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:
In the research published in Nature Photonics, a collaboration including Itaru Osaka and Kazuo Takimiya of the RIKEN Center for Emergent Matter Science managed to create a type of polymer solar cell called a bulk-heterojunction solar cellhere the electron donor
The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists'ability to observe single molecules May 23rd,
The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists'ability to observe single molecules May 23rd, 2015aspen Aerogels to Present at the Cowen and Company Technology,
Joins IRT Nanoelec Silicon photonics Program May 21st, 2015govt. -Legislation/Regulation/Funding/Policy Who needs water to assemble DNA?
The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists'ability to observe single molecules May 23rd,201 0
head of Leti Optics and Photonics Department. eti technology breakthrough is the first demonstration of a high-brightness,
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 results are reported in a paper published online by the Journal of Nanophotonics on May 21."
For example, when they are illuminated with infrared laser light, they emit visible blue light. A number of crystals produce this effect, called frequency doubling or harmonic generation, to various degrees.
When infrared laser light strikes the tiny spirals it is absorbed by electrons in the gold arms.
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.
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
2015production of Nanocomposites by Using Direct Nano-Welding of Micromaterials in Iran June 4th, 2015environmental Issues to Hamper Growth of Global Nanocomposites Market June 4th, 2015optical computing/Photonic computing New
heterogeneous wavelength tunable laser diode for high-frequency efficiency June 2nd, 2015entangled photons unlock new supersensitive characterisation of quantum technology June 1st, 2015stanford breakthrough heralds super-efficient light-based computers:
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,
2015entangled photons unlock new supersensitive characterisation of quantum technology June 1st, 2015ucf Research and Innovation Recognized at International Conference May 31st,201 0
and ultrafast heat current created by picosecond--one trillionth of a second--pulses of laser light,"Cahill added."
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
The study was supported by the National Science Foundation under the Electronics, Photonics, and Magnetic Devices program (ECCS-1307948) and Physics of Living Systems program (PHY-1411445),
#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
and the College of Optics and Photonics (CREOL) has developed a technique for creating the world first full-color,
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,
The scattered light is detected by a common photodiode, and the signals are digitized, analyzed and used to calculate the positions of the samples.
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,
the team developed a smart surface with nanocavities that fit the particular target glycoprotein. To create the nanocavities,
the sugar part of the prostate cancer glycoprotein is reacted with a custom-designed molecule that contains a boron group at one end (the boron linkage forms a reversible bond to the sugar).
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
"We are developing photodetectors based on this technology and, for example, it could be helpful for photographers wanting to shoot better quality pictures in weak light conditions,
#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.
Using ultrafast laser pulses that speed up the data recording process, Caltech researchers adopted a novel technique, ultrafast electron crystallography (UEC),
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.
when it is hit by a femtosecond laser pulse. In UEC, a sample of crystalline Gete is bombarded with a femtosecond laser pulse,
followed by a pulse of electrons. The laser pulse causes the atomic structure to change from the crystalline to other structures
and then ultimately to the amorphous state. Then, when the electron pulse hits the sample, its electrons scatter in a pattern that provides a picture of the sample's atomic configuration as a function of the time.
the structural shift in Gete caused by the laser pulses. However, they also saw something more:
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,
In a study published July 13 in Nature Communications, scientists from Rice's Laboratory for Nanophotonics (LANP) describe a new method that solar-panel designers could use to incorporate light-capturing nanomaterials into future designs.
and industries, including laser, solar cells, production of transistors and nanomedicine. The colloid form of these particles have very interesting properties and characteristics,
electronics and photonics after passing the required tests and obtaining mass-production of these nanoparticles.
Perry and colleagues in Georgia Tech's Center for Organic photonics and Electronics (COPE) had been working on other capacitor materials to meet these demands
The device brings researchers closer to producing silicon photonic chips that compute and shuttle data with light instead of electrons.
Electrical and computer engineering associate professor Rajesh Menon and colleagues describe their invention today in the journal Nature Photonics Silicon photonics could significantly increase the power and speed of machines such as supercomputers
And because photonic chips shuttle photons instead of electrons, mobile devices such as smartphones or tablets built with this technology would consume less power,
The first supercomputers using silicon photonics--already under development at companies such as Intel and IBM--will use hybrid processors that remain partly electronic.
A Universal Surface-Enhanced Raman Spectroscopy Substrate for All Excitation Wavelengths"),the photonics advancement aims to improve our ability to detect trace amounts of molecules in diseases, chemical warfare agents, fraudulent
When a powerful laser interacts chemical and biological molecules, the process can excite vibrational modes of these molecules and produce inelastic scattering, also called Raman scattering, of light.
As the beam hits these molecules, it can produce photons that have a different frequency from the laser light.
While rich in details, the signal from scattering is weak and difficult to read without a very powerful laser.
if scientists want to use a different laser to test the same molecules. In turn, this requires more chemical molecules and substrates,
enabling the excitons to be captured experimentally by a newly developed multidimensional multiphoton photoemission spectroscopic technique.
and they contain laser technology (developed by the University of Hertfordshire) to detect particulates from cars and lorries.
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 results are reported in a paper published online by the Journal of Nanophotonics("Efflcient forward second-harmonic generation from planar archimedean nanospirals".
For example, when they are illuminated with infrared laser light, they emit visible blue light. A number of crystals produce this effect, called frequency doubling or harmonic generation, to various degrees.
When infrared laser light strikes the tiny spirals it is absorbed by electrons in the gold arms.
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.
The group says its achievement will boost ongoing efforts to develop photonic integrated circuits (PICS) that are smaller, cheaper, more energy-efficient and more reliable than current networks that use discrete optoelectronic components--waveguides, splitters, modulators, filters
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."
"We can heat the glass only locally, "says Jain, "creating the desired conditions and causing the glass to melt,
"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.
A pulsed laser controls the light arc In a similar style to old-fashioned film projectors, the laser arc method generates an arc between an anode and a cathode (the carbon) in a vacuum.
The arc is initiated by a laser pulse on the carbon target. This produces a plasma consisting of carbon ions,
which is deposited as a coating on the workpiece in the vacuum. To run this process on an industrial scale,
a pulsed laser is scanned vertically across a rotating graphite cylinder as a means of controlling the arc.
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
researchers use the term"nanophotonics"-so the prefix"nano"is used not here just as a fad!
and Tunable Microtectonic Zno-Based Sensors and Photonics")."These transparent, flexible electronics which can be worn as skin patches
These droplets are made by melting a thin metal film using a pulsed laser. Their work is published in Advanced Materials 3d printing is a rapidly advancing field,
They used laser light to melt copper and gold into micrometre-sized droplets and deposited these in a controlled manner.
In this method, a pulsed laser is focused on a thin metal film. that locally melts and deforms into a flying drop.
High energy In this study, the researchers used a surprisingly high laser energy in comparison to earlier work,
In previous attempts, physicists used low laser energies. This allowed them to print smaller drops,
They had predicted previously this speed for different laser energies and materials. This means that the results can be translated readily to other metals as well.
One remaining problem is that the high laser energy also results in droplets landing on the substrate next to the desired location.
#3d potential through laser annihilation (Nanowerk News) Whether in the pages of H g wells, the serial adventures of Flash gordon,
or that epic science fiction saga that is Star wars, the appearance of laser beamsor rays or phasers or blastersultimately meant the imminent disintegration of our hero
Phay Ho, Chris Knight and Linda Young, Argonne National Laboratory) Today we recognize the laser is reality beyond science fiction,
Yet, harnessing the once-fabled destructive capabilities of certain lasers is proving invaluable on the path toward scientific discovery.
The x-ray electron-free laser (XFEL) is the perfect example of new technology and old perceptions converging on that narrow boundary between science and science fiction.
#Sweeping lasers snap together nanoscale geometric grids Down at the nanoscale, where objects span just billionths of a meter,
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 expandike shrinkwrap in reversehich pulls
"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.
The new technique may also impact photonics on silicon, with active photonic components integrated seamlessly with electronics for greater functionality.
Now, a team of scientists of the Laser spectroscopy Division of Prof. Theodor W. Hnsch (Director at the Max Planck Institute of Quantum Optics and Chair for Experimental Physics at the Ludwig-Maximilians-Universitt Munich) has developed a technique
MPQ, Laser spectroscopy Division) Spectroscopic measurements on large ensembles of nanoparticles suffer from the fact that individual differences in size, shape,
Laser light is coupled into the resonator through this fibre. The plane mirror is moved point by point with respect to the fibre
and the College of Optics and Photonics (CREOL) has developed a technique for creating the world first full-color,
This particular electromagnetic spectral range of LWIR is important for a range of applications such as LIDAR (light radar) systems,
#Making new materials with micro-explosions (Nanowerk News) Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon,
"Experimental evidence of new tetragonal polymorphs of silicon formed through ultrafast laser-induced confined microexplosion").
or phases, in silicon and seen indications of potentially four more,"said Professor Rode, a laser physicist at the ANU Research School of Physics and Engineering (RSPE)."
By focusing lasers onto silicon buried under a clear layer of silicon dioxide, the group have perfected a way to reliably blast tiny cavities in the solid silicon.
they are guided by a deep understanding of how lasers interact with matter, "he said. Conventional methods for creating materials with high pressure use tiny diamond anvils to poke
However, the ultra-short laser micro-explosion creates pressures many times higher than the strength of diamond crystal can produce.
A laser measures this deflection, and models convert the data to reveal information about the materials composition.
#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.
Using ultrafast laser pulses that speed up the data recording process, Caltech researchers adopted a novel technique, ultrafast electron crystallography (UEC),
"When the laser light interacts with a phase-change material, its atomic structure changes from an ordered crystalline arrangement to a more disordered,
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.
when it is hit by a femtosecond laser pulse. In UEC, a sample of crystalline Gete is bombarded with a femtosecond laser pulse,
followed by a pulse of electrons. The laser pulse causes the atomic structure to change from the crystalline to other structures,
and then ultimately to the amorphous state. Then when the electron pulse hits the sample, its electrons scatter in a pattern that provides a picture of the sample's atomic configuration as a function of the time.
the structural shift in Gete caused by the laser pulses. However, they also saw something more:
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
#Photonic crystal fibre: a multipurpose sensor Glass fibres can do more than transport data. A special type of glass fibre can also be used as a high-precision multipurpose sensor,
as researchers at the Max Planck Institute for the Science of Light (MPL) in Erlangen have demonstrated now("Flying particle sensors in hollow-core photonic crystal fibre").
which can literally sense different physical quantities such as electric field, temperature or vibrations through the inside of this hollow-core photonic crystal fibre.
which flies through the hollow channel in the interior of a photonic crystal fibre to measure different physical quantities, for example the electric field along the optical fibre.
Two laser beams manoeuvre a microbead through a hollow glass fibre In photonic crystal fibres (PCFS), which were invented around 20 years ago by Philip Russell, Director at the Max Planck Institute for the Science of Light,
The special properties of photonic crystal fibre, however, enable several applications that are not possible with conventional optical fibres.
whether hollow-core photonic crystal fibres are suitable as sensors by initially using the fibres to measure electric fields, vibrations and temperatures.
This was achieved by sending a laser beam through the channel from each end of the fibre.
By setting the power of the two laser beams to different strengths, the bead was pushed in one direction slightly more than in the other and moved through the fibre at a specific speed.
and thus reflects more laser light to the side than in the normal position. This light attenuation is measured by a photodiode at one end of the fibre.
The loss here is proportional to the strength of the electric field, and it is thus possible to determine the field from a distance.
the physicists illuminate the bead with an additional, weak laser. They use the Doppler effect here,
as the laser light experiences losses as it is transmitted in the PCF, and thus the glass bead can no longer be trapped above a certain length.
"We are developing photodetectors based on this technology and, for example, it could be helpful for photographers wanting to shoot better quality pictures in weak light conditions,
The condensate is created by first exciting a sufficient number of polaritons using a laser and then observed via the blue light it emits.
The condensate is created by first exciting a sufficient number of polaritons using a laser and then observed via the blue light it emits.
Toward future polariton lasers and optical transistors In a condensate, the polaritons all behave the same way, like photons in a laser.
The study of room-temperature condensates paves the way for future technological breakthroughs such as polariton micro-lasers using low-cost organic materials,
and require less activation power than conventional lasers. Powerful transistors entirely powered by light are another possible application.
so that the external laser used for pumping could be replaced by more practical electrical pumping. Fertile ground for studying fundamental questions According to Professor Maier, this research is also creating a platform to facilitate the study of fundamental questions in quantum mechanics."
and could form the basis of optical computing. At its most basic level, your smart phone's battery is powering billions of transistors using electrons to flip on and off billions of times per second.
While lasers can fit this requirement they are too energy-hungry and unwieldy to integrate into computer chips.
This so-called plasmonic device could one day be used in optical computing chips or for optical communication between traditional electronic microchips.
When a laser shines on the surface of a silver cube just 75 nanometers wide,
"There is great interest in replacing lasers with LEDS for short-distance optical communication, but these ideas have always been limited by the slow emission rate of fluorescent materials,
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