News tagged with light signals
Ultra-fast photodetector and terahertz generator
Photodetectors made from graphene can process and conduct light signals as well as electric signals extremely fast. Within picoseconds the optical stimulation of graphene generates a photocurrent. Until now, ...
Jan 31, 2012 |
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JQI cool nano loudspeakers could makes for better MRIs, quantum computers
(PhysOrg.com) -- A team of physicists from the Joint Quantum Institute (JQI), the Neils Bohr Institute in Copenhagen, Denmark, and Harvard University has developed a theory describing how to both detect weak ...
Jan 25, 2012 |
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A new way to measure Earth's magnetosphere
US researchers have demonstrated the potential use of a new way to measure properties of Earth's magnetosphere, the magnetic bubble that surrounds the planet.
Space & Earth / Earth Sciences
Jan 04, 2012 |
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High-speed CMOS sensors provide better images
Conventional CMOS image sensors are not suitable for low-light applications such as fluorescence, since large pixels arranged in a matrix do not support high readout speeds. A new optoelectronic component ...
Jan 03, 2012 |
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55": LG announces world's largest OLED TV panel
LG Display announced that it has developed the world's largest 55-inch OLED (Organic Light Emitting Diodes) TV panel. The 55-inch panel is a significant step forward in the popularization of OLED TVs and demonstrates ...
Electronics / Consumer & Gadgets
Dec 27, 2011 |
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A single cell endoscope: Researchers use nanophotonics for optical look inside living cells
(PhysOrg.com) -- An endoscope that can provide high-resolution optical images of the interior of a single living cell, or precisely deliver genes, proteins, therapeutic drugs or other cargo without injuring ...
Dec 20, 2011 |
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Oxidative stress: Less harmful than suspected?
Arterial calcification and coronary heart disease, neurodegenerative diseases such as Parkinson's and Alzheimer's, cancer and even the aging process itself are suspected to be partially caused or accelerated ...
Dec 05, 2011 |
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A smarter way to make ultraviolet light beams
Existing coherent ultraviolet light sources are power hungry, bulky and expensive. University of Michigan researchers have found a better way to build compact ultraviolet sources with low power consumption ...
Nov 29, 2011 |
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Novel nanocrystals with advanced optical properties developed for use as luminescent biomarkers
Upconversion emission materials are ideal for bioimaging due to its effectiveness as contrast agents for the detection of cancer cells, more so when the background emission of non-cancerous tissues can be minimised. These ...
Nanotechnology / Nanomaterials
Nov 14, 2011 |
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Psychologists increase understanding of how the brain perceives shades of gray
Vision is amazing because it seems so mundane. Peoples' eyes, nerves and brains translate light into electrochemical signals and then into an experience of the world around them. A close look at the physics of just the first ...
Medicine & Health / Psychology & Psychiatry
Nov 10, 2011 |
4.3 / 5 (3) |
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Switching light on and off - with photons
(PhysOrg.com) -- Cornell researchers have demonstrated that the passage of a light beam through an optical fiber can be controlled by just a few photons of another light beam.
Nov 09, 2011 |
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City lights could reveal E.T. civilization
In the search for extraterrestrial intelligence, astronomers have hunted for radio signals and ultra-short laser pulses. In a new paper, Avi Loeb (Harvard-Smithsonian Center for Astrophysics) and Edwin Turner ...
Nov 03, 2011 |
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The rate of data transmission over plastic optical fibers can be increased by controlling modal dispersion
Plastic optical fibers offer a more efficient method of data transmission in telecommunications. While glass optical fibers allow very high data rates to be transmitted, they are expensive and difficult to ...
Oct 28, 2011 |
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'Microring' device could aid in future optical technologies
(PhysOrg.com) -- Researchers at Purdue University and the National Institute of Standards and Technology (NIST) have created a device small enough to fit on a computer chip that converts continuous laser light ...
Oct 19, 2011 |
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Gravitational waves that are 'sounds of the universe'
Einstein wrote about them, and we're still looking for them -- gravitational waves, which are small ripples in the fabric of space-time, that many consider to be the sounds of our universe.
Oct 03, 2011 |
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