No abstract

Broadband and polarization-insensitive phase conjugation, achieved based on difference-frequency generation in a second-order nonlinear composite consisting of stacked KTiOPO(4) (KTP) plates, was exploited to restore blurred images due to phase distortion as a novel scheme. Due to the quasi-phase matching in the stacked KTP crystals, our result reveals that the image restoration is insensitive to the polarization direction and wavelength of the input beam.

No abstract

4-nitrophenol usually exists in soil and groundwater, which brings great harm to the environment and human health. So, removal of 4-nitrophenol becomes the focus of research. Herein, a smart synthetic...

This feature issue reports on the most recent advances in the field of III-V semiconductor lasers emitting in the near- to mid-IR spectral regions, with a particular focus on devices with an emission wavelength range between 1 and 13 μm.