When world-leading teams join forces, new findings are bound to be made. This is what happened when quantum physicists from ...

For almost a century, measurements have indicated that a significant proportion of matter in the universe consists of unknown dark matter, which ...

For almost a century, measurements have indicated that a significant proportion of matter in the universe consists of unknown ...

Phase transitions, shifts between different states of matter, are widely explored physical phenomena. So far, these ...

Abstract: We propose and experimentally demonstrate a terahertz (THz) source based on optical rectification in lithium niobate wafers driven by an ultrafast ytterbium laser. Terahertz pulses with a ...

compared with 1.2 eV in ytterbium-doped solids. Weighing against this advantage are two other considerations. First is the choice of the pump laser, with fewer sources readily available near 0.6 eV.

and ytterbium (blue) ions. Credit: Physikalisch-Technische Bundesanstalt Breakthrough Optical Atomic Clock Sets New Accuracy Record in Quest to Redefine the Second The next generation of atomic clocks ...

If the laser has exactly the right frequency ... “We use indium ions because of their favorable properties for achieving high levels of accuracy. Ytterbium ions are also added to the crystal for ...

If the laser is tuned to the right frequency ... “We use indium ions, as they have favorable properties, to achieve high accuracy. For efficient cooling, ytterbium ions are added to the crystal.” One ...

Credit: Chinese Academy of Sciences HELSINKI — China could look to laser power transmission from lunar orbit to supply spacecraft on the moon and solve one of the big challenges for its lunar ...