#Researchers learn how to steer the heart--with light We depend on electrical waves to regulate the rhythm of our heartbeat.
or parabolic mirrors are used in a host of technical applications ranging from satellite dishes to laser resonators,
an associate professor of the Institute of Laser Engineering at Osaka University, in cooperation with Screen Holdings Co.,Ltd.
succeeded in visualizing changes in defect density on the surface of Gan through the laser terahertz emission microscope (LTEM)
Furthermore, from results measurement through modification of excited lasers, it was confirmed that THZ emission needs excitation light with larger energy than the band gap energy y
#This new high-power diamond laser can cut steel Although lasers based on diamond have been around around for several years,
they have never been very powerful. That beginning to change now as new CVD fabrication methods provide larger,
and the MQ Photonics Research Centre in Australia, have built just a diamond laser with 20 times more power than anything yet to date.
While lesser lasers have made similar claims without the actual watts behind them no amount of focussing
and you need to-switchyour laser to compress the all the power into impossibly brief pulses just to make a mark,
More typical workhorse solid state lasers, like Yb-doped disk and fiber lasers, can routinely deliver kilowatt range power.
The new diamond lasers make use of something known as Raman conversion to shift light to wavelengths that are long enough to be absorbed efficiently by steel.
The release stories for this laser mention that the infrared wavelengths used here are safer for the eye than either visible or UV radiation.
It also appears to be fashionable to compare output power of cutting lasers to laser pointers,
with many noting that the new diamond laser is equal to 00,000 laser pointers. In light of the ample variance in both wavelength and power of pointer devices, those kinds of comparisons should probably be taken as rough.
Diamond lasers can potentially unleash more than just new cutting or machining technologies. Since silicon doesn reflect x-rays
It would seem that these trends should soon make off-the-shelf diamond lasers fairly commonplace a
while testing a laser-based measurement technique that they recently developed to look for what is called multipolar order.
This is all done by the sensor. ne prototype based on this model synchronizes a laser projector with a common rolling-shutter camerahe type of camera used in most smartphoneso that the camera detects light only from points being illuminated by the laser as it scans across the scene.
But as a projector scans a laser across the scene, the spots illuminated by the laser beam are brighter,
The coherent laser light from the NCI acts as a kind of ruler, measuring the precise distance of each point from the camera so that they can be mapped onto a 3d image of the scene.
Contrary to collimated emitters (lasers), the Leddar sensor's LEDS and emitter optics are used to create a diffuse beam covering a wider area of interest.
pulse-shaped laser to provide the ultrafast flashes of light, along with an ultra-sensitive pulse detector to capture the speed of conversion to electrical energy.
And, as the electrons in the laser-excited graphene do not cool down rapidly because they do not easily recouple with the graphene lattice,
One laser-etched design was inspired by the narrow, overlapping scales of a python. The other design had arranged scales in wider-spaced
and are activated then with focused lasers. However, the procedure gets tricky when it comes to cells deep inside the body.
which shines a laser into the patient eye and measures the refracted light with a photon sensor to find optical aberrations that affect eyesight.
Known as the Compact Laser weapons System, the futuristic, drone-shooting weapon is a smaller, more versatile version of the High energy Laser Mobile Demonstrator (HEL MD),
In a recent test, the laser, which is compact enough to carry around in a suitcase,
The laser gun acts quickly (it took just 15 seconds for it to shoot the test drone out of the sky) and discreetly, according to Neal.
"If you were on the receiving end of laser energy, you would have no idea where it was coming from or
a chiller that keeps the system from getting too hot, a 2-kilowatt laser and a"beam director"that points the laser light at the intended target.
who noted that this lower weight makes the portable laser gun easier to move around than the HEL MD
While the bigger system features a more powerful, 10-kw laser, it's fixed to the top of a vehicle,
In the recent test in California, the smaller laser shot down a drone, but Boeing's goal is to develop a compact laser that can also shoot down incoming explosives, such as mortars,
missiles and smaller artillery something the HEL MD has already proved it can do in tests.
The only cost associated with operating them is the cost of electricity to power the lasers, according to Boeing,
which did not state exactly how much the U s. military would save by switching to laser guns.
This research outcome potentially allows for great flexibility in the design and optimization of electronic and optoelectronic devices like solar panels and telecommunication lasers.
so we solved the conundrum. ext they dyed the sample with 14 different dyes in a narrow emission window and excited and photoswitched the molecules with one laser.
This optical universal detector is already being used at the HZDR for the exact synchronization of the two free-electron lasers at the ELBE Center for High-power Radiation Sources with other lasers.
where researcher take one laser for the excitation of a material("pump) "and then use a second laser with a different wavelength for the measurement("probe").
"The laser pulses must be synchronized exactly for such experiments. So the scientists are using the graphene detector like a stopwatch.
This optical universal detector is already being used at the HZDR for the exact synchronization of the two free-electron lasers at the ELBE Center for High-power Radiation Sources with other lasers.
where researcher take one laser for the excitation of a material("pump) "and then use a second laser with a different wavelength for the measurement("probe").
"The laser pulses must be synchronized exactly for such experiments. So the scientists are using the graphene detector like a stopwatch.
increasing the velocity of particle transport by 100 times by applying an alternating current electric field in conjunction with heating the plasmonic nanoantenna using a laser to induce a force far stronger than otherwise possible."
""Then, once we turn off the electric field the laser holds the particles in place, so it can operate in two modes.
The laser traps the particles, making it possible to precisely position them. The technique was demonstrated with polystyrene particles i
the authors make it possible to convert the incoming laser light into extremely localised heat. These gold nanoparticles can
using a laser as the energy source. The novelty of this study is that it shows that it is possible to use diamond nanocrystals as hypersensitive temperature sensors with a high spatial resolution-ranging from 10 to 100 nanometers-to monitor the amount of heat delivered to cancer cells s
The modular aspect of the system makes it possible to accommodate various radiation sources such as tunable lasers and non-coherent monochromatic or polychromatic sources s
which laser light is irradiated on a ultra-thin metal point. This creates highly bundled light-a hundred times smaller than the wavelength of light,
By observing the back-scattered portion of the laser light, one can achieve a spatial resolution in the order of the near-field magnitude, that is, in the nanometer range."
The sample can be stimulated with laser, pressure, electric field or magnetic field pulses. The principle was tested at the HZDR on a typical laboratory laser as well as on the free-electron laser FELBE.
First tests on the new terahertz source TELBE which provides extremely short electric and magnetic field pulses for excitation,
"Next they dyed the sample with 14 different dyes in a narrow emission window and excited and photoswitched the molecules with one laser.
and professors Randy Headrick and Madalina Furis, deployed this table-top scanning laser microscope. Their latest finding is reported in the journal Nature Communications--and may
the UVM team--with support from the National Science Foundation--built a scanning laser microscope,
At the Frontiers in Optics conference researchers will describe a custom-built ultrafast laser that could help image everything from semiconductor chips to cells in real time Using ultrafast beams of extreme ultraviolet light streaming at a 100,000 times a second, researchers
Over the last ten years, researchers have developed smaller, cheaper machines that pump out coherent, laser-like beams in the laboratory setting.
Zürch and a team of researchers from Jena University used a special, custom-built ultrafast laser that fires extreme ultraviolet photons a hundred times faster than conventional table-top machines.
The ultrafast laser also overcame another drawback of conventional table-top light sources: long exposure times.
Prototype on-chip networks have used semiconductor lasers as light emitters. They can modulate very quickly,
What's more, semiconductor lasers are not particularly efficient. They produce a lot of heat along with light
In this initial experiment, the researchers used a laser to zap the VO2 and cause it to change phase.
A faster means of changing the VO2 phase--perhaps using electricity instead of a laser--could make the system much faster still.
while testing a laser-based measurement technique that they recently developed to look for what is called multipolar order.
which appeared in the 1960-s, simultaneously with the invention of lasers. Photonics has the same goals as electronics does,
--We used our femtosecond laser complex acquired as part of the MSU development program"."Eventually, researches developed a"device":
but laser light is not able to spatially resolve atoms. Scientists from the Laboratory for Attosecond Physics at LMU and MPQ have succeeded now in producing ultrashort electron pulses with a duration of only 28 femtoseconds.
then used lasers to cool them to within a few degrees of absolute zero. These are the key prerequisites for making an object behave according to quantum principles.
Widely-used technologies, such as laser cooling, that work for atoms won't work for such large objects,
During cavity cooling, a particle is suspended by a laser light field contained between two mirrors, which has a very carefully calibrated wavelength.
The laser light can hold the particle steady (a phenomenon known as optical tweezing) and draw motional energy out of it at the same time.
However since the laser light can sometimes actually heat the objects up this method has not been shown to work before."
and developing certain types of lasers. So we have shown that we can selectively enhance or inhibit this interaction,
Like any good sensor, the NV centers are almost completely non-invasivetheir read-out with laser light does not disturb the sample they are sensing.
Probing a nitrogen vacancy requires zapping it with laser light, which it absorbs and re-emits.
To do this, the researchers used a combination of ultrafast pulse-shaped laser excitation and highly sensitive electrical readout.
The photoacoustic imager contains a red laser, which shines pulses of light into the animal.
as blood cells absorb most laser light. The UCL scientists have engineered genetically tumour cells so they create tyrosinase,
This turns the cells dark brown so they absorb light from the laser and can be detected by the photoacoustic device.
#New 2d transistor material made using precision lasers Molybdenum ditelluride (Mote2) is a crystalline compound that
They directed a 1 m wide laser (a human hair is 17 to 181 m) at the 2h-Mote2
#Using lasers to tailor the properties of graphene Carbon nanomaterials display extraordinary physical properties, outstanding among any other substance available,
The researchers from Technological Center AIMEN explore the use of ultrafast lasers as tool for graphene processing.
It enough a single pulse of laser, with a duration of several picoseconds the time of a single oscillation in a polar molecule, like water.
As the laser spot can be focused in areas of one square micron or less, direct writing of devices on graphene can be done with high precision,
"the work of AIMEN researches demonstrated laser based large scale patterning of graphene at high speed and resolution, opening new possibilities for device making.
The Laser Applications Centre of AIMEN is devoted to applied research in the field of laser materials processing,
being the largest Spanish laser center in terms of research personnel and investment. The work leading to these results was held within the European FAIERA project, funded by the European union Seventh Framework Programme (GA 316161), under the Research Potential initiative REGPOT in the Capacities Programme a
"This silicon nanodevice can funnel laser light to a tightly focused spot and probe biological molecules to explore their potential use as new drugs.
such as gold and silver, are used in laser light devices because they have the ability to capture individual photons of light.
and optimization of electronic and optoelectronic devices like solar panels and telecommunication lasers. black phosphorus To truly understand the significance of the team's findings,
should help inform future investigations involving ultrafast laser physics. ttosecond science is still a new field,
Over the last ten years, researchers have developed smaller, cheaper machines that pump out coherent, laser-like beams in the laboratory setting.
Zürch and a team of researchers from Jena University used a special, custom-built ultrafast laser that fires extreme ultraviolet photons a hundred times faster than conventional table-top machines.
The ultrafast laser also overcame another drawback of conventional table-top light sources: long exposure times.
when a laser is directed at them, causing the capsule to burst and release its contents.
How hot the gold rods become depends on matching their size with the color of the laser light used.
and by employing different colored lasers. Because the capsules are printed 3d, they can be arranged within the gel in practically any design that can be created on a computer.
noninvasive 3d biomedical imaging photonic chips aerospace photonics micromachines laser tweezing the process of using lasers to trap tiny particles.
he newly demonstrated laser nano-patterning method in graphene oxides holds the key to fast processing and programming of high capacity information for big data sectors.
#Ultrafast lasers offer 3-D micropatterning of biocompatible hydrogels Tufts University biomedical engineers are using low energy,
The laser-based micropatterning represents a new approach to customized engineering of tissue and biomedical implants.
femtosecond laser to generate scalable, high-resolution 3-D voids within silk protein hydrogel, a soft,
Further, the exceptional clarity of the transparent silk gels enabled the laser's photons to be absorbed nearly 1 cm below the surface of the gel-more than 10 times deeper than with other materials
No radiation The new fusion process can take place in relatively small laser-fired fusion reactors fuelled by heavy hydrogen (deuterium.
which includes a photovoltaic cell using a high-quality semiconductor crystal similar to the ones for lasers
rather than solely to the laser's wavelength, demonstrating that the plasmons effectively nudged the electrons in Mos2 into a different energy state."
When the uncovered end of the wire was exposed to a laser, the energy was converted into plasmons, a form of electromagnetic wave that travels through oscillations in electron density.
By scanning the wire bit-by-bit with a laser--a process known as raster scanning--the researchers were able to measure current at each point along the wire,
They also found that the device was sensitive to the laser's excitation wavelength, and performance was limited at shorter wavelengths due to ineffective plasmon propagation and at longer wavelengths due to the band gap of molybdenum disulfide."
the physics of optical diffraction limit how small a laser spot can be used, which ultimately limits the resolution of the technique.
Wong's team conceived an all-optical scheme that focuses electron pulses in three dimensions by using a special type of laser mode with an intensity"valley"(or minimum) in its transverse profile,
the laser-electron interaction accelerates the back electrons and decelerates the front electrons. As the electrons propagate,
In other words, a laser can be pointed directly at an object and while the polarization angle may change,
#Mini X-ray source driven by laser light alone A new method to produce three-dimensional images of soft tissue structures in organisms using laser-generated X-rays
and the Technische Universität München (TUM) have captured three-dimensional images of ultrafine structures in the body of a living organism for the first time with the help of laser-generated X-rays.
By contrast, the laser-driven system in combination with phase-contrast X-ray tomography only requires a university laboratory to view soft tissues.
A laser-driven plasma wave accelerates and wiggles electrons, giving rise to a brilliant kev X-ray emission. his so-called betatron radiation is emitted in a collimated beam with excellent spatial coherence and remarkable spectral stability.
Our results suggest that laser-based X-ray technology offers the potential for filling the large performance gap between synchrotron-and current X-ray tube-based sources.
For the first time, the researchers combined their laser-driven X-rays with a phase-contrast imaging method developed by a team headed by Prof.
This laser-based imaging technique enables creation of three-dimensional images of objects. After each X-ray pulse, meaning after each frame,
a laser is used to induce fluorescence. This detection mode is not only highly sensitive, but it can also generate a wide range of information about the type and behavior of the marked biomolecules.
Creating such a spectrum with many individual lasers is technically complex, expensive and less precise than from an integrated source.
the researchers shone laser light into a waveguide, made of silicon nitride, a glass-like material, embedded in regular glass (silicon dioxide).
The shape and construction of the waveguide ensures that the laser light generates new wavelengths as it passes through;
The research was performed by scientists from the Laser Physics and Nonlinear Optics department of UT research institute MESA+(within the strategic research direction Applied Nanophotonics) in collaboration with the Westfälische Wilhelms-Universität (WWU) Münster and the companies Lionix and Xio Photonics.
#Laser array on silicon promises new level of photonic integration Scientists in Belgium are claiming a breakthrough advance for integrated photonics by fabricating an array of laser diodes on a large silicon wafer typical
And while the laser structures have so far only been demonstrated with optical pumping, the team led by Ghent Dries Van Thourhout suggests that electrical injection-a necessity for true photonic integration-could be achieved readily with the incorporation of a suitable blend of narrow-bandgap semiconductor material in the future.
Van Thourhout and colleagues made an array of distributed feedback (DFB) indium phosphide (Inp) lasers on a 300 mm diameter wafer,
Add to that a very high-yielding process (the team claims that at least 98 per cent of more than 200 devices characterized so far have showed laser operation)
Learning from recent attempts to combine III-V and silicon materials in Finfet electronic devices, the Belgian team grew their laser structures directly onto a standard silicon wafer.
we fabricated DFB lasers exhibiting robust single-mode operation. Thin buffer layer crucial The usual way to overcome the lattice mismatch between silicon
The result was an Inp-on-silicon array of DFB lasers emitting at between 915 nm
YAG laser provided by Ekspla. Although that is not the ideal lasing wavelength for silicon waveguides,
Van Thourhout and colleagues outlined how these challenges could be met. he in-plane laser configuration employed makes it straightforward to adopt well-studied electrical injection schemes,
it is even possible to envisage butt-coupling the lasers to optical waveguides defined at the same level. n addition,
direct contact of the III lasers with silicon-on-insulator (SOI) wafers will improve the thermal dissipation of the device,
on-chip lasers that could be produced using the approach, concluding that: n particular, for on-chip optical interconnects, the demonstrated monolithic laser array,
together with the WDM technology, may finally pave the way to terascale computing. Photonic integrated circuits (PICS) based on the technology could dramatically change the architecture of fiber-optic transceivers used in data center optical interconnects, by pushing down the cost of chip-level data transfer between logic and memory devices.
Importantly, the laser integration work was carried out in IMEC 300mm CMOS pilot line facility, providing a path to large volume manufacturing
IMEC says that efforts are focused now on growing the more complex semiconductor layer stacks needed for electrical injection of the lasers and emission in the 1300 nm wavelength range d
#Microscale 3d'Bar codes'Readable with Lasers Microscale indentations that can be read by laser scanners serve as 3d bar codes that could help distinguish between genuine and counterfeit goods. A prototype device for creating the bar codes has been developed by Sofmat Ltd
and a laser-scanning confocal microscope to characterize the surface of the coded product and ensure the code is reproduced accurately."
Because of the newfound clarity of the material, it could also work in lasers, protecting the components inside a directed energy weapon from the ravages of sea or sand while still letting the laser shine through.
Now that the Navy has developed a reliable means of manufacturing the material, the next step is handing it off to industry and seeing
AVERT's deployment unit can scan locations of a targeted vehicle using laser-based LIDAR,
#Boeing Just Patented A Force field Made Of Lasers So, Boeing just patented a force field. Technically, the patent is for a ethod and system for shockwave attenuation via electromagnetic arc,
Next, the signal from the sensor triggers a laser (or a blast of electricity or microwave energy) that heats up a section of air or water
The liquid metal could be used to build self contained pumps that don't require outside power or batteries, saving on weight and complexity for items like night vision and laser cooling pumps.
But a quick laser scan could prove a product origin, which the engineers say could track
Prototype on-chip networks have used semiconductor lasers as light emitters. They can modulate very quickly,
What's more, semiconductor lasers are not particularly efficient. They produce a lot of heat along with light
In this initial experiment, the researchers used a laser to zap the VO2 and cause it to change phase.
A faster means of changing the VO2 phase--perhaps using electricity instead of a laser--could make the system much faster still.
Specifically, the research team used the surface waves of Linbo3 to listen to how the illumination of Linbo3 by laser light changes the electric properties of Mos2. he tone at
and infer how much current the laser light allowed to flow in the Mos2. We also fabricated transistor structures onto the Mos2 films
while testing a laser-based measurement technique that they recently developed to look for what is called multipolar order. o understand multipolar order,
This scans the print with a laser, particles in the powder are ionised vaporised and, and a molecular profile appears.
pulses of a laser can be sent down the guide, where they can interact with the GST
The new device, called a biophotonic laser-assisted surgery tool, or BLAST, is a silicon chip with an array of micrometer-wide holes,
A laser can scan the entire silicon chip in about 10 seconds. Chiou said the key to the technique's success is the instantaneous and precise incision of the cell membrane."
To do this, the researchers used a combination of ultrafast pulse-shaped laser excitation and highly sensitive electrical readout.
Supporting data were collected with two-dimensional infrared spectroscopy, an advanced laser technique that combines ultrafast time resolution with high sensitivity to chemical structure.
#Printing silicon on paper, with lasers Recently, a group of researchers at Delft University of Technology,
The laser blast only lasted a few tens of nanoseconds, leaving the paper completely intact. In testing its conductive performance,
Ishihara and his colleagues found that thin-film transistors using the laser-printed layer exhibited mobilities as high as those of conventional poly-silicon conductors.
when a two-dimensional array of nanometer-sized gold metamaterial resonators is illuminated by a tunable near-infrared femtosecond laser,
#Generating broadband terahertz radiation from a microplasma in air Researchers have shown that a laser-generated microplasma in air can be used as a source of broadband terahertz radiation.
They demonstrate that an approach for generating terahertz waves using intense laser pulses in air can be done with much lower power lasers, a major challenge until now.
Researchers at the University of Rochester's Institute of Optics have shown that a laser-generated microplasma in air can be used as a source of broadband terahertz radiation.
Fabrizio Buccheri and Xi-Cheng Zhang demonstrate that an approach for generating terahertz waves using intense laser pulses in air--first pioneered in 1993--can be done with much lower power lasers, a major challenge until now.
He adds that this can be generated using specific terahertz devices, such as diodes or lasers. However, for spectroscopy applications,
requires powerful, expensive lasers. The"one-color"approach uses single laser frequency to generate the plasma.
it required even higher laser energies and therefore it was explored not further until this recent paper by Buccheri and Zhang.
if by creating a plasma with a laser in one of these"weirder"polarization states
"He adds that he was then able to exploit the physics to use lower laser energies than previously thought possible to generate broadband terahertz waves in air.
He thinks that fine tuning the type of laser used and changing the air to a different gas could enable even lower operation powers.
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