Physics News

In the realm of lighting and temperature measurement, advancements in material science are paving the way for significant improvements in technology and safety. Traditional methods, which combine yellow phosphors with blue chips in LEDs, have limitations such as inadequate red light components that affect color rendering and potential hazards from blue light exposure.

A study led by researchers from the Changchun Institute of Optics, Fine Mechanics and Physics of the Chinese Academy of Sciences revealed a novel metal-dielectric film mode filter structure that can flexibly regulate transverse modes in vertical-cavity surface-emitting lasers (VCSELs), which demonstrates the potential of metal apertures in enhancing mode control within VCSELs. The study was published in Sensors.

Scientists use atomic clocks to measure the “second,” the smallest standard unit of time, with great precision. These clocks use natural oscillations of electrons in atoms, similar to how pendulums work in old grandfather clocks. The quest for an even more precise timekeeper led to the discovery of nuclear clocks, which use the transitions of atomic nuclei instead of electrons to keep time.

An international team of physicists has found that it is possible to generate spin currents directly using certain kinds of ultrashort laser pulses. In their study, published in the journal Physical Review Letters, the group used a linearly polarized laser pulse and a circularly polarized probe laser to create the spin currents.

Scientists have measured the magnetic moment of the muon to unprecedented precision, more than doubling the previous record.