ScienceAugust 14, 2026
photoemission
foh-toh-ih-MISH-un
Definition
The process by which electrons are ejected from a material's surface when it is struck by electromagnetic radiation, such as photons.
Etymology
Derived from the Greek 'phōs' (light) combined with the Latin 'emittere' (to send out), reflecting the scientific principle of using light to trigger the release of particles.
In the news
In this article, researchers use a technique called ARPES, which relies on photoemission to knock electrons out of a material to map their energy and movement.
Electrons Mysteriously Slow to a Crawl Inside This Magnetic Material
Read the full article ↗SciTechDaily