Optical antennas transform light from freely propagating waves into highly localized excitations that interact strongly with matter. Unlike their radio frequency counterparts, optical antennas are ...

Ultrafast extreme ultraviolet (XUV) spectroscopy is a powerful technique for probing the dynamics of atoms and molecules with attosecond time resolution. However, conventional XUV absorption ...

Plasmon-enhanced molecular spectroscopies have attracted tremendous attention as powerful detection tools with ultrahigh sensitivity down to the single-molecule level. The optical response of ...

Atoms emit unique light wavelengths when electrons change energy levels. A star's temperature and composition are revealed by its light spectrum. Strongest hydrogen lines appear in stars around 10,000 ...

Continuous-wave optical parametric oscillators emitting multiple watts of output power in the near- to mid-infrared are now a commercial reality. Angus Henderson of Aculight discusses the technical ...