Search results for electromagnetic fields

Nanophysics Feb 26, 2026

A new, useful absorption limit for ultra-thin films

Ultrathin, conductive films such as those made of graphene are widely used in modern optoelectronic devices, but it has been thought that their efficacy is fundamentally limited: they can absorb at most half of the incident ...

Planetary Sciences Feb 23, 2026

Auroras on Ganymede and Earth share striking similarities

New observations of Ganymede reveal a striking similarity between the auroras on the largest moon in the solar system and those on Earth. The international team of astrophysicists, led by researchers from the University of ...

Astronomy Feb 20, 2026

The persistence of gravitational wave memory

Neutron stars are ultra-dense remnants of massive stars that collapsed after supernova explosions and are made up mostly of subatomic particles with no electric charge (i.e., neutrons). When two neutron stars collide, they ...

Condensed Matter Feb 19, 2026

Next-generation OLEDs rely on fine-tuned microcavities

Researchers have developed a unified theory of microcavity OLEDs, guiding the design of more efficient and sustainable devices. The work reveals a surprising trade-off: squeezing light too tightly inside OLEDs can actually ...

Astronomy Feb 19, 2026

Could a recently reported high-energy neutrino event be explained by an exploding primordial black hole?

The KM3NeT collaboration is a large research group involved in the operation of a neutrino telescope network in the deep Mediterranean Sea, with the aim of detecting high-energy neutrino events. These are rare and fleeting ...

Nanophysics Feb 17, 2026

Tuned nanocrystals speed light-driven reactions by matching molecular vibrations

Adjusting the size and chemistry of nanocrystals within an ultrathin surface can speed up light-driven chemical reactions, according to a University of Michigan Engineering study published in the Journal of the American Chemical ...

Optics & Photonics Feb 17, 2026

Quantum sensor research advances the pursuit of dark matter

Researchers at the Department of Energy's Oak Ridge National Laboratory are helping to pave a path for the eventual discovery of dark matter. With new approaches to measurement in the quantum realm, using quantum optical ...

Astronomy Feb 15, 2026

How a certain form of dark matter may lead to the generation of cosmological magnetic fields

Tiny highly uniform magnetic fields are known to pervade the universe, influencing various cosmological processes. To date, however, the physical mechanisms underpinning the generation of these fields remain poorly understood. ...

Nanomaterials Feb 13, 2026

Shaping carbon fiber with electricity: Wireless voltage pulses drive reversible bending

Controlled manipulation of fibers that are as thin as or even thinner than human hair is a real challenge. Despite technological development, the precise and reversible change of the microfibers' orientation is not easy. ...

Astronomy Feb 12, 2026

Gravitational lensing technique unveils supermassive black hole pairs

Supermassive black hole binaries form naturally when galaxies merge, but scientists have only confidently observed a very few of these systems that are widely separated. Black hole binaries that closely orbit each other have ...

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