically thin films
Nanoscale photothermal effects can induce substantial changes in the optical response experienced by the probing light, thus suggesting their applications in all-optical light modulation. By exploiting nanosystems composed of graphene or ultrathin metal films, ultrafast laser pumps can be used to raise the electron temperature of graphene during a picosecond timescale, in which its surface conductivity undergoes dramatic temperature-dependent variations. Consequently, the spectral response of plasmonic modes supported in the nanosystems is severely modified. (2020-07-21)

Underused part of the electromagnetic spectrum gets optics boost from metamaterial
Terahertz radiation, or T-rays, has barely been exploited compared to most of the rest of the electromagnetic spectrum. Yet T-rays potentially have applications in next-generation wireless communications (6G/7G), security systems, biomedicine, and even art history. A new device for controlling T-rays using a specially designed 'metasurface' with properties not found in nature could begin to realize this potential. (2020-07-14)

T-ray camera speed boosted a hundred times over
Scientists are a step closer to developing a fast and cost effective camera that utilises terahertz radiation, potentially opening the opportunity for them to be used in non-invasive security and medical screening. (2020-07-10)

Spintronics: Faster data processing through ultrashort electric pulses
Physicists at Martin Luther University Halle-Wittenberg (MLU) and Lanzhou University in China developed a simple concept that could improve significantly magnetic-based data processing. Using ultrashort electric pulses in the terahertz range, data can be written, read and erased very quickly. This would make data processing faster, more compact and energy efficient. The researchers confirmed their theory by running complex simulations and the results were published in the journal NPG Asia Materials. (2020-07-02)

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