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optical frequencies News
An Invisibility Cloak for the Non-Magical World?
Oct 26, 2016 — Greek mythology is filled with references to an “invisibility cap” worn on occasion by Hades, Hermes and Athena that gave the wearer the power to become invisible. And today, legions of movie-goers are familiar with the title character...
Graphene-Silicon PICs for Low-Power Telecom
NEW YORK, July 16, 2012 — A one-carbon-atom-thick sheet of graphene has transformed a passive device into an active one that generates microwave photonic signals and performs parametric wavelength conversion at telecommunication wavelengths. This optical nonlinear behavior...
Optical Nanoantennas Could Improve Data Transfer
STUTTGART, Germany, April 11, 2011 — Metallic antennas 100 nm in size that efficiently receive optical frequencies in the range of several hundreds of terahertz have been realized by researchers, who say this breakthrough could speed up optical data transfer. Physicists at the...
Laser Technique Images Cancer Quickly and Clearly
CHAMPAIGN, Ill., Dec. 8, 2010 — The long, anxious wait for biopsy results could soon be over, thanks to a tissue-imaging technique developed at the University of Illinois. The research team demonstrated the novel microscopy technique, called nonlinear interferometric...
Sound helps make a better optical clock
BRAUNSCHWEIG,Germany – Optical fibers are commonly used to transmit information and data via modulated light pulses. Now, however, three researchers at Physikalisch-Technische Bundesanstalt (PTB), working with optical frequencies rather than voice or data, are seeking to...
Laser Device Produces Dark Pulses
GAITHERSBURG, Md., June 10, 2010 — Researchers have demonstrated a new type of pulsed laser that excels at not producing light. The new device generates sustained streams of "dark pulses" – repeated dips in light intensity – which is the opposite of the bright bursts in a...
TeraXion Acquires DiCOS Technologies
Mar 29, 2005 — QUEBEC CITY, March 29 -- TeraXion Inc., a maker of optical filters for industrial applications and high-speed communication networks, announced it has acquired DiCOS Technologies, a private company with expertise in the control and stabilization of...
Photonic Crystal Enables Flat-Lens Imaging
Jan 1, 2004 — A team of scientists at Northeastern University in Boston has demonstrated that it is possible to image using a flat photonic crystal lens that displays negative refraction. The work illustrates the potential of "left-handed materials" for...
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April 2024
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