The promise of a quantum internet depends on the complexities of harnessing light to transmit quantum information over fiber optic networks. A potential step forward was reported today by researchers in Sweden who developed ...
Quantum Physics
May 10, 2021
0
32
Vaccines are currently a great source of hope for many people, as it is believed they will help to protect society against COVID-19 and pave the way back to a normal life. The current focus is clearly on coronavirus—but ...
Cell & Microbiology
May 06, 2021
0
5
"Image" is everything in the $20 billion market for AR/VR glasses. Consumers are looking for glasses that are compact and easy to wear, delivering high-quality imagery with socially acceptable optics that don't look like ...
Optics & Photonics
May 03, 2021
2
869
Tungsten has the highest melting point of all metals, 3,422 degrees Celsius. This makes the material ideal for use at high temperatures in e.g. space rocket nozzles, heating elements of high-temperature furnaces, or the fusion ...
Materials Science
Apr 30, 2021
1
14
Since the beginning of civilization, humans have exploited new materials to improve their lives, from the prehistoric Stone Age, Bronze Age, and Iron Age to the modern Silicon Age. With each period came technological breakthroughs ...
Analytical Chemistry
Apr 23, 2021
0
14
Oak Ridge National Laboratory scientists proved molybdenum titanium carbide, a refractory metal alloy that can withstand extreme temperature environments, can also be crack free and dense when produced with electron beam ...
Materials Science
Apr 06, 2021
0
11
Researchers at Delft University of Technology (TU Delft) have expanded upon a clever trick and increased the speed of electron microscope imaging by a factor of 20. A simple adjustment is all that is needed: applying a voltage ...
Analytical Chemistry
Mar 30, 2021
0
11
Imagine a cube on which light is projected by a flashlight. The cube reflects the light in a particular way, so simply spinning the cube or moving the flashlight makes it possible to examine each aspect and deduce information ...
Nanophysics
Mar 25, 2021
0
154
Beams of accelerated electrons power electron microscopes, X-ray lasers, medical accelerators and other devices. To optimize the performance of these applications, operators must be able to analyze the quality of the beams ...
General Physics
Mar 24, 2021
0
178
Seeded free-electron lasers (FELs), which use frequency up-conversion of an external seed laser to improve temporal coherence, are considered ideal for supplying stable, fully coherent, soft X-ray pulses. However, the requirement ...
Optics & Photonics
Mar 11, 2021
0
0
Cathode rays (also called an electron beam or e-beam) are streams of electrons observed in vacuum tubes, i.e. evacuated glass tubes that are equipped with at least two metal electrodes to which a voltage is applied, a cathode or negative electrode and an anode or positive electrode. They were discovered by German scientist Johann Hittorf in 1869 and in 1876 named by Eugen Goldstein kathodenstrahlen (cathode rays). Electrons were first discovered as the constituents of cathode rays. In 1897 British physicist J. J. Thompson showed the rays were composed of a previously unknown negatively charged particle, which was named electron.
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