Scientists at Northumbria University have made a breakthrough in developing a new type of ‘microwave amplification by stimulated emission of ...

Tasers have become an increasingly popular choice by law enforcement, and can even be owned and used by civilians, but not everywhere.

Their emitted photons sometimes hit an already-excited atom, leading to an avalanche of stimulated emission radiation (the SER of LASER) in one direction.

A schematic view of the pump-induced stimulated superradiant Smith-Purcell radiation (PIS-SPR) device, which consists of the electron pre-bunching, electron-compression and harmonic-emission section.

Here, we employ Radiofrequency Amplification by Stimulated Emission of Radiation (RASER), a quantum phenomenon producing coherent emission of 13 C signals, to detect chemical transformations.

The U.S. Patent Office has issued millions of patents for a near-endless number of inventions. Here are 10 that made a lot of ...

Under the right conditions, some molecules can supercharge light. After their electrons absorb a photon, they can take that energy and combine it with the energy of another similarly excited ...

Currently, the maximum aperture of titanium:sapphire crystals can only support 10-petawatt lasers. Even with larger titanium:sapphire crystals, laser amplification is still not possible because ...

We experimentally demonstrate terahertz light amplification by instability-driven stimulated emission of graphene plasmon polaritons in an asymmetric dual-grating-gate transistor structure. D.C.

The gapless and linear energy spectra of electrons and holes in graphene lead to nontrivial features such as negative dynamic conductivity in the terahertz spectral range. This paper reviews recent ...