A team of University of Central Florida researchers has overcome a long-standing problem in laser science, and the findings could have applications in surgery, drilling and 3D laser mapping.
Using the principle of supersymmetry, they have developed the first supersymmetric laser array. Their findings were published recently in the journal Science.
Supersymmetry is a conjecture in physics that says every particle of matter, such as an electron, has one or more superpartners that is the same except for a precise difference in their momentum.
"This is the first demonstration of a supersymmetric laser array that is promising to meet the needs for high power integrated laser arrays with a high-quality beam emission," said study co-author Mercedeh Khajavikhan, an associate professor of optics and photonics in UCF's College of Optics and Photonics.
Khajavikhan lead the team that developed the laser array, which is comprised of rows of lasers and is able to produce large output power and high beam quality.
This is a first array that consistently generates high radiance, as previous designs have resulted in degraded beam quality.
Khajavikhan said that earlier work by Demetrios Christodoulides, a Pegasus professor of optics and photonics, Cobb Family Endowed Chair in the college and study co-author, suggested the use of supersymmetry in optics and her team has explored it further in its studies.
"However, it is only recently that my group managed to bring these ideas in actual laser settings, where such notions can be fruitfully used to address real problems in photonics," she said.
The trick in her team's laser arrays is spacing lasers beside each other using calculations that take into account supersymmetry.
She said this development is very important in many areas that a high-power integrated laser is needed.
"We foresee many applications of supersymmetric laser arrays in medicine, military, industry and communications, wherever there is a need for high power integrated laser arrays having a high beam quality," Khajavikhan said.
One exciting application could be in the use of LIDAR, which uses lasers to survey and map 3D terrain and is used in fields such as self-driving cars, archaeology, forestry, atmospheric physics and more.
"LIDAR requires a high-power and high-beam quality laser," Khajavikhan said. "Currently, because of the lack of this type of lasers in integrated form, they use other kinds of lasers. The supersymmetric laser provides an integrated high-power laser solution that also shows high beam quality."
Co-authors of the study include Mohammad P. Hokmabadi, the study's lead author and a postdoctoral associate in the College of Optics and Photonics; Nicholas S. Nye, a graduate research assistant in the college; and Ramy El-Ganainy, an associate professor at Michigan Technological University and a UCF alumni.
Khajavikhan received a doctorate in electrical engineering from the University of Minnesota and master's and bachelor's degrees in electronics from Amirkabir University of Technology in Iran. She joined UCF in 2012.
Zenaida Gonzalez Kotala | EurekAlert!
21.03.2019 | Max-Planck-Institut für Polymerforschung
Levitating objects with light
19.03.2019 | California Institute of Technology
Nano- and microtechnology are promising candidates not only for medical applications such as drug delivery but also for the creation of little robots or flexible integrated sensors. Scientists from the Max Planck Institute for Polymer Research (MPI-P) have created magnetic microparticles, with a newly developed method, that could pave the way for building micro-motors or guiding drugs in the human body to a target, like a tumor. The preparation of such structures as well as their remote-control can be regulated using magnetic fields and therefore can find application in an array of domains.
The magnetic properties of a material control how this material responds to the presence of a magnetic field. Iron oxide is the main component of rust but also...
Due to the special arrangement of its molecules, a new coating made of corn starch is able to repair small scratches by itself through heat: The cross-linking via ring-shaped molecules makes the material mobile, so that it compensates for the scratches and these disappear again.
Superficial micro-scratches on the car body or on other high-gloss surfaces are harmless, but annoying. Especially in the luxury segment such surfaces are...
The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.
A special technique allows astronomers to resolve the surfaces of faraway stars. Those are otherwise only seen as point sources, even in the largest telescopes...
Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.
"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...
New research group at the University of Jena combines theory and experiment to demonstrate for the first time certain physical processes in a quantum vacuum
For most people, a vacuum is an empty space. Quantum physics, on the other hand, assumes that even in this lowest-energy state, particles and antiparticles...
11.03.2019 | Event News
01.03.2019 | Event News
28.02.2019 | Event News
21.03.2019 | Life Sciences
21.03.2019 | Physics and Astronomy
21.03.2019 | HANNOVER MESSE