Breaking barriers with nanoscale lasers
... has been thought to be limited to one-half of the wavelength
For instance, for lasers used in optical communications the required wavelength
is about 1,500 nanometers, so a 750-nanometer ... make a laser as thin as about one quarter of the wavelength
or smaller, as opposed to one half."
Ning and ...
MIT: New method could lead to narrower chip patterns
... simultaneously. When the bright lines at one wavelength
coincide with the dark lines at the other ... then serves as a mask through which the first wavelength
illuminates a layer of material underneath, ... that are only about one-tenth as wide as the wavelength
of light used to create them. Part of the trick ...
New Dual Wavelength X-ray Diffractometer From Oxford Diffraction, Now a Part of Varian, Inc., Allows Increased Throughput for Challenging Single Crystal Analyses
(NasdaqGS: VARI) introduced its new dual wavelength
for the analysis of small ... and proteins. The SuperNova(TM) is the
first dual wavelength
diffraction system to use entirely high ... and
copper wavelength. It is the first dual wavelength
purely high intensity Mo and ...
Cynosure Introduces Smartlipo MPX(TM) Dual Wavelength Workstation for LaserBodySculpting(SM)
... unique characteristics. The
20 watt 1064-nm wavelength
disrupts a broad region of tissue while heating
the treated areas evenly. The 1064-nm wavelength
also mediates blood vessel
coagulation enhancing hemostasis. The 12 watt 1320-nm wavelength
concentrated with minimal scatter, and ...
New filter clears up fiber optic communications
"There are up to 160 wavelength
channels traveling through an optical fiber
at ... channels, it's necessary to drop off individual wavelength
different points on the fiber. At ... to be able to add
data streams into unfilled wavelength
"When the data being transported in ...
Harvard University engineers demonstrate quantum cascade laser nanoantenna
... with spatial resolution much smaller than the wavelength
that can provide images of materials, and in ... of bulky lasers with very limited tunability and wavelength
By combining Quantum Cascade Lasers ... the thickness of the layers one can select the wavelength
of the QC laser across essentially the entire ...
Tsunami invisibility cloak, dark energy v. the void, sorting nanotubes with light, and more
... a meta-screen, designed to focus light into tiny spots smaller than the wavelength
of the photons in use. These sub-wavelength spots overcome the diffraction ... slots cut into a metallic screen, each narrowly spaced (less than half a wavelength
apart) and of a precise length. They found that screen was able to ...
Cardiff University engineers give industry a moth's eye view
... is one millionth of a millimetre). They need to be smaller than the wavelength
of light to avoid disrupting the light as it enters the lens.
The ... the nanoscopic structures on the lens surfaces had to be smaller than the wavelength
of light so as to smooth out the sharp refractive index change as the ...
Taming tiny, unruly waves for nano optics
... close together (sometimes as close as 10 nanometers), smaller than the wavelength
of the light. Light behaves much differently on the nanoscale as its wavelength
is interrupted, producing unstable waves called evanescent waves. The ...
Fluorescent glass SRMs are new tool for spectroscopy
... In fluorescence spectroscopy, scientists send a beam of light at a certain wavelength
into a sample, exciting electrons in particular analytes or fluorescent ... the same conditions, even for fluorescence instruments with non-tunable wavelength
selectors, such as filter-based fluorometers and microscopes.
UCR scientists manipulate ripples in graphene, enabling strain-based graphene electronics
... ripples in graphene sheets. Using simple thermal manipulation, the researchers produced the ripples, and controlled their orientation, wavelength
"When the graphene sheets are stretched across a pair of parallel trenches, they spontaneously form nearly periodic ripples," Lau ...
Laser technology creates new forms of metal and enhances aircraft performance
... the size and shape of the nano-structures -- and thus what colors of light those structures absorb and radiate -- to change the amount of each wavelength
of light the filament radiates.
In addition to this research, Guo and his team have been working on creating technology that may enable the Air ...
Regular light bulbs made super-efficient with ultra-fast laser
... how to control the size and shape of the nanostructuresand thus what colors of light those structures absorb and radiateto change the amount of each wavelength
of light the tungsten filament radiates. Though Guo cannot yet make a simple bulb shine pure blue, for instance, he can change the overall radiated ...
Sandia researchers construct carbon nanotube device that can detect colors of the rainbow
... being light sensitive has been around for a long time, but earlier efforts using an individual nanotube were only able to detect light in narrow wavelength
ranges at laser intensities. The Sandia team found that their nanodetector was orders of magnitude more sensitive, down to about 40 W/m2about 3 ...
Catching the lightwave: Nano-mechanical sensors 'wired' by photonics
... electron spins and the smallest amounts of mass and movement, Yale researchers have demonstrated silicon-based nanocantilevers, smaller than the wavelength
of light, that operate on photonic principles eliminating the need for electric transducers and expensive laser setups.
The work reported in an ...
Scientists demonstrate laser with controlled polarization
... sculpted a metallic structure, dubbed a plasmonic polarizer directly on the facet of a quantum cascade (QC) laser. The QC laser emitted at a wavelength
of ten microns (in the invisible part of the spectrum known as the mid-infrared where the atmosphere is transparent). The team was able to control ...
Zinc oxide gives green shine to new photoconductors
... combination of attractive attributes: environmentally benign chemistry, low-cost production, a high level of detectivity, mechanical flexibility and wavelength
tunability (ability to design the material to absorb the most important part of the solar spectrum).
This impressive package of features holds ...
Engineers tune a nanoscale grating structure to trap and release a variety of light waves
... light waves at multiple locations on the surface and at different frequencies. Previous researchers, Gan says, had been able "to slow down one single wavelength
within a narrow bandwidth, but not many wavelengths over a wide spectrum."
Most of the initial work on this project has been theoretical, using ...
Plasmonic whispering gallery microcavity paves the way to future nanolasers
... gallery microcavity" based on plasmons - electromagnetic waves that race across the surfaces of metals. Such a plasmon wave has very small wavelength
compared with the light, enabling the scaling down optical devices beyond diffraction limit of the light. Cavities are the confined spaces in lasers ...
Duke researchers coax bright white light from unexpected source
... But Liu, Everitt and Foreman are investigating how nanostructuring and doping improves its performance.
The introduced sulfur is thought to boost wavelength
conversions from ultraviolet to visible wavelengths by serving as an "impurity" that changes the chemistry and physics of the zinc oxide in ways the ...
NIST 'stress tests' probe nanoscale strains in materials
... while the laser-generated photons used in CRM might penetrate as deep as a micrometer or more. The NIST researchers found that by varying the wavelength
of the Raman photons and positioning the focus of the microscope they could select the depth of the features measured by the Raman techniqueand when ...
Surface plasmon resonances of metal nanoparticles in array can have narrower spectral widths
... occur when the product of the nanoparticle spacing and the refractive index of the surrounding medium approximately matches the plasmon resonance wavelength
of a single nanoparticle," explained Crozier.
Over the past several years, Crozier and his colleagues have helped to advance the field of ...
Nanoscale dimensioning is fast, cheap with new NIST optical technique
Optical microscopes are not widely considered for checking nanoscale (below 100 nanometers) dimensions because of the limitation imposed by wavelength
of lightyou cant get a precise image with a probe three times the objects size. NIST researcher Ravikiran Attota gets around this, paradoxically, by ...
Denser, more powerful computer chips possible with plasmonic lenses that 'fly'
... oscillate when exposed to light. These oscillations, which absorb and generate light, are known as evanescent waves and are much smaller than the wavelength
The engineers designed a silver plasmonic lens with concentric rings that concentrate the light to a hole in the center where it exits ...
Case Western Reserve University researcher improves LCDs with 3-D nanoimaging process
In their ONT experiment the team immersed an optical fiber with a diameter of 60 nanometers (approximately one-tenth the diameter of the wavelength
of light) into the liquid crystal to a position just above the substrate. There the fiber was scanned two-dimensionally over the surface and an image ...
New research field promises radical advances in optical technologies
... hyperlens to conventional microscopes and see things 10 times smaller than now possible. You could focus down to the nanoscale, much smaller than the wavelength
of light, to actually see molecules like DNA, viruses and other objects that are now simply too small to see."
The hyperlens theoretically would ...
New nanoscale process created by UCSB scientists will help computers run faster and more efficiently
... called photolithography, which involves shining light onto the surface of a silicon wafer, and making patterns. He explained that the size of the wavelength
of light is becoming a limiting factor, and so his team has invented a new way of creating smaller patterns.
"We've come up with this new ...
NIST studies how new helium ion microscope measures up
... is in focus. It is the physics, explains Andras Vladar, SEM project leader in NISTs Nanoscale-Metrology Group. Ions have larger mass and shorter wavelength
than electrons, so they can be better for imaging. The images, he says, appear almost three-dimensional, revealing details smaller than a ...
Flexible nanoantenna arrays capture abundant solar energy
... nanoantenna pattern. The silicon-based nanoantennas matched the computer simulations, absorbing more than 80 percent of the energy over the intended wavelength
range. Next, they used a stamp-and-repeat process to emboss the nanoantennas on thin sheets of plastic. While the plastic prototype is still being ...
Scientists demonstrate highly directional semiconductor lasers
... consisting of an aperture and a periodic pattern of sub-wavelength grooves, directly on the facet of a quantum cascade laser emitting at a wavelength
of ten microns, in the invisible part of the spectrum known as the mid-infrared where the atmosphere is transparent. In so doing, the team was able ...
Using a grating with a grade, engineers trap a rainbow
... locations on the structure's surface and also at different frequencies.
"Previous researchers have reported the ability to slow down one single wavelength
at one narrow bandwidth," says Gan. "We've succeeded in actually stopping THz waves at different positions for different frequencies.
"Our next ...
Detecting dangerous chemicals with lasers, exploring the brain's circuitry with light and more
... by a tiny array of infrared quantum cascade lasers on a chip smaller than a dime. The chip holds an array of 32 lasers, each emitting a distinct wavelength
and together covering a broad spectral range in the infrared region. The researchers new paper demonstrates that their device could identify common ...
Silicon photonic crystals key to optical cloaking, researchers say
... of silicon photonic crystals. The width and spacing of the rings can be tailored for specific wavelengths of light.
"When light of the correct wavelength
strikes the coating, the light bends around the container and continues on its way, like water flowing around a rock," Xiao said. "An observer sees ...
New unifying theory of lasers advanced by physicists
... recent article in Science.
The lasers that most people are familiar with emit a narrow beam of light in a fixed direction that has a well-defined wavelength
and a predictable power output like those in laser pointers, bar-code readers, surgical instruments and CD players, said senior author A. Douglas ...
New technique measures ultrashort laser pulses at focus
... the research team began to use specialized fibers, called near-field scanning optical microscopy fibers, which can resolve features smaller than the wavelength
of the light.
The researchers tested the device by measuring ultrashort pulses focused by various lenses, since each lens can cause different ...
Cynosure Reports 41% Revenue Increase: 10th Consecutive Quarter of Revenue Growth
... (MultiPlex), the first FDA-cleared dual-wavelength system for laser lipolysis. The new workstation incorporates both a 1064-nm and a 1320-nm wavelength
to remove unwanted pockets of fat and tighten the surrounding tissue with optimal results. The company plans to introduce Smartlipo MPX in ...
'T-ray' breakthrough signals next generation of security sensors
The research shows that these T-rays, electromagnetic waves in the far
infrared part of the electromagnetic spectrum that have a wavelength
times longer than visible light, can be guided along the surface of a
specially designed material, known as a metamaterial. Being able to
Researchers create gold aluminum, black platinum, blue silver
... response incoming light in different ways depending on the way the laser pulse sculpted the structures. Since the structures are smaller than the wavelength
of light, the way they reflect light is highly dependent upon their specific size and shape, says Guo. Varying the laser intensity, pulse length, and ...
Tiny avalanche photodiode detects single UV photons
... single photons in the ultraviolet region (360-200 nm).
Previously, photomultiplier tubes (PMTs) were the only available technology in the short wavelength
UV portion of the spectrum capable of single photon detection sensitivity. However, these fragile vacuum tube devices are expensive and bulky, ...
Bookham to Enter Biomedical Illumination Market
... will be presenting three technical papers at
associated symposium LASE 2008: 'Recent developments for BAR and BASE:
setting the trends', 'Emission wavelength
stabilization in broad area
lasers coupled to fiber Bragg gratings' and 'Performance and reliability of
pulsed 1060 nm laser modules'.