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wavelengths News
Photodetector Operates to ~200 nm
Feb 1, 2008 — In semiconductor manufacturing, what is small today will seem large tomorrow, which is true as much for the wavelengths required to make the chips as it is for the devices themselves. Chip makers currently need photodetectors that sense radiation at...
Light Bent the 'Wrong' Way
PRINCETON, N.J., Oct. 15, 2007 -- A new, easy-to-produce material created from semiconductors refracts light negatively, bending the waves in the opposite direction from that taken by all materials found in nature. This unique ability may contribute to significant advances in areas...
Microlenses Stabilize Microchip VECSELs
Sep 1, 2007 — Vertical external-cavity surface-emitting lasers (VECSELs) have proved useful in numerous applications because they can be readily fabricated to produce various wavelengths and, unlike their edge-emitting cousins, produce a round collimated...
Going Negative in the Visible
Jun 1, 2007 — Negative refraction — the recently realized opposite of positive refraction — is of interest because, among other applications, it promises a superlens that can image far below the diffraction limit. To date, negative refraction has been...
New Terahertz Device Created
LOS ALAMOS, N.M., March 15, 2007 -- A device for manipulating terahertz (THz) radiation created at Los Alamos National Laboratory (LANL) could be the basis for novel electronics and photonics applications such as new imaging methods and communication technologies. In research...
Birefringent Fiber Enhances Fiber Optic Strain Sensor
Jan 1, 2007 — There are multiple solutions to the dilemma posed by a fiber sensor’s response to both temperature and strain (see Wrinkles Improve Fiber Optic Strain Sensor, page 27). For example, another recent experiment has shown that the contrasting responses...
Generator Launches Selected Mode into Multimode Waveguide
Dec 1, 2006 — Although large amounts of “dark fiber” — that is, unused fiber cables laid across cities, nations and oceans — still exist in the world today, the demand for capacity is constantly increasing. To satisfy this demand, telecom scientists are searching...
Tiny Endoscope Images in 3-D
BOSTON, Oct. 19, 2006 -- By projecting multicolored light from a single optical fiber onto tissue, a newly developed tiny endoscope can for the first time produce three-dimensional, high-definition images of hard-to-reach areas of the body through a probe the width of a...
Engineers 'Translate' IR Signals into Many Other Wavelengths
Apr 4, 2006 — SAN DIEGO, April 4, 2006 -- Researchers at the University of California, San Diego, have developed a way to "translate" optical fiber signals between the current infrared and a wide range of other bands of light, something only achieved previously...
Engineers 'Translate' IR Signals into Many Other Wavelengths
Apr 4, 2006 — SAN DIEGO, April 4, 2006 -- Researchers at the University of California, San Diego, have developed a way to "translate" optical fiber signals between the current infrared and a wide range of other bands of light, something only achieved previously...
Purdue's 'Metamaterial' Could Lead to Better Optics, Communications
Nov 30, 2005 — WEST LAFAYETTE, Ind., Nov. 30 -- Engineers at Purdue University are the first researchers to create a material that has a negative index of refraction in the wavelength of light used for telecommunications, which they say is a breakthrough that...
Purdue's 'Metamaterial' Could Lead to Better Optics, Communications
Nov 30, 2005 — WEST LAFAYETTE, Ind., Nov. 30 -- Engineers at Purdue University are the first researchers to create a material that has a negative index of refraction in the wavelength of light used for telecommunications, which they say is a breakthrough that...
Entanglement Studies Suggest Interferometry Application
Jul 1, 2004 — Two groups of scientists have independently demonstrated means of entangling photons that may enable applications in gravity-wave detection and optical interferometry. Using different approaches to entanglement, the groups have proved that the...
Low-Temperature Measurement of Shiny Metals
Feb 1, 2004 — Understanding and controlling the temperature of metals at all times during the manufacturing process is paramount if companies are to deliver products that are ever stronger and lighter. With new, unoxidized metals, the emissivity or radiation...
Fibers Thinner Than Wavelengths of Light
Dec 23, 2003 — ARLINGTON, Va., Dec. 23 -- Researchers have developed a process to create wires only 50 nanometers (billionths of a meter) thick. Made from silica, the same mineral found in quartz, the wires carry light in an unusual way: Because the wires are...
Technique Monitors Oxidative Stress
May 1, 2003 — Julio F. Turrens and his colleagues at the University of South Alabama in Mobile are exposing liposomes, amino acids and proteins such as bovine serum albumin to different peroxides to identify the wavelengths that are associated with oxidative...
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April 2024
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