11/07/2022

Boosting second harmonic generation with TMDs monolayer

Two photons can be merged to generate one photon with doubled frequency in nonlinear optical materials. This process is known as second harmonic generation (SHG), which was first discovered in 1960s, immediately after the ...

Breakthrough in study of how epithelial cells become cancerous

Epithelial cells, which line the surfaces and organs of the body, can protect themselves against cancer by removing unhealthy or abnormal cells through a mechanism known as "apical extrusion," where the damaged cells are ...

Image: Hubble spots a merging galactic gem

This NASA/ESA Hubble Space Telescope observation has captured the galaxy CGCG 396-2, an unusual multi-armed galaxy merger which lies around 520 million light-years from Earth in the constellation Orion.

How red flag laws reduce risk of gun violence

When it comes to gun control measures, temporarily restricting access to firearms for people at a high risk for committing violence is one way to reduce harm. In many states, however, there are only limited legal options ...

Nanoparticles can save historic buildings made from porous rock

Many historical buildings were built of sandstone, including Vienna's St. Stephen's Cathedral. Sandstone is easy to work with, but does not withstand weathering. It consists of sand grains that are relatively weakly bonded ...

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