Recent advances in controlling the optical phase at the sub-wavelength scale by meta-structures offer unprecedented possibilities in the beam engineering, holograms, and even invisible cloaks. In ...

Electrically pumped semiconductor lasers are among the most important sources owing to their high efficiency, compactness, and solid-state stability. For the mid-infrared and terahertz radiations, ...

After years of R&D and promises, multi-beam electron-beam technology is delayed and late to the market. The technology requires more funding and work than previously thought. And generally, the ...

Quantum technology has opened a whole new world of potential advances in secure communications, information technology and high precision sensors. This technology is poised to provide solutions to ...

Bessel beam is the important member of the family of non-diffracting beams and has many novel properties which can be used in many areas. However, the source of Bessel beam generated by the existing ...