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electromagnetic waves News
Nanoresonator for 6G Enhances THz Waves 30,000-Fold
ULSAN, South Korea, Jan. 4, 2024 — The swift development of 6G communications using terahertz (THz) electromagnetic waves has intensified the demand for highly sensitive nanoresonators that are able to detect these waves. Responding to this need, researchers at Ulsan National Institute of Science and Technology (ULSAN), in collaboration with the University of Tennessee and Oak Ridge National Laboratory, optimized a THz nanoresonator specifically for 6G communications, using artificial intelligence. The optimized
Photonic Crystals Imitate Gravitational Effects on Light
SENDAI, Japan, Oct. 25, 2023 — A group of researchers has replicated the way that light would behave if it were subject to gravity, supporting a recent scientific theory about pseudogravity. According to the theory, pseudogravity, a phenomenon replicating the effects of gravity,...
Lasers and THz Waves Combined in Hyperspectral Camera
SUSSEX, England, Feb. 19, 2020 — A team of physicists at the University of Sussex has developed the first nonlinear camera capable of capturing high-resolution images of the interior of solid objects using terahertz (THz) radiation. Led by Marco Peccianti of the Emergent Photonics...
Metasurface Lens Could Transform Antennas
NANJING, China, April 16, 2014 — Traditional antennas could be in for a makeover following a discovery in broadband optics.
Plasmons Show Useful Quantum Properties
PASADENA, Calif., April 4, 2014 — Surface plasmons could be a key piece of the ever-evolving quantum computing puzzle.
Photonic Structure Saves Energy in Cooling
STANFORD, Calif., Feb. 4, 2014 — Imagine cooling a building on a hot day using little to no electricity. That's exactly what a team at Stanford University is aiming for.
Metamaterials manipulate light on a microchip
UNIVERSITY PARK, Pa. – Controlling light on a microchip is no easy feat, but new theoretical designs for miniaturized optical devices made of metamaterials could make it a little easier. A unified theory from researchers at Penn State University combines metamaterials and...
Metamaterials Manipulate Light on a Microchip
UNIVERSITY PARK, Pa., Nov. 28, 2012 — Controlling light on a microchip is no easy feat, but new theoretical designs for miniaturized optical devices made of metamaterials may provide a solution.
New approach strengthens negative refraction
CAMBRIDGE, Mass. – An “extraordinarily strong” negative refractive index as large as -700 – more than 100 times larger than most previously reported – has been achieved in metamaterials using a technique developed by scientists at Harvard...
A Novel Approach to Negative Refraction
CAMBRIDGE, Mass., Aug. 2, 2012 — An “extraordinarily strong” negative refractive index as large as -700 - more than 100 times larger than most previously reported - was achieved in metamaterials using a new technique developed by scientists at the Harvard School of Engineering and...
Superradiant laser holds bright promise
BOULDER, Colo. – A new “superradiant” laser that traps 1 million rubidium atoms into a 2-cm space between two mirrors produces a deep-red laser beam that could boost the performance of the most advanced atomic clocks, communications and navigation...
Nearly Lightless Laser Has Bright Future
BOULDER, Colo., April 4, 2012 — A new “superradiant” laser design that traps 1 million rubidium atoms into a 2-cm space between two mirrors produces a deep-red laser beam that could boost the performance of most advanced atomic clocks, communications and navigation systems, and...
LEDs transfer data to mobile devices
BERLIN – Regular LEDs in overhead lighting are being turned into an optical wireless area network that transfers high-speed data from the Internet directly to laptops and other mobile devices – safely and with no loss in quality. Under the European...
Nanostructures enable chip-scale light propagation
NEW YORK – New optical nanostructures can slow down photons and fully control light dispersion, a big step forward in figuring out how to carry information on photonic chips without losing control of the phase of the light. Researchers at Columbia...
Plasmonic Nanotweezers Keep Cool
CAMBRIDGE, Mass., Sept. 28, 2011 — A new instrument dubbed a plasmonic nanotweezer creates strong forces more efficiently than traditional optical tweezers and eliminates a problem that caused earlier setups to overheat. It may make it easier to isolate and study tiny particles such...
One-atom-thick optical devices proposed
PHILADELPHIA – One-atom-thick metamaterials that can now be made by controlling the conductivity of sheets of graphene could have wide applications in imaging, signal processing and telecommunications. The study of metamaterials is based on the idea that...
QUEST Begins for Improved Electromagnetic Manipulation
LONDON, July 8, 2011 — Becoming invisible with the swish of a cloak or bringing cell phone coverage to previously unreachable places could soon be a reality with a £4.5 million ($7.22 million) project led by Queen Mary, University of London. The project,...
1-Atom-Thick Optical Devices Proposed
PHILADELPHIA, June 13, 2011 — One-atom-thick metamaterials that can be achieved by controlling the conductivity of sheets of graphene have been proposed by two University of Pennsylvania engineers. Professor Nader Engheta and graduate student Ashkan Vakil, both of the...
Focusing on nanoplasmonics
BERKELEY, Calif. – By imaging fluorescence from gold within a bow tie-shaped plasmonic device, scientists can now study plasmonic fields in nanostructures such as a strand of DNA or a quantum dot without altering the structures’ behavior. Typical plasmonic...
‘Plasmonic Metamaterials’ May Advance Optical Cloaking
WEST LAFAYETTE, Ind., Jan. 25, 2011 — Researchers are developing a new class of "plasmonic metamaterials" as potential building blocks for advanced optical technologies, including ultrapowerful microscopes and computers, improved solar cells, and a possible invisibility cloak. The...
Plasmon Lasers Taken Out of Deep Freeze
BERKELEY, Calif., Jan. 5, 2011 — A new technique allows plasmon lasers to operate at room temperature, freeing the technology from vacuum chambers cooled to cryogenic temperatures and overcoming a major barrier to their practical use. The achievement, by researchers at the...
Light-Amplifying Metamaterial Created
WEST LAFAYETTE, Ind., Aug. 4, 2010 — Researchers have overcome a fundamental obstacle in using new "metamaterials" for radical advances in optical technologies, including ultrapowerful microscopes and computers and a possible invisibility cloak. The metamaterials have been...
THz Control Could Mean X-Ray Vision
WASHINGTON, DC, May 10, 2010 — Boston University researchers are closing in on making x-ray vision a reality. Led by BU’s Richard Averitt, the team has developed a new way to detect and control terahertz (THz) radiation using optics and materials science. This type of...
Century-Old Calculations Prove True
HOUSTON, March 24, 2010 — In 1908, the German physicist Gustav Mie came up with an elegant set of equations to describe the interaction of electromagnetic waves with a spherical metal particle. The theory h...
Light Turned into Electrical Current
PHILADELPHIA, Feb. 22, 2010 – Using a golden nanoscale system, material scientists at the Nano/Bio Interface Center of the University of Pennsylvania are now turning light into electrical currents. The syst...
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May 2024
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