Unlike fictional laser swords, real laser beams do not interact with each other when they cross—unless the beams meet within a suitable material allowing for nonlinear light-matter interaction. In such a case, wave mixing ...
Optics & Photonics
May 20, 2022
2
295
For the first time, researchers have used liquid crystals to create a flat magic window—a transparent device that produces a hidden image when light shines on it. The technology represents a new twist on a very old light ...
Optics & Photonics
May 5, 2022
0
502
Shine a flashlight into a murky pond water and the beam won't penetrate very far. Absorption and scattering rapidly diminishes the intensity of the light beam, which loses a fixed percentage of energy per unit distance traveled. ...
Nanophysics
Apr 21, 2022
0
169
Researchers have developed a new measurement and imaging approach that can resolve nanostructures smaller than the diffraction limit of light without requiring any dyes or labels. The work represents an important advance ...
Optics & Photonics
Apr 21, 2022
0
168
A breakthrough in quantum imaging could lead to the development of advanced forms of microscopy for use in medical research and diagnostics.
Optics & Photonics
Apr 12, 2022
0
182
Water whirlpools, smoke rings, violent tornados and spiral galaxies are all examples of twists in fluids, although very different each other. Analogous twists, but in the realm of light, have been created by the research ...
Optics & Photonics
Apr 11, 2022
0
139
Electron microscopy enables researchers to visualize tiny objects such as viruses, the fine structures of semiconductor devices, and even atoms arranged on a material surface. Focusing down the electron beam to the size of ...
Optics & Photonics
Apr 11, 2022
1
223
The safety glass used in the windshields of limousines and military vehicles needs to be hard, strong and shatter-proof, but also thin—both for visibility and to reduce its weight, a particularly important feature for aerospace ...
Nanophysics
Mar 31, 2022
0
23
A research team reported the direct measurement of dielectric tensors of anisotropic structures including the spatial variations of principal refractive indices and directors. The group also demonstrated quantitative tomographic ...
Optics & Photonics
Mar 22, 2022
0
58
Holograms are three-dimensional (3D) images produced by interfering beams of light that reflect physical objects or photographs. In recent years, they were introduced in a variety of settings, for instance to enhance employee ...
