Tag: Electromagnetic

Researchers Combine Lasers and Terahertz Waves In Camera That Sees ‘Unseen’ Detail

A team of physicists at the University of Sussex has successfully developed the first nonlinear camera capable of capturing high-resolution images of the interior of solid objects using terahertz (THz) radiation. Phys.Org reports: Led by Professor Marco Peccianti of the Emergent Photonics (EPic) Lab, Luana Olivieri, Dr. Juan S. Totero Gongora and a team of research students built a new type…

FCC Moves To Free Up Spectrum For Potential Cellphone Service

An anonymous reader quotes a report from The Wall Street Journal: The Federal Communications Commission will pay a group of satellite companies billions of dollars to upend their operations so a valuable swath of the radio spectrum can be used for cellphone service (Source: paywalled; alternative source), FCC Chairman Ajit Pai said. The telecom regulator said he plans to propose $3…

New multiplatform photon switch for application in quantum technology

An international team led by the Institute of Materials Science (ICMUV) of the University of Valencia has developed an optical (quantum) switch that modifies the emission properties of photons, the particles of electromagnetic radiation. The new device works with ultra-fast switching times and very low energy consumption and, in comparison to other designs, it can be implemented in a variety of…

Detection of Terahertz Magnetic Resonance Could Revolutionize Electronics

fahrbot-bot shares a report from Phys.Org: A team of physicists has discovered an electrical detection method for terahertz electromagnetic waves, which are extremely difficult to detect. The discovery could help miniaturize the detection equipment on microchips and enhance sensitivity. The finding, reported today in Nature, is based on a magnetic resonance phenomenon in anti-ferromagnetic materials. Such materials, also called antiferromagnets, offer…

Blazar variability

Active galactic nuclei (AGN) are supermassive black holes at the centers of galaxies that are accreting material. These AGN emit jets of charged particles that move at speeds close to that of light, transporting huge amounts of energy away from the central black hole region and radiating across the electromagnetic spectrum. Blazars are extreme examples of AGN in which the collimated…

‘Tweezer clock’ may help tell time more precisely

Atomic clocks are used around the world to precisely tell time. Each “tick” of the clock depends on atomic vibrations and their effects on surrounding electromagnetic fields. Standard atomic clocks in use today, based on the atom cesium, tell time by “counting” radio frequencies. These clocks can measure time to a precision of one second per every hundreds of millions of…

Worried About 5G’s Health Effects? Don’t Be

There are real concerns about the way 5G is being deployed in the US, including security issues, the potential to interfere with weather forecasting systems, and the FCC steamrolling local regulators in the name of accelerating the 5G rollout. But concerns over the potential health impacts of 5G are overblown. From a report: If you weren’t worried about prior generations of…

(Noise)less is more

A group of researchers from Osaka University led by Prof. Masayuki Abe and Prof. Hiroshi Toki of the Graduate School of Engineering Science developed a high precision 3-D circuit simulator in the time-domain for quantifying electromagnetic (EM) noise and elucidated its origin, allowing for electronic and electrical circuit layout to reduce EM noise. …

Gamma-ray binary HESS J0632+057 contains a pulsar, study suggests

Using NuSTAR spacecraft and the VERITAS array of telescopes, an international team of astronomers has investigated a gamma-ray binary known as HESS J0632+057. The study found that a compact object in this system is most likely a pulsar—a highly magnetized, rotating neutron star emitting beams of electromagnetic radiation. The finding is reported in a paper published November 21 on arXiv. Source:…