An international research team has for the first time designed realistic photonic time crystals ---- exotic materials that exponentially amplify light. The breakthrough opens up exciting possibilities ...

During femtosecond laser fabrication, photons are mainly absorbed by electrons, and the subsequent energy transfer from electrons to ions is of picosecond order. Hence, lattice motion is negligible ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› by Rachel Cericola A good home security system should make it easy to find peace ...