From the Editor
Search and Discovery
With the right dimensions, a laser composed of a series of quantum wells emits hard-to-produce terahertz-frequency light without the usual need for cryogenic cooling.
Observations at multiple wavelengths provide compelling evidence that the first example of a fast radio burst detected in our galaxy came from a magnetized neutron star.
New simulations reveal that much of Earth’s ambient seismic wave field arises from interactions with the planet’s interior.
Issues and Events
Funding across scientific disciplines could catalyze US competitiveness.
Caused by simple fluctuations in space, the Casimir effect may validate theories of the cosmological constant and allow for measurements of ultrasmall magnetic fields.
The hues of blue birds come from constructive interference, but scattering and refraction also matter.