A power blackout has hit all of Puerto Rico as the heavily Catholic U.S. territory prepares to celebrate the Easter weekend ...

Physicists have created a compact laser that emits extremely bright, short pulses of light in a useful but difficult-to-achieve wavelength range, packing the performance of larger photonic devices ...

Physicists at Harvard have developed a powerful new laser-on-a-chip that emits bright pulses in the mid-infrared spectrum – ...