Excitons—bound pairs of electrons and an electron hole—are quasiparticles that can arise in solids. While so-called "bright" ...

Hollow atoms are special atoms with multiple missing electrons in their inner shells, while their outer shells are still ...

R-band backward wave oscillator (BWO) based on metamaterial (MTMs) and Multi-electron Beams is presented as a novel high-power terahertz radiation source. We analyzed and retrieved the effective ...

This work presents the first room temperature operation of GaAs based ridge waveguide semiconductor lasers containing lithographically defined InGaAs quantum dots as the active region. Semiconductor ...