or the batteries have no charge remaining. n addition to the applications discussed above such technology could be extended to other radiations such as magnetic resonance imaging (MRI) and light detection and ranging (LIDAR)
The component converts heat from the sun into infrared light which can be absorbed by solar cells to make electricity a technology known as thermophotovoltaics.
But silicon semiconductors only respond to infrared light. Higher energy light waves including most of the visible light spectrum are wasted as heat
while lower energy waves simply pass through the solar panel. n theory conventional single-junction solar cells can only achieve an efficiency level of about 34 percent
an absorber that heats up when exposed to sunlight and an emitter that converts the heat to infrared light
which is beamed then to the solar cell. ssentially we tailor the light to shorter wavelengths that are ideal for driving a solar cellfan explains. hat raises the theoretical efficiency of the cell to 80 percent
and his colleagues at Stanford who confirmed that devices were still capable of producing infrared light waves that are ideal for running solar cells. hese results are unprecedentedsays former Illinois graduate student Kevin Arpin the lead author of the study. e demonstrated for the first time that ceramics
and determine if the experimental thermal emitters can deliver infrared light to a working solar cell. e ve demonstrated that the tailoring of optical properties at high temperatures is possiblebraun says. afnium
and Energy project and the Department of energy s Light-Material Interactions in Energy conversion Center supported the work along with the National Science Foundation and the Research Triangle Solar fuels Institute.
As the atmosphere of the Earth blocks the ultraviolet light such study can only be carried out from space.
and intensity of their photoluminescent glow in ultraviolet light. Mart says nobody had studied the third key property the amount of time the complex remains in an excited state.
Byer says laser accelerators could drive compact X-ray free-electron lasers comparable to SLAC s Linac Coherent light Source that are all-purpose tools for a wide range of research.
ur device provides a consistent light frequency that improves both optical and electronic devices when it is used as a reference. good tuning fork controls the release of its acoustical energy ringing just one pitch at a particular sound frequency for a long timeâ##a sustaining property called the quality factor.
In the new design photons are applied to an outer ring of the spiraled resonator with a tiny light-dispensing optic fiber;
In combination with the resonator a special guide for the light was used losing 100 times less energy than the average chip-based device.
along with throwing light on the major controls on this key process over long time scales. dditional researchers from Princeton The swiss Institute of technology in Zurich (ETH) and Columbia University Lamont-doherty earth observatory.
The slower version of the cell-dying process is what lights up hillsides in autumn:
#Bubble lens bends nano beam of light PENN STATE (US) Using a few tiny liquid bubbles to bend light beams could open the doors for next-generation, high-speed circuits and displays, according to new research.
researchers use nanoplasmonicsevices that use short electromagnetic waves to modulate light on the nanometer scale, where conventional optics do not work.
However, aiming and focusing this modulated light beam at desired targets is difficult. here are different solid-state devices to control (light beams),
and focus of any light beam passing through it. Huang team created separate simulations of the light beams
and bubble lens to predict their behaviors and optimize conditions before combining the two in the laboratory.
or adjusting the laser power can change how the bubble will deflect a light beam, either as a concentrated beam at a specific target or as a dispersed wave.
Changing the liquid also affects how a light beam will refract. The materials to form bubble lenses are inexpensive,
the better quality of the light that pass through it. Huang believes that the next step is to find out how the bubble shape influences the direction of the light beam and the location of its focal point.
Fine control over these light beams will enable improvements for on-chip biomedical devices and super resolution imaging. or all these applications,
you really need to precisely control light in nanoscale, and that where this work can be a very important component,
The group engineered the miniature silicon system that produces a type of light that is quieter at certain frequencies#meaning it has fewer quantum fluctuations#than
This#squeezed light#is useful for making precise measurements at lower power levels than are required
when using normal light. Although other research groups previously have produced squeezed light the new system generates the ultraquiet light in a way that can be adapted more easily to a variety of sensor applications.#
#This system should enable a new set of precision microsensors capable of beating standard limits set by quantum mechanics#says Oskar Painter a professor of applied physics at Caltech
#Perfect for electronicsin the past squeezed light has been made using so-called nonlinear materials which have unusual optical properties.
This latest work marks the first time that squeezed light has been produced using silicon a standard material.#
When photons-particles of light-strike the beams they cause the beams to vibrate. And the particulate nature of the light introduces quantum fluctuations that affect those vibrations.
Typically such fluctuations mean that in order to get a good reading of a signal you would have to increase the power of the light to overcome the noise.
But by increasing the power you also introduce other problems such as introducing excess heat into the system.
so that the light and beams interact strongly with each other#so strongly in fact that the beams impart the quantum fluctuations they experience back on the light.
And as is the case with the noise-canceling technology used for example in some headphones the fluctuations that shake the beams interfere with the fluctuations of the light.
They effectively cancel each other out eliminating the noise in the light.##This is a demonstration of
#You need the particle nature of light to explain these quantum fluctuations and you need the wave nature of light to understand this interference.#
#The National Science Foundation the Gordon and Betty Moore Foundation the Air force Office of Scientific research and the Kavli Nanoscience Institute at Caltech supported the work.
But light varies in terms of both its intensity and its phase, which is related to the angle at
which light is traveling. What this project has developed is a means of taking low-resolution images
Using the Advanced Light source at Lawrence Berkeley National Laboratory engineers and geologists examined the fine-scale structure of Roman concrete.
Excited electrons can spontaneously fall down to an available lower energy level shooting off the difference in energy as a bit of light called a photon.
#Bendy nanosensors detect infrared light University of Pennsylvania rightoriginal Studyposted by Evan Lerner-Pennsylvania on May 22 2013u.
PENN (US)# Engineers have used a pattern of nanoantennas to develop a new way of turning infrared light into mechanical action
Because metals will naturally convert some energy from infrared light into heat researchers can connect the amount the material expands to the amount of infrared light hitting it.#
A fiber optic cable pointed upward at this system bounces light off the underside of the silicon nitride layer enabling the researchers to determine how far the structure has bent upwards.#
#We can tell how far the bottom layer has moved based on this reflected light#Cubukcu says.##We can even see displacements that are thousands of times smaller than a hydrogen atom.#
The new device is an improvement in this regard due to the inclusion of#slot#nanoantennas cavities that are etched into the gold layer at intervals that correspond to wavelengths of mid-infrared light.#
which type of light it is sensitive to by etching a different pattern of slots on the surface.#
I had the chance to see Ember in action at Autodesk Pier 9 manufacturing space in San francisco. It a digital light processing machine,
The light from a low-power infrared laser interacts with the atoms and is transmitted through the fiber-optic cable to register the magnetic field strength.
and the researchers are confident that it will only be a matter of time before they can fill the gap-they say they will do so mainly by boosting the amount of light detected.
Another system, developed at the UK's National Physical Laboratory, uses radio frequencies, microwaves, terahertz radiation and far-infrared light to determine the ripeness of strawberries
The lasers will send brief pulses of light around 16 billion of them in a year that are optimized to pass through the canopy of even very dense forests without causing harm to animals or vegetation,
Conventional image sensors work by first converting light into electrical signals then combining that information with the red green
LANP graduate student Bob Zheng set out to create a photonic system that could detect colored light but in what lab director Naomi Halas calls a great example of the serendipity that can occur in the lab he wound up with a device with far broader applications.
It's these approximately 100-nanometers-wide slits that allow the device to differentiate between colors with plasmons waves of electrons that flow across metal surfaces) excited by light of a specific wavelength.
they also interact with each other thereby increasing the amount of light absorbed (and thus potentially reducing noise.
You get this funneling of light into a concentrated area. Today's color filtering mechanisms often involve materials that are not CMOS-compatible
and the wind The light is being developed through a collaboration between the Universitat Politècnica de Catalunya and Spanish startup Eolgreen.
and a lithium iron phosphate battery pack that can store enough power to run the lights for up to 3. 5 nights per charge an optional higher-capacity battery could reportedly manage 6. 5 nights.
and plans to produce 700 of the lights this year. Spain University of Seville is also working on a solar wind-powered streetlight,
partially blocking incoming light, without the need for an external power source. The device also functions as a small transparent battery that recharges on its own simply by interacting with the oxygen in its surroundings.
wee seen a number of"smart windows"pop up that act as high-tech shutters to shield incoming light during those hot sunny days.
controllable with a light switch or wirelessly through a smartphoneenerally rely on an external power source to function,
and the company Trilite Technologies have developed a new kind of display just for this purpose that sends beams of light directly to the viewerseyes via a laser and a sophisticated mirror system.
and a movable mirror to send light beams in different directions, which the creators claim produces angular resolution so fine that the left eye is presented a different picture than the right one,
The breakthrough is in the new system's ability to bind titanium dioxide (Tio2) a photocatalyst that reacts under ultraviolet light.
and polymer layers where the light is collected. Furthermore, graphics can be printed to improve its visual appearance.
Freely designed decorative organic solar panels are applicable also in indoor use to harvest energy from indoor Light production methods are cost-effective
VTT is also developing a method to utilize light in wireless data transfer by using solar cells as data receivers.
which the devices can also harvest energy from the ambient light. The first results have been very promising g
When activated by light, these nanoscale motors twist the polymer chains in the gel, which as a result contracts by several centimeters.
as soon as the motors are activated by light they twist the polymer chains in the gel, which makes it contract.
##All three CEOS expressed frustration that the first time their fledgling industry has seen the light of day,
At our 2013 Structure Data conference, the CIA s tech chief, Gus Hunt, said the new breed offitness trackers#were both light on security
or left so that it can turn on or off the lights. With#Phillips Hue#and countless other smart lights, this is already possible.
If invisible buttons were defined just rigidly on-off switches they wouldn t be terribly useful. But because the actions they trigger#can be modified by an infinitude of other variables,
internet-connected smart energy systems can figure out you re home the moment you switch on a light.
Anticipatory computing and the end of interfaces Objects on our bodies (health monitors, smart glasses) and in our homes and businesses (smart thermostats, lights, appliances and security systems) can all be programmed to interact in complicated and unexpected ways
With a trio of cameras and lights up front and those floppy flailing legs, RHEX gets your pareidolia going##it looks like a determined little critter trying to find a snack.
As the sun shifts, the light comes in at an angle, creating shadows within the cylinder.
which ensures that they always get direct light. Via Pop Sci Share Thissubscribedel. icio. usfacebookredditstumbleupontechnorat k
The company developed a patented##Light-guide Optical Element##(LOE) in effect a tiny projector that projects onto a special lens
the lights go off and the system shuts down, ##he says, in what is a simulation of just one potential result of a successful attack.
which keep the lights on for millions of homes and businesses. With a start-up budget of#2. 7m granted by the Islington Council
With the Utah system a bus could charge from coils placed under the road surface where passengers load or at traffic lights.
At the start of this year, Meeker and his cofounders gave one of their 30 employees the green light to start#The Barkpost.
and#d. light, a for-profit seller of solar lights, recently reached its1 millionth customer. Video)##If these numbers haven t raised the attention of institutional investors,
allowing, for instance, a consumer to control his TV, house lights, and AC unit from a smartphone#or augmented reality devices like Glass##isn t actually all that far off.
##Clocking in at a tiny eight-inches long and 2. 1 ounces light, the PD-100 Black Hornet, was previously a mere#prototype back in 2009,
expect it to use its core data-handling skills to shed new light on familiar age-related maladies.
The algorithm alters the light from each individual pixel so that, when fed through a tiny hole in the plastic filter,
rays of light reach the retina in a way that re-creates a sharp image. Researchers say the idea is to anticipate how your eyes will naturally distort whatever's on screen something glasses
which causes different parts of the lens to refract light differently. While similar methods have been tried before,
#New LED light technology sheds light on the future of food LED growing lights, delivering sunlight whatever the weather.
We need to make better use of land, light and logistics for an increasingly urban population.
or grow indoors with the help of artificial lights. Vertical farming is promising because it requires no soil,
and environmental controls that regulate temperature, humidity and light to produce vegetables, fruits and other crops year-round.
Considerable energy is required to power a closed, indoor greenhouse facility s artificial lighting, heating and cooling
This kind of artificial light has an extremely high photoelectric conversion efficiency consuming only one eighth the power of incandescent lamp, half of the power of fluorescent lamp,
and can produce light of varying intensity. Because it produces less heat, the light can be moved closer to the plants.
This increases efficiency, not just in terms of energy use but by allowing layers of growing plants to be packed more densely, making more efficient use of space.
they can be combined to create perfect lighting that provide light on the ideal spectrum for a plant s growth.
Evidence is emerging that specific wavelengths of light have distinct effects on crop yield, quality, and even pest and disease resistance.
There is potential for these multifunctional techno-greenhouses built around LED grow lights to increase the quality of the food we eat
"So Vessyl understands that you drank 20 ounces of Red Bull or half a can of Miller Light,
your light adjusts to the level that you want it. All of that can start to happen
but many involve large machines employing a system of mirrors to direct light with limited viewing angles.
powered by a computer chip that can control the color, brightness and angle of each beam of light across one million pixels.
The research team also included scientists at Fudan University in Shanghai, the Chinese Academy of Sciences and Diamond Light source.
Itl include optimized lights set to a wavelength to grow perfect plants and specialized air-conditioning that keeps temperature and humidity set to a constant level.
and the neon lights of Shibuya shining bright. No, you won be able to see the most impressive part,
The mirrors will be positioned so they can direct light onto two photovoltaic panels 24 hours a day.
by using infrared light). Scientifically viable in 2015; mainstream in 2018; and financially viable in 2019.
vertical farms could augment natural light using energy-efficient lighting. The advantages are numerous, including year-round crop production, protection from weather, support urban food autonomy and reduced transport costs.
#Cree LED tubes will make fluorescent lights seem old fashioned In the scramble to replace traditional forms of illumination with greener LED sources,
fluorescent overhead lights. The new Cree T8 bulb looks very much like the traditional T-8 fluorescent tube wee been using since the 1970s.
then collects and analyzes the light reflected back. The Kickstarter launched Tuesday morning with several funding levels:
shine its blue light onto an object you want to analyze. In a few seconds, the associated smartphone app will take the spectrometer reading,
#Scientists develop an off-switch for the brain Scientists have developed essentially an ff-switchfor the brain by using light pulses to effectively shut down neural activity.
In 2005, Stanford scientist Karl Deisseroth discovered how to switch individual brain cells on and off by using light in a technique that he dubbed ptogenetics,
And like that, the bulb lights up. Wireless homes Don worry about getting zapped: Hall assures that the magnetic fields used to transfer energy are erfectly safein fact,
In order to the lamp beginning to radiate light, it is necessary in motion this is specially equipped with a mechanism like a pendulum.
showing it was able to adapt to changing patterns of light in its surroundings within 1 to 2 seconds,
Postdoctoral fellow Javier Fernandez and Wyss Institute director Donald Ingber created an artificial version of chitin that is light clear strong as aluminum
and graduate student Ganghun Kim, the microscope technique works when an LED light is illuminated and guided through a fiberoptic needle or cannula.
For instance, amber hallway lights are bright enough for occupants to navigate the corridor, but not disruptive of the human eye production of rhodopsin (which helps us see in darkness,
Blue light during the day helps maintain alertness. The home also features a passive design that maximizes heating
and cooling (the south-facing windows) and natural light and ventilation (the north-facing windows). The property is also five times more water-efficient than the normal house, with low-flow fixtures and short-run hot-water pipes.
#Quantum'entangled'light sharpens microscopes'images The first microscope that uses the eerie trick of quantum entanglement to increase its sensitivity has been developed by Japanese researchers.
or particles of light, the microscope reveals things that are completely transparent, visualizing them in a much better quality than could be done with ordinary light.
Physics guru Albert Einstein once famously called it"spooky action at a distance.""This unique property is already being looked at as a potential mechanism for quantum information technologies, such as quantum cryptography and quantum computation.
or closer together than the wavelength of light used in the microscope to illuminate them.
This pattern is only 17 nanometers higher than the rest of the plate something that is very difficult to see with a standard optical microscope.
"An image of A q shape carved in relief on the glass surface is obtained with better visibility than with a classical light source,
and measuring the difference in the phase of the light between the two photon states
This way, one could improve resolution by switching from visible light to X-rays. But X-ray microscopesare difficult to use and coherent X-ray sources like X-ray lasers, in
"The quantum entanglement idea gives a road to get X-ray resolution using only visible light. In the future, this could lead to inexpensive microscopes that use ordinary lasers to get this resolution,
The biggest one is entangled that the photon light sources currently available are said very faint Dowling, and while they give the improved resolution, the rate at
and biofluorescence in the mesopelagic zone found at 656 to 3281 feet (200 to 1000 m) below the ocean's surface where light is dim
Bioluminescence is created the light by living organisms through a chemical reaction in the creatures'bodies. Biofluorescence on the other hand occurs
when organisms absorb high-energy short wavelength light (such as ultraviolet light) then re-emit that light at a longer wavelength.
This process makes the organisms appear to glow with an eerie colored light (often green or red.
The photons can then be channeled into a coherent beam of light using mirrors. Aside from its importance in the development of quantum computers, the maser could also lead to advancements in a variety of fields such as communications, sensing and medicine,
which relies on coherent light sources.""In this paper the researchers dig down deep into the fundamental interaction between light
and the moving electron,"said Claire Gmachl, professor of electrical engineering at Princeton.""The double quantum dot allows them full control over the motion of even a single electron,
Learning to control these fundamental light-matter interaction processes will help in the future development of light sources
"You can't persuade shareholders that they should invest money indefinitely in the absence of any light at the end of the tunnel,
Any federal reliance on cloud computing, for example, will have to be evaluated in the light of security requirements.
In that device, light is run through a system of micromirrors before reaching the sensor2. But longer, microwave wavelengths#for applications such as airport scanners#require a different approach,
For the latest study, the researchers turned to metamaterials#artificial structures patterned to interact with light in exotic ways.
Exposed to the sun, a solar cell employing such nanowires can turn nearly 14 percent of the incoming light into electricity#a new record that opens up more possibilities for cheap and effective solar power.
and phosphorus that absorbs much of the light from the sun (a property known as its band gap).
Now we absorb 71 percent of the light above the band gap and we can certainly increase that,
such as ultra-efficient light-emitting diodes (LEDS) and solar cells, but the technology has found mainly niche applications.
in which a mix of quantum dots tuned to absorb different wavelengths of light could capture more of the energy in the solar spectrum.
Near the backlight of a liquid-crystal display (LCD), for example, temperatures can be around 100#C. At this temperature,
The contrast with today s flat screens begins with the light source. Conventional LCDS use a high-intensity blue LED backlight
whose glow is converted by a phosphor coating to create a broadband, white light used to make the moving TV images.
The new Triluminos tele#visions instead pair an uncoated blue LED with a thin glass tube filled with quantum dots.
Two kinds of quantum dots in the tube absorb some of the blue light from the backlight
The resulting white light is more intense at the wavelengths of these three specific colours than the white light made by a phosphor-coated LED,
and similarly converts raw blue light into white light made up of pure colours. Nanosys and 3m announced their partnership in June 2012
But the light#emitted after a beam of electrons kicks a material s own electrons into a higher energy state#is faint and diffuse,
giving materials scientists a new tool for investigating the behaviour of light in the interiors of the complex nanostructures used in lasers, light-based circuits and solar cells."
compared with hundreds of nanometres for a beam of light. But maps made by scattered or reflected electrons are not typically sensitive to the way light behaves in the sample.
and energy of the light (see Metamaterial TV). The device is sensitive enough to pick up a signal even from materials that are barely luminescent, such as metals.
they show that the phase velocity of visible light#the speed at which the peaks and troughs of the wave travel through the material#is so fast that it is travelling effectively in a vacuum, the explanation for the material s overall refractive index of zero (E.#J.#R.#Vesseur et al.
The team has mapped also the distribution of light in the silicon nanodiscs that are used as a coating on solar cells to improve efficiency,
Lukas Novotny, an optical physicist at The swiss Federal Institute of technology in Zurich, says that cathodoluminescence could be a useful tool for improving the performance of light-emitting devices and solar cells,
as indicated by a light. An implant recorded neural activity in the rat's motor cortex (the area that controls its movements), compared it to earlier recordings,
The Food and Drug Administration (FDA) Thursday approved the first retinal implant for use in the United states. The FDA s green light for Second sight s Argus II Retinal Prosthesis System gives hope to those blinded
the rod and cone cells that convert light into electrical signals transmitted via the optic nerve to the brain s visual cortex for processing.
describing in vitro electrical stimulation of healthy and degenerate rat retina by photodiodes powered by near-infrared light.
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