Add a deceptively simple twist to a tiny fiber of glass and you get a versatile new class of optical devices to filter light; sense changes in temperature, pressure or other environmental factors; or transmit information via powerful, inexpensive lasers, according to researchers at Chiral Photonics Inc. of Clifton, N.J. Writing in the July 2 issue of Science, the company describes a new class of devices called chiral gratings that were developed with support from the Advanced Technology Program at the National Institute of Standards and Technology (NIST) and from the National Science Foundation.
Tapered chiral optical fiber created by Chiral Photonics. Fiber is less than 100 millionths of a meter in diameter.Credit: Chiral Photonics, Inc.; National Science Foundation
If the finely controlled process for making the glass fibers can be successfully scaled up to production levels, the company hopes to manufacture communications lasers, for example, that are three times more efficient than todays semiconductor lasers at about a fifth the cost.
Conventional optical fibers have a core of round cross-section, like a strand of spaghetti, but if they are made thin and flat instead, like linguine, they can be twisted into a spiral or double-helix shape. Then something remarkable happens, according to the Chiral Photonics research team. The degree of twist in the fiber acts like a selective filter allowing light pulses with certain wavelengths (colors) or orientations (polarization) to pass through, while scattering everything else.
New tech for commercial Lithium-ion batteries finds they can be charged 5 times fast
20.02.2018 | University of Warwick
In best circles: First integrated circuit from self-assembled polymer
19.02.2018 | Max-Planck-Institut für Polymerforschung
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
20.02.2018 | Life Sciences
20.02.2018 | Medical Engineering
20.02.2018 | Physics and Astronomy