Home Tags Toilet paper

Tag: toilet paper

Amplifier for terahertz lattice vibrations in a semiconductor crystal

In analogy to the amplification of light in a laser, vibrations of a semiconductor crystal, so called phonons, were enhanced by interaction with an...

US mayors warn their cities are being overwhelmed

US mayors warned on Sunday that their cities were in danger of being overwhelmed by a surge in covid-19 cases as they pushed back...