A Time-Reversed Laser

A metamaterial designed to absorb all light of a specific color demands the waves be synchronized as well

A Chip-Based Nonmechanical Beam Steerer

The new devices provide steering in two dimensions without relying on moving parts

Terahertz Pulses Amplify Optical Phonons

Analogies between phonons and photons pave the way for phononic devices

Narrowing the Spectrum of Diode Lasers

A useful replacement for the more complex single-frequency lasers is possible

Optical Centrifuges for Superrotors

Novel corkscrew-laser technique can send molecules spinning rapidly about a selected axis

Absolute Duration of the Photoelectric Effect

The photoemission from the tungsten conduction band can proceed faster than previously anticipated

Smart Mirror for a Radiation-Pressure Power Meter

New chip-sized device could help manufacturers measure laser power in real time.

Metamaterial for Ultrathin Optical Cavities

Embedded silver metasurfaces in nanocavities for ultrathin and multicolor on-a-chip lasers

Twisting Light into Knots

Knotted polarization singularities endows a topological structure on the propagating wavefield

New Nanoscale Light Switch

New method enables transmission of specific colors of light over long distances