and even lasers, there are many ways people can restore or correct their vision. But the latest so-called'bionic'lens promises to not only restore sight,
this can also include radio waves, lasers and even sound waves. The microwave gun is evidence of plans by Russia to modernise its armed forces,
#High-speed lasers create images that respond to strokes without burning the skin By Victoria Woollaston for Mailonline Published:
But because they use lasers to project the hologram, it makes interacting with the images potentially dangerous-until now.
Researchers have created 3d holograms using lasers that fire at a quadrillionth a second, and they respond to touch without burning the user's skin.
Scroll down for video Researchers from the University of Tokyo used femtosecond lasers to create 3d holograms that are safe to touch
Holography uses lasers to record the brightness, contrast and dimensions of an image and project this image, typically in 3d,
and are created when the energy from the laser ionises the air and releases extra energy in the form of photons
but these involved lasers that pulse with bursts that last for nanoseconds, for example. Although this is a relatively short period of time,
To solve this problem the Japanese researchers created plasma voxels using femtosecond lasers instead. A femtosecond is a quadrillionth of a second
and these lasers pulse with bursts that last between 30 and 270 femtoseconds at a time. The researchers fired the femtosecond laser through
what's known as a spatial light modulator and a series of lenses into a Galvano scanner.
Aerial and Volumetric Graphics Rendered by Focused Femtosecond Laser Combined with Computational Holographic Fields, additionally shows it being wrapped around objects
'We present a method of rendering aerial and volumetric graphics using femtosecond lasers, 'explained the team.
and a broken heart'A high-intensity laser excites a physical matter to emit light at an arbitrary 3d position.'
since plasma induced by a femtosecond laser is safer than that generated by a nanosecond laser.'
A likely application says Johan Liu is the integration of graphene-based film into LEDS, lasers and radio frequency components for cooling purposes. s
A likely application says Johan Liu is the integration of graphene-based film into LEDS, lasers and radio frequency components for cooling purposes n
#Lasers create surface so hydrophobic that water bounces off like a ball In the study of hydrophobic surfaces,
Now, researchers at the University of Rochester have used lasers to create a surface so hydrophobic that a single droplet of water can bounce up and down on it multiple times like a ball.
shoot it with lasers. Chunlei Guo and Anatoliy Vorobyev of the University Institute of Optics discovered a laser-patterning technique that etch nanoscopic structures onto a surface.
As you can see from the above video, the surface etched pattern is so hydrophobic that water literally bounces off,
Water rolls off the laser-etched surfaced when it titled less than five degrees, whereas a common Teflon pan has to be turned a steep 70 degrees.
The team is also exploring how to apply the laser-patterning technique to other surfaces.
#DARPA laser scanning: Bending light with a microchip The Defense Advanced Research Projects Agency (DARPA) has demonstrated solid-state optical phased array technology in a microchip bringing the ability to bend light to the battlefront.
which act as electrically tunable gratings 1. The former has the problem that a mechanical assembly is used to sweep the laser back and forth,
The SWEEPER technology has demonstrated that it can sweep a laser back and forth more than 100 000 times per second, 10,000 times faster than current state-of-the-art mechanical systems.
It can also steer a laser precisely across a 51°arc, the widest field of view ever achieved by a chip-scale optical scanning system.
DARPA foresees this technology will open up a new class of miniaturized, extremely low-cost, robust laser-scanning technologies (LIDAR),
along with better xenon, LED and laser headlamps; steerable headlamps; and night vision. How it works: GPS knows where the road curves
#Will Zuckerberg use his Internet-laser drones for good or for evil? According to the International Telecommunications Union more than 50 percent of the world population is currently without Internet access.
Lasers have been a key area of advancement: Lockheed martin test fired a laser weapon in March that took out a truck engine from a mile away,
#Princeton Researchers Created Rice Grain-Sized Laser In today world, people witness new discoveries daily.
In the series of such discoveries, a group of researchers at Princeton university has made effectively a laser,
According to the reports, the laser is prepared with the simulated atoms, notably known as quantum dots. The study is published in the Science journal.
Researchers created laser, while exploring the use of semiconductor material pieces as parts for quantum computing.
and not lasers. Quantum dots act like single atoms as segments for quantum computers. An associate professor of physics, Jason Petta at Princeton and the lead author of the study,
#Researchers developed hydrophobic metals using laser Engineers have spent decades studying super-hydrophobic surfaces because of the plethora of real-life applications.
or waterproof when they are treated with lasers. Researchers have found that repetitive laser blasts on the metal surface develop specific patterns that repel water efficiently.
A closer look at the surface reflects micro and nanoscale structures which causes water to bead effectively. he material is so strongly water-repellent the water actually gets bounced off.
These laser treated surfaces are highly absorbent of heat and light as well. Researchers say that this could be useful in the creation of rust-free solar panels that capture the sun energy
who uses lasers to study the speed of protein reconfiguration before aggregation.""In the lab,
#How lasers make metal super water repellent Scientists have used lasers to turn metals into extremely water repellent materials without the need for temporary coatings.
both of the University of Rochester Institute of Optics, describe a powerful and precise laser-patterning technique that creates an intricate pattern of micro
This work builds on earlier research by the team in which they used a similar laser-patterning technique that turned metals black.
Guo adds that one of the big advantages of his team process is that he structures created by our laser on the metals are intrinsically part of the material surface.
Unlike Guo laser-treated metals, the Teflon kitchen tools are not super-hydrophobic. The difference is that to make water to roll off a Teflon coated material,
Guo team had blasted previously materials with the lasers and turned them hydrophilic, meaning they attract water.
Guo team is now planning on focusing on increasing the speed of patterning the surfaces with the laser,
The process is distinct from micro laser sintering or direct metal laser sintering, both of which use a laser in combination with metal powders to create new structures.
The key to this breakthrough in printing metals seems to be using a higher energy laser than in previous attempts.
This allows for the creation of so-called"fast droplets"that quickly deform into flattened disks
when they impact the substrate. Earlier experiments used lower energy lasers, creating drops of metal that maintained a more spherical shape
and led to the creation of a stack that was less stable. The method still requires some refinement as the high-energy laser currently causes droplets to also land next to the desired placement location.
The process is distinct from micro laser sintering or direct metal laser sintering, both of which use a laser in combination with metal powders to create new structures.
The key to this breakthrough in printing metals seems to be using a higher energy laser than in previous attempts.
This allows for the creation of so-called"fast droplets"that quickly deform into flattened disks
when they impact the substrate. Earlier experiments used lower energy lasers, creating drops of metal that maintained a more spherical shape
and led to the creation of a stack that was less stable. The method still requires some refinement as the high-energy laser currently causes droplets to also land next to the desired placement location.
when excited by lasers as the electrons remain at an elevated state, it also provides a similar capability for efficient photon release in an electrically-heated situation."
Current chips are etched using an argon fluoride laser, which has a beam that is 193 nm wide.
however, in the form of a device that simply shines a laser on the user's finger.
a processor in the device is able to determine how much of the original laser light was absorbed by glucose,
while Audi and BMW have been testing laser headlamps that are significantly brighter than traditional xenon or LED options.
Most of the optical interconnect solutions employed within datacenters as of today are based upon vertical cavity surface emitting laser (VCSEL) technology,
Possibility to work with such displays provide lasers, that transmit airborne gases enough energy to heat the electrons
100,000 tiny holes drilled by lasers perforate its surface. He adds: fuel cell is like a battery, in a sense;
#'Nanostar'particles Make Cancer cells Light up Finding cancer cells might one day involve shining a laser onto a certain region of the body
When a laser hits one of the nanostars most of the light scatters with the same amount of energy.
because they give up some to the chemical bonds in the dye that coats the gold stars changing the way the dye looks under the laser light. 10 Technologies That Will Transform Your Life Ordinarily it would be difficult to see the change in the light
Kircher said seeing the precancerous cells light up under the laser was a bit of a surprise
and it's application said Andrey Kuzmin professor of physics at the Institute for Lasers Photonics
which lasers harden layers of liquid plastic, or resin, into three-dimensional shapes. This technique sets OWL's printers apart from other 3d printers on the market, such as Makerbot's Replicator or the Ultimaker 2, that use a process known as fused deposition modeling (FDM), not SLA.
In my own work as a chemistry researcher, my group invented a laser the size of a virus particle,
These tiny lasers are promising light sources that can be used to send and receive data with high bandwidths as well as to detect trace molecules or bio-agents.
and data obtained with matrix-assisted laser desorption/ionization (MALDI) chemical imaging analyses of serial sections of the same tissue.
and is particularly difficult for young children that don understand the purpose of it All the new technology relies on a special silica glass that has ions throughout that fluoresce in infrared in response to laser light.
Students and faculty at Vanderbilt University fabricated these tiny Archimedesspirals and then used ultrafast lasers at Vanderbilt and the Pacific Northwest National Laboratory in Richland, Washington,
The electrons at the center of the spirals are driven pretty vigorously by the laser electric field.
The blue light is exactly an octave higher than the infrared the second harmonic. he nano-spirals also have a distinctive response to polarized laser light.
when circularly polarized laser light is used. In circularly polarized light the polarization plane rotates either clockwise or counterclockwise.
such as highly efficient Light Emitting Diodes (LEDS), lasers and radio frequency components for cooling purposes. Graphene-based film could also pave the way for faster, smaller, more energy efficient, sustainable high power electronics."
While lasers can fit this requirement they are too energy-hungry and unwieldy to integrate into computer chips.
When a laser shines on the surface of a silver cube just 75 nanometers wide,
and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
While lasers can fit this requirement they are too energy-hungry and unwieldy to integrate into computer chips.
When a laser shines on the surface of a silver cube just 75 nanometers wide,
and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
They were excited with a focused continuous wave 532-nm laser. The violet DPA output in (a) swamps the green beam that is clearly seen in (b),
#Engineers demonstrate the world first white lasers More luminous and energy efficient than LEDS, white lasers look to be the future in lighting and Li-Fi,
or light-based wireless communication 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 l lasers are capable of emitting over the full visible color spectrum,
which is necessary to produce a white laser. This schematic illustrates the novel nanosheet with three parallel segments created by the researchers
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 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
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.
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.
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,
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
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
#Strength in numbers: Researchers develop the first-ever quantum device that detects and corrects its own errors Abstract:
"It was an exciting challenge to merge completely different results and approaches, such as ultrafast laser optics, photoelectron spectroscopies,
March 10th, 2015photonics/Optics/Lasers Innovative light therapy reaches deep tumors March 9th, 2015quantum sensor's advantages survive entanglement breakdown:
Solvents and their potential side effects are progressively being replaced by the likes of lasers, to removed dirt and varnish from paintings.
Rice U. researchers flex muscle of laser-written microsupercapacitors May 18th, 2015announcements Nanotherapy effective in mice with multiple myeloma May 21st, 2015turn that defect upside down:
Students and faculty at Vanderbilt University fabricated these tiny Archimedes'spirals and then used ultrafast lasers at Vanderbilt and the Pacific Northwest National Laboratory in Richland,
The electrons at the center of the spirals are driven pretty vigorously by the laser's electric field.
"The nano-spirals also have a distinctive response to polarized laser light. Linearly polarized light, like that produced by a Polaroid filter, vibrates in a single plane.
when circularly polarized laser light is used. In circularly polarized light, the polarization plane rotates either clockwise or counterclockwise.
2015photonics/Optics/Lasers A major advance in mastering the extraordinary properties of an emerging semiconductor: Black phosphorus reveals its secrets thanks to a scientific breakthrough made by a team from Universite de Montreal, Polytechnique Montreal and CNRS in France June 2nd, 2015new heterogeneous wavelength tunable laser diode for high-frequency efficiency June 2nd,
and ultrafast heat current created by picosecond--one trillionth of a second--pulses of laser light,"Cahill added."
#Sweeping lasers snap together nanoscale geometric grids: New technique creates multilayered, self-assembled grids with fully customizable shapes and compositions Down at the nanoscale,
an intensely hot laser swept across the sample to transform disordered polymer blocks into precise arrangements in just seconds."
"Our laser technique forces the materials to assemble in a particular way. We can then build structures layer-by-layer,
"Laser-assembled nanowires For the first step in grid construction, the team took advantage of their recent invention of laser zone annealing (LZA) to produce the extremely localized thermal spikes needed to drive ultra-fast self-assembly.
The sweeping laser's heat causes the elastic layer to expand--like shrinkwrap in reverse
"The direction of the laser sweeping across each unassembled layer determines the orientation of the nanowire rows,
"We shift that laser direction on each layer, and the way the rows intersect and overlap shapes the grid.
2015news and information Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
2015discoveries Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
2015announcements Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
2015imaging Robust new process forms 3-D shapes from flat sheets of graphene June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
2015robust new process forms 3-D shapes from flat sheets of graphene June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
4-D printing to advance chemistry, materials sciences and defense capabilities June 18th, 2015discoveries Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015sweeping lasers snap together
Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon, the common computer chip material June 29th,
Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon, the common computer chip material June 29th,
Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon, the common computer chip material June 29th,
Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon, the common computer chip material June 29th,
The method uses two lasers to measure the positions of opposite ends of a molecule,
Crucially, the JILA team verified the stability of the technique by using the two lasers to make two separate, independent measurements of a single sample.
if it is the sample or the lasers moving, Perkins explains.""This technology excites me because it opens the door to measuring the tiniest protein motions,
such as highly efficient Light Emitting Diodes (LEDS), lasers and radio frequency components for cooling purposes. Graphene-based film could also pave the way for faster, smaller, more energy efficient, sustainable high power electronics."
Replacing silver coating on catheters with graphene increases treatment effect July 9th, 2015photonics/Optics/Lasers Human color vision gives people the ability to see nanoscale differences July 9th
#Better memory with faster lasers DVDS and Blu-ray disks contain so-called phase-change materials that morph from one atomic state to another after being struck with pulses of laser light, with data"recorded"in those two atomic states.
When the laser light interacts with a phase-change material, its atomic structure changes from an ordered crystalline arrangement to a more disordered,
"Today, nanosecond lasers--lasers that pulse light at one-billionth of a second--are used to record information on DVDS and Blu-ray disks,
The speed with which data can be recorded is determined both by the speed of the laser--that is,
Thus, with a nanosecond laser,"the fastest you can record information is one information unit
people have started to use femtosecond lasers, which can potentially record one unit every one millionth of a billionth of a second.
regardless of the laser speeds used.""Even if there is a laser faster than a femtosecond laser,
there will be a limit as to how fast this transition can occur and information can be recorded, just because of the physics of these phase-change materials,
ROM storage, including CDS and DVDS, uses phase-change materials and lasers to store information. Although ROM records
2015nanocrystalline Thin-film Solar cells July 15th, 2015better memory with faster lasers July 14th, 2015cancer Nanospheres shield chemo drugs,
safely release high doses in response to tumor secretions July 14th, 2015better memory with faster lasers July 14th,
2015nanocrystalline Thin-film Solar cells July 15th, 2015better memory with faster lasers July 14th, 2015polymer mold makes perfect silicon nanostructures July 14th,
2015grants/Awards/Scholarships/Gifts/Contests/Honors/Records Nanocrystalline Thin-film Solar cells July 15th, 2015better memory with faster lasers July 14th, 2015simpore, Uofr,
or when it is shot with a nondestructive laser. Multilayer molybdenum disulfide, by contrast, is easier and less expensive to produce,
and industries, including laser, solar cells, production of transistors and nanomedicine. The colloid form of these particles have very interesting properties and characteristics,
As the beam hits these molecules, it can produce photons that have a different frequency from the laser light.
if scientists want to use a different laser to test the same molecules. In turn, this requires more chemical molecules and substrates,
have allowed snapshot imaging of a single 300 nm gold nanocrystal in the picosecond time interval after the particle was excited with a laser.
Snapshot projection images of a gold nanocrystal, 300nm across, before and after excitation with a femtosecond laser.
Students and faculty at Vanderbilt University fabricated these tiny Archimedes spirals and then used ultrafast lasers at Vanderbilt and the Pacific Northwest National Laboratory in Richland, Washington,
The electrons at the center of the spirals are driven pretty vigorously by the lasers electric field.
Haglund Lab/Vanderbilt) The nano-spirals also have a distinctive response to polarized laser light. Linearly polarized light,
when circularly polarized laser light is used. In circularly polarized light, the polarization plane rotates either clockwise or counterclockwise.
"In an article published in Scientific Reports("Direct laser-writing of ferroelectric single-crystal waveguide architectures in glass for 3d integrated optics),
"the group said it had employed ultrafast femtosecond lasers to produce a three-dimensional single crystal capable of guiding light waves through glass with little loss of light.
A polarized light field microscope image shows crystal junctions written inside glass with a femtosecond laser.
therefore essential for 3d laser-fabrication of PICS to achieve its full potential.""To pattern crystals in glass, the Lehigh-led group employed femtosecond lasers,
whose speed and precision make them useful for cataract and other eye surgeries. A femtosecond is one-quadrillionth,
Pulses emitted by femtosecond lasers last between a few femtoseconds and hundreds of femtoseconds. Scientists have been attempting for years to make crystals in glass in order to prevent light from being scattered as light signals are transmitted,
"The femtosecond laser provides several critical advantages, say Dierolf and Jain. The high intensity of the laser pulse enables nonlinear optical absorption.
The precise focus enables researchers to control where the laser is focused and where light is absorbed."
"The unique focus of the femtosecond laser also makes it possible to"write"the crystal inside the glass and not on its surface."
"Somehow, you have to get the laser inside the glass before you turn it on.
We do that by exploiting a property of the femtosecond lasers--that only at the focal point of the laser is there sufficient intensity to cause the change you want."
"If you double the intensity of the laser, you might get 20 to 100 times more absorption.
But now Fraunhofer researchers have developed a laser arc method with which layers of carbon almost as hard as diamond can be applied on an industrial scale at high coating rates and with high thicknesses.
Andreas Leson and Dr. Hans-Joachim Scheibe (left to right) successfully developed a laser arc method of depositing friction-reducing, wear-resistant coatings on components.
the laser arc method generates an arc between an anode and a cathode (the carbon) in a vacuum.
The laser arc method can be used to deposit very thick ta-C coatings of up to 20 micrometers at high coating rates.
Leson sees this as the first major step in using the laser arc method to save resources.
Andreas Leson, Hans-Joachim Scheibe and Volker Weihnacht received the 2015 Joseph von Fraunhofer Prize for the development of the laser arc method and the application of ta-C coatings
Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011