Star Trek fans will remember "tractor beams," lasers that allowed the Starship Enterprise to trap and move objects. Tel Aviv University is now turning this science fiction into science fact — on a nano scale.
A new tool developed by Tel Aviv University, Holographic Optical Tweezers (HOTs) use holographic technology to manipulate up to 300 nanoparticles at a time, such as beads of glass or polymer, that are too small and delicate to be handled with traditional laboratory instruments. The technology, also known as "optical tweezers," could form the basis for tomorrow's ultra-fast, light-powered communication devices and quantum computers, says Dr. Yael Roichman of Tel Aviv University's School of Chemistry.
She's using these tweezers to build nano structures that control beams of light, aiding in the development of anything from optical microscopes to light-fuelled computer technology, she reports.
Holding onto the light
HOTS are a new family of optical tools that use a strongly-focused light beam to trap, manipulate and transform small amounts of matter. First proposed as a scientific theory in 1986 and prototyped by a University of Chicago team in 1997, holographic optical tweezers have been lauded as indispensible for researching cutting-edge ideas in physics, chemistry, and biology.
Dr. Roichman and her team of researchers are currently pioneering the use of optical tweezers to create the next generation of photonic devices. Made out of carefully arranged particles of materials such as silicon oxide and titanium oxide, these devices have the ability to insulate light, allowing less energy to be lost in transmission.
"Our invention could increase transmission speed and save energy, important for long-life batteries in computers, for instance," says Dr. Roichman.Photons are already used in optical fibers that bring us everyday luxuries like cable TV. But Dr. Roichman says this technology can be taken much further. In her lab at Tel Aviv University, she is advancing the previous study of photonic crystals, which control and harness light, by manipulating a variety of particles to create 3D heterogeneous structures. The ability to insulate light in a novel way, preserving its potential energy, is central to this goal.
In Dr. Roichman's approach, different materials are added to absorb or amplify light as required. She is hopeful that the ability to build these devices will transform communications, telescopic instruments, and even medical technology, making them more efficient and powerful.
Shining a light into a bacterium’s belly
One project Dr. Roichman is working on tracks the effectiveness of antibiotics. Her improvements to optical microscopy will, for the first time, allow researchers to look at the internal processes within bacteria and see how different types of antibiotics attack them. More than that, her optical tweezers can isolate the bacteria to be studied, handling them without killing them.
Dr. Roichman, whose previous research was published in the journals Applied Optics and Physics Review Letters, notes that HOTs give researchers a platform with infinite possibilities. They give science a valuable tool to reach into the microscopic world — and their building potential is endless.
Keep up with the latest AFTAU news on Twitter: http://www.twitter.com/AFTAUnews
George Hunka | EurekAlert!
SwRI-led team discovers lull in Mars' giant impact history
26.04.2017 | Southwest Research Institute
New survey hints at exotic origin for the Cold Spot
26.04.2017 | Royal Astronomical Society
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
26.04.2017 | Materials Sciences
26.04.2017 | Agricultural and Forestry Science
26.04.2017 | Physics and Astronomy