possibly in the form of faster transistors and more sensitive photodetectors. hen it comes to electronic properties,
said Hofmann. t a flexible platform that can be used for different technologies. ossible applications for this technique range from atomically perfect buried interconnects to single-electron transistors, high-density memories, light emission, semiconductor lasers,
and exposed it to ultraviolet light, which is found in the sun rays and breaks down many materials.
Under the leadership of the Max Planck researchers, a new study has now been shed able to some light on key elements of the mechanism that leads to the release of nitrogen monoxide
#Scientists determine structure of important drug target using groundbreaking X-ray laser approach Using the brightest X-ray laser in the world,
This graphic shows the light-sensitive protein complex rhodopsin-arrestin imaged via femtosecond X-ray laser. Photo by:
Jason Drees for the Biodesign Institutethe study, rystal Structure of Rhodopsin Bound to Arrestin Determined by Femtosecond X-ray laser,
and unravel its structure using Free electron lasers. This is a huge step forward and provides an excellent guide for developing new drugs with fewer side effects. esearchers at the Center for Applied Structural Discovery helped to pioneer a new technique called femtosecond crystallography,
which takes advantage of a cutting edge X-ray Free electron laser (XFEL) instrument at the Department of energy (DOE) SLAC National Accelerator Laboratory, Stanford.
and a dramatic demonstration of the power of the X-ray laser at the SLAC DOE National Laboratory to reveal new molecular structures
and could form the basis of optical computing. A nanoscale view of the new superfast fluorescent system using a transmission electron microscope.
But first engineers must build a light source that can be turned on and off that rapidly.
While lasers can fit this requirement, they are too energy-hungry and unwieldy to integrate into computer chips.
Duke university researchers are now one step closer to such a light source. In a new study, a team from the Pratt School of engineering pushed semiconductor quantum dots to emit light at more than 90 gigahertz.
This so-called plasmonic device could one day be used in optical computing chips or for optical communication between traditional electronic microchips. his is something that the scientific community has wanted to do for a long time,
When a laser shines on the surface of a silver cube just 75 nanometers wide,
These oscillations create their own light, which reacts again with the free electrons. Energy trapped on the surface of the nanocube in this fashion is called a plasmon.
and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
#Researchers demonstrate the world first white lasers While lasers were invented in 1960 and are used commonly in many applications,
one characteristic of the technology has proven unattainable. No one has been able to create a laser that beams white light.
Researchers at Arizona State university have solved the puzzle. They have proven that semiconductor lasers are capable of emitting over the full visible color spectrum,
which is necessary to produce a white laser. The researchers have created a novel nanosheet a thin layer of semiconductor that measures roughly one-fifth of the thickness of human hair in size with a thickness that is roughly one-thousandth of the thickness of human hair with three
parallel segments each supporting laser action in one of three elementary colors. The device is capable of lasing in any visible color, completely tunable from red, green to blue,
or any color in between. When the total field is collected, a white color emerges. The researchers, engineers in ASU Ira A. Fulton Schools of Engineering, published their findings in the online publication of the journal Nature Nanotechnology.
Cun-Zheng Ning, professor in the School of Electrical, Computer and Energy Engineering, authored the paper, monolithic white laser, with his doctoral students Fan Fan, Sunay Turkdogan, Zhicheng Liu
The technological advance puts lasers one step closer to being a mainstream light source and potential replacement or alternative to light emitting diodes (LEDS.
Lasers are brighter, more energy efficient, and can potentially provide more accurate and vivid colors for displays like computer screens and televisions.
Another important application could be in the future of visible light communication in which the same room lighting systems could be used for both illumination and communication.
The technology under development is called Li-Fi for light-based wireless communication, as opposed to the more prevailing Wi-fi using radio waves.
and white laser Li-Fi could be 10 to 100 times faster than LED based Li-Fi currently still under development. he concept of white lasers first seems counterintuitive
because the light from a typical laser contains exactly one color, a specific wavelength of the electromagnetic spectrum, rather than a broad-range of different wavelengths.
White light is viewed typically as a complete mixture of all of the wavelengths of the visible spectrum, said Ning,
a blue LED is coated with phosphor materials to convert a portion of the blue light to green, yellow and red light.
This mixture of colored light will be perceived by humans as white light and can therefore be used for general illumination.
Sandia National Labs in 2011 produced high-quality white light from four separate large lasers. The researchers showed that the human eye is as comfortable with white light generated by diode lasers as with that produced by LEDS,
inspiring others to advance the technology. hile this pioneering proof-of-concept demonstration is impressive,
those independent lasers cannot be used for room lighting or in displays, Ning said. single tiny piece of semiconductor material emitting laser light in all colors
or in white is desired. Semiconductors, usually a solid chemical element or compound arranged into crystals, are used widely for computer chips or for light generation in telecommunication systems.
and are used to make lasers and LEDS because they can emit light of a specific color
The most preferred light emitting material for semiconductors is indium gallium nitride though other materials such as cadmium sulfide and cadmium selenide also are used for emitting visible colors.
To produce all possible wavelengths in the visible spectral range you need several semiconductors of very different lattice constants
and energy bandgaps. ur goal is to achieve a single semiconductor piece capable of laser operation in the three fundamental lasing colors.
Later on they realized simultaneous laser operation in green and red from a single semiconductor nanosheet or nanowires.
if a single white laser is ever possible. Blue, necessary to produce white, proved to be a greater challenge with its wide energy bandgap
which is required to demonstrate eventual white lasers, said Turkdogan, who is now assistant professor at University of Yalova in Turkey.
and an important breakthrough that finally made it possible to grow a single piece of structure containing three segments of different semiconductors emitting all needed colors and the white lasers possible.
significant obstacles remain to make such white lasers applicable for real-life lighting or display applications.
One of crucial next steps is to achieve the similar white lasers under the drive of a battery.
For the present demonstration, the researchers had to use a laser light to pump electrons to emit light.
and will lay the groundwork for the eventual white lasers under electrical operation
#Scientists create functional liver cells from stem cells Major implications for liver biology and drug discovery The liver plays a critical role in human metabolism.
like schizophrenia or Parkinson disease (see racking the Brain Codesand hining a Light on Madness.
Made using conventional photolithography techniques the mesh is composed of nanoscale metal wires and polymers. Tiny electronic devices, such as sensors and electrode stimulators, can be built into it.
when the phone is exposed to artificial or natural light, it captures the light and converts it to an electric current.
A connection to the gadget battery would enable the layer to send power directly to it.
But while De Broca says the energy WYSIPS Crystal can produce depends on the kind of light it exposed tontense natural light will work better than diffuse indoor lightingn its current form it can boost battery life by only about 10 to 15 percent. t
its face dominated by a large display and a receiver module for phone calls that includes a light and proximity sensor on the front.
They also determined the nonlinear optical response of the nanosheets to a pulsed laser by measuring the amount of light that is transmitted.
It turns out that the amount of light black phosphorus absorbs decreases as the intensity rises, a property known as saturable absorption.
"These are very fast electrons that behave like unidirectional light beams and can be used for new types of quantum computing."
a new light-activated Cas9 nuclease could offer researchers greater spatial and temporal control over the RNA-guided nuclease activity,
The team has used also photoactivatable technology to develop a light-activated CRISPR-based transcription system to target specific genes for expression.
using its Magnet proteins to create a photoactivatable Cas9 nuclease (pacas9) for light-controlled genome editing. he existing Cas9 does not allow to modify genome of a small subset of cells in tissue, such as neurons in the brain,
When irradiated with blue light, the Magnets come together, bringing with them the split Cas9 fragments, which then merge to reconstitute the nuclease RNA-guided activity.
when the light is turned off, the pacas9 nuclease splits again, and nuclease activity is halted. uch an on/off-switching property of pacas9 is the most important breakthrough previously unattainable,
and highlights the versatility of the system. y impression is that the light-activated system using the magnet approach works well,
there may be specific developmental studies where ultra-precise activation of gene editing such as in a specific developmental domain via a precisely directed beam of light could prove to be a very elegant approach.
The researchers used photolithography to fashion a sheet of micropillars, then spread the liquid crystal on the sheet.
a glass slide with the letter P drawn on in marker, between it and the microscope light source.
#Synchrotron shines a light on future medical devices According to the international team, this technique could be important in the development of devices that are highly sensitive to magnetic fields,
Berlin/Dresden University of Technology in collaboration with research partners from Advanced Light source/Lawrence Berkeley National Laboratory,
Using the X-ray microscope at the Advanced Light source and the X-ray Photoemission Electron microscopy (XPEEM) beamline at HZB BESSY II,
However, so far only electron holography could be considered for mapping magnetic domains of three-dimensional objects at the nanometre scale
These pulses then stimulate the retina remaining cells, resulting in the corresponding perception of patterns of light in the brain.
but POWERFUL LASER suitable for very SMALL sharks Shrinking the scale of semiconductor materials to help build powerful quantum computing systems has proved to be a real head-scratcher for scientists.
said that researchers had created the smallest laser possible powered by single electrons that burrow through quantum dots.
"is a minuscule microwave laser that demonstrates how light and moving electrons interact with each other, said Princeton university.
The research could apparently aid the future development of light sources. Princeton university provides further details about the study's promising outlook for quantum computing here.
#World's first malaria vaccine gets green light from European regulatory agency The world's first malaria vaccine has cleared its last major hurdle on its way to being approved for real-world use.
With this"green light,"the World health organization will decide later this year whether or not to recommend the shot for use.
#Engineers create world's first white laser beam Researchers at Arizona State university have created the world's first white laser beam,
but white lasers could serve as a potential alternative light source both in people's homes and in the screens of their electronics.
Lasers are more energy efficient than LEDS, and the ASU researchers claim that their white lasers can cover 70 percent more colors than current standard displays.
The researchers also suggest the technology could be used beyond consumer electronics. They suggest white lasers could be used in Li-Fi
a developing technology that uses multiple colors of light to enable high-speed wireless internet access. Currently, LEDS are being used to develop Li-Fi technology,
which could be 10 times faster than current radio-based Wi-fi. Ning and his colleagues argue that Li-Fi using white lasers could be 10 to 100 times faster than LED-based Li-Fi.
White lasers could serve as a potential alternative light sourcefor the past 50 years, lasers have been able to emit every single wavelength of light except for white.
The problem is that typical lasers only beam one specific wavelength of light at a time. To create white
the ASU researchers manufactured three thin semiconductor lasers each as thick as one-thousandth of a human hair
and lined them up parallel to one another. Each semiconductor emits one of the three primary colors
and are combined then together to form white. The entire device can also be tuned to create any color in the visible spectrum.
White lasers won't be showing up in our electronics any time soon, however. For this study, the researchers had to pump electrons into the semiconductors with an additional laser light.
The engineers will have to design white lasers to run on battery power before they can be used for commercial applications.
This image shows mixed emission color from the semiconductor lasers in the colors of red green, blue, yellow, cyan, magenta, and white.
ASU/Nature Nanotechnology o
#Google, Samsung, and 16 others receive post-password certification This morning, the plot to kill the password got a little stronger. 18 different companies received an official FIDO certification for 31 different products,
Whereas, the latter use infrared tissue spectroscopy, wherein the sensor measures the intensity of light absorbed by alcohol, to zero in on the blood alcohol level.
Despite all this tech, the glasses are actually pretty light and slim. It's sort of hard to tell that they're even smart glasses point that seems to have been lost on Google glass.
Alcohol levels would be measured under the skin's surface on a touchpad with an infrared light scanner.
These molecules give off a certain wavelength when put under infrared light beams, which will be placed in the car.
The sensors will act as a tracking system to measure the ratio of carbon dioxide molecules to ethanol molecules produced by the driver.
utilizing spectroscopy to measure alcohol levels in skin tissue. Infrared light will shine on the driver's skin upon touching a sensor
and a portion of this light will reflect back to a system in the touch pad.
The reflection can tell the system what chemical properties are present in the skin, including ethanol levels in the tissue.
An infrared laser sensor module provides a thin optical surface on the keyboard. The device communicates wirelessly with whatever mobile device is used with it via Bluetooth Low energy 4. 0 technology.
#Researchers Develop Super-Hydrophobic Metal Surfaces Using Lasers Researchers have turned metal surfaces water repellent using femtosecond laser pulses.
Researchers from the University of Rochester have used femtosecond laser pulses to turn metals waterproof or super-hydrophobic.
said, his is the first time that a multifunctional metal surface is created by lasers that is super-hydrophobic (water repelling),
the laser treated metal surfaces can also absorb heat and light. The potential applications for anti-icing surfaces involve protection of aerofoils, protection of aerofoils, pipes of air conditioners and refrigerators, radar or telecommunication antennas,
titanium and brass to short bursts of lasers. These short burst lasted for only millionth of a billionth of a second.
These super powerful laser pulses produced microgrooves on top of which densely populated, lumpy nanostructures were formed. The optical and wetting properties of the surfaces of the three metals were altered by these nanostructures.
The nanostructures created by the lasers are intrinsic to the metal surface. According to the researchers, properties they provide to the metal will not deteriorate.
The super-hydrophobic properties of the laser-patterned metals are similar to the famous nonstick coating.
so that nanoscale structures can be seen with an ordinary light microscope. This new technique uses commonly available chemicals to help experts increase the size of tissue samples effortlessly.
#Princeton Researchers Develop Rice Sized Laser Princeton university researchers have built a rice sized laser powered by single electrons tunneling through artificial atoms known as quantum dots.
#Researchers Develop Rice-Sized Laser That Can Boost Quantum computing Researchers have developed a microwave laser or maser,
Princeton university researchers developed a laser the size of a grain of rice, while investigating the use of semiconductor material fragments as components for quantum computing.
and not lasers. Quantum dots act like single atoms, as components for quantum computers. The maser is a tiny,
rice grain sized laser that is powered by a single electron from the artificial atoms called quantum dots.
that not only reflects 97%of light, but also radiates heat into the cold depths of the universe and
and also reflected 97%of the light that fell on it. f you cover significant parts of the roof with this mirror,
an expert in photonics at Stanford university who led the development of the mirror. n some situations the computations say you can completely offset the air conditioning.
Visible light and infrared lights pass heat through the building surfaces. To make things cool again, engineers believe that the surfaces should have ways in
it releases heat at a specific wavelength of infrared light that passes easily through the atmosphere and out into space.
it radiates the heat as infrared light of 10 micrometer wavelength. Since nothing in the atmosphere can absorb that,
The ultraviolet light from the sun rays are used to kill biological contaminants in the water. While similar desalination technologies have already been discovered,
Well a frequency comb separates light pulses into discrete, equally spaced"tine-like"elements. Thus information traveling through a fiber optic cable is discrete
the lights were less flashy, and coffee was the beverage of choice. In previous Surge demo days
According to the publication, the signatories are appealing to government officials to protect privacy rights in light of companies adding increased security and encryption to mobile devices in a post-Snowden era.
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