Authors: George Rajna
Scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory have developed a new approach to 3-D x-ray imaging that can visualize bulky materials in great detail—an impossible task with conventional imaging methods.  In a recent study featured on the March 2018 cover of Nature Photonics, researchers developed a new holographic method called in-flight holography. With this method, they were able to demonstrate the first X-ray holograms of nano-sized viruses that were not attached to any surface.  A paper published in the journal Physical Review X presents evidence of a radiation reaction occurring when a high-intensity laser pulse collides with a high-energy electron beam.  Researchers from Würzburg and London have succeeded in controlling the coupling of light and matter at room temperature.  Researchers have, for the first time, integrated two technologies widely used in applications such as optical communications, bio-imaging and Light Detection and Ranging (LIDAR) systems that scan the surroundings of self-driving cars and trucks.  The unique platform, which is referred as a 4-D microscope, combines the sensitivity and high time-resolution of phase imaging with the specificity and high spatial resolution of fluorescence microscopy.  The experiment relied on a soliton frequency comb generated in a chip-based optical microresonator made from silicon nitride.  This scientific achievement toward more precise control and monitoring of light is highly interesting for miniaturizing optical devices for sensing and signal processing.  It may seem like such optical behavior would require bending the rules of physics, but in fact, scientists at MIT, Harvard University, and elsewhere have now demonstrated that photons can indeed be made to interact-an accomplishment that could open a path toward using photons in quantum computing, if not in light sabers.  Optical highways for light are at the heart of modern communications. But when it comes to guiding individual blips of light called photons, reliable transit is far less common.  Theoretical physicists propose to use negative interference to control heat flow in quantum devices. 
Comments: 67 Pages.
[v1] 2018-08-25 04:29:47
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