In Star Trek, the crew of the Aggressive spacecraft often use traction beams to rescue a friendly spacecraft that is in distress or to capture enemy spacecraft. According to foreign media reports, two physicists at New York University, Professor David Greer and graduate student David Rufina, developed a new technology with science fiction that can use light beams to move particles to the beam. source. This technology is inevitably reminiscent of the traction beam in Star Trek. Greer and Rufina stated that they have verified the technology in the experiment. Greer and Rufina worked in the Department of Physics and Soft Materials Research Center at New York University. They said that they have developed Star Trek traction beams, but only at a microscopic scale. In Star Trek, once a friendly interplanetary spacecraft was found in distress, the crew of the Aggressive spacecraft used a traction beam to drag the trapped spacecraft into a safe zone. Until now, this technology is still beyond the capabilities of physicists. What they can do is to use laser-based "pigtail" type devices to drag particles at a tiny distance in two dimensions. In an article published in the journal Physical Review Letters, Greer and Rufina described a technique that uses light beams to drag particles to the source of the light beam. Light can move objects—this feature forms the basis of solar sail technology—but using light to drag objects long distances can be quite difficult. The traction beam developed by New York University is based on a Chinese study published in 2011 using concentric Bezier beams. Studies have shown that this beam can cause particles inside to emit photons back toward the beam source, forcing the particles back to the beam source. However, no one has ever developed such a beam. In the study, New York University scientists launched two side-by-side Bessel beams that passed through the microscope and then adjusted using the lens to overlap. By changing the relative phases of the two beams, this technique can capture particles into a moving hologram - they call them "optical conveyors" - making two-way transport possible on a three-dimensional scale. "New Scientist" magazine explained how to transmit beams in this way to form alternate patterns of light and dark areas. By fine-tuning the bright photons and scattering them back, you can hit the selected particle, causing it to move to the next bright spot. Of course, this beam is not enough to capture a spacecraft. In the study, Greer and Rufina used this technology to move tiny microspheres suspended in water by 30 microns. In an interview with New Scientist magazine, Rufina said: “This technology is still in its infancy.†However, it opens a window that turns science fiction into a scientific reality. NASA also became interested in this research. (xiaowen) Aluminum Hook Type Screen Ceiling System Aluminum Hook Type Screen Ceiling System,Screen Ceiling System,Aluminum Hook Type Screen Ceiling,Wood Grain Aluminum Screen Ceiling Foshan Nanhai Lianxing Deli Decoration Materials Co.,Ltd , https://www.fstuodeli.com