For the first time, researchers at Umeå University have demonstrated the full capabilities of their large-scale laser facility. In a study published in Nature Photonics, the team reports generating a combination of ultrashort laser pulses, extreme peak power, and precisely controlled waveforms that make it possible to explore the fastest processes in nature.
An international team of scientists led by Nanyang Technological University, Singapore (NTU Singapore) has developed a new type of ultracompact laser that is more energy efficient and consumes less power.
Smaller than a grain of sand, the micrometer-sized laser incorporates a special design that reduces light leakage. Minimizing light loss means less energy is required to operate the laser compared to other highly compact lasers.
The laser emits light in the terahertz region (30 μm—3 mm), a 6G communications frequency, and could pave the way for high-speed wireless communication of the future.
The ability to move electron-hole pairs—called excitons—in desired directions is important for generating electricity and creating fuels. This happens naturally in photosynthesis, making it a source of inspiration to researchers innovating optoelectronic devices.
Strong coupling between light and excitons generates bosonic quasiparticles called polaritons that express unique properties that positively affect device performance.
Researchers observed steady-state hyperbolic exciton polaritons (HEPs)—exotic kinds of exciton polaritons with attractive properties—in the van der Waals magnet, chromium sulfide bromide (CrSBr).
In Associate Professor Jonathan Boreyko’s Nature-Inspired Fluids and Interfaces Lab, Ph.D. student Jack Tapocik watched a disk-shaped chunk of ice resting on an engineered metal surface. As the ice melted, the water formed a puddle beneath.
Even after many seconds of melting, the ice disk remained adhered to the engineered surface. At first, Tapocik was tempted to conclude that nothing would happen, but he waited. His patience paid off. After a minute, the ice slingshot across the metal plate he designed, gliding along as if it was propelled supernaturally.
The results are important because they have a host of potential applications. The methods team members developed lay the foundation for rapid defrosting and novel methods of energy harvesting. Their work has been published in ACS Applied Materials & Interfaces.
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Boston-based aerospace manufacturer Spike Aerospace says it has reached a new stage in developing its flagship supersonic business jet, the Spike S-512 Diplomat, which the company claims will offer fast, quiet, and fuel-efficient travel over land and water.
The Massachusetts-based aerospace firm announced Wednesday that it is completing an advanced design study to refine the S-512’s aerodynamics, cabin configuration, and low-boom capabilities.
A research team from the Yunnan Observatories of the Chinese Academy of Sciences has shed new light on the magnetic reconnection process driven by rapidly expanding plasma, using magnetohydrodynamic (MHD) numerical simulations. Their findings, published recently in Science China Physics, Mechanics & Astronomy, reveal previously unobserved fine structures and physical mechanisms underlying this fundamental phenomenon.
Magnetic reconnection—a process where magnetic field lines break and rejoin, releasing massive energy—is critical to understanding explosive events in plasmas, from laboratory experiments to solar flares and space weather.
The team focused on how this process unfolds under rapid driving conditions, examining three distinct reconnection modes: flux pile-up, Sonnerup, and hybrid. These modes, they found, arise from variations in gas pressure and magnetic field strength within the inflow region, where plasma is drawn into the reconnection site.
