Photonics and LED Lighting News

Ultrafast electron oscillation and dephasing monitored by attosecond light source

Collaborative research team of Prof. Jun Takeda and Associate Prof. Ikufumi Katayama in the laboratory of Yokohama National University (YNU) and Nippon Telegraph and Telephone (NTT) have reported petahertz electron oscillation. The periodic electron oscillations of 667-383 attoseconds (10-18 of a second) is the fastest that has ever been measured in direct time-dependent spectroscopy in solid-state material.

Posted on 19 April 2018 | 11:26 am

From insulator to conductor in a flash

In recent decades, computers have become faster and hard disks and storage chips have reached enormous capacities. But this trend cannot continue forever. Physical limits are preventing silicon-based computer technology from attaining additional speed gains. Researchers are optimistic that the next era of technological advancements will start with the development of novel information-processing materials and technologies that combine electrical circuits with optical ones. Using short laser pulses, a research team led by Misha Ivanov of the Max Born Institute in Berlin, together with scientists from the Russian Quantum Center in Moscow, has shed light on the extremely rapid processes taking place within these novel materials. Their results appear in Nature Photonics.

Posted on 17 April 2018 | 10:36 am

When nuclei catch up with electrons

In an attosecond study of the H2 molecule, physicists at ETH Zurich found that for light atomic nuclei, as contained in most organic and biological molecules, the correlation between electronic and nuclear motions cannot be ignored.

Posted on 17 April 2018 | 9:28 am

Novel microscope concept can reduce radiation dose a thousand-fold

A concept for a novel X-ray microscope promises three-dimensional images of delicate objects like biological cells using a thousand times less damaging radiation than conventional methods. The novel microscope would allow to image whole cells at high resolution in their native environment, without freezing, cutting or staining them. DESY scientists Pablo Villanueva-Perez, Saša Bajt and Henry Chapman from the Center for Free-Electron laser Science (CFEL) present their concept in the journal Optica. The simulation study yields a bright perspective for the planned upgrade of DESY's storage ring PETRA III to a next generation X-ray source, PETRA IV.

Posted on 13 April 2018 | 1:24 pm

One string to rule them all

Strain can be used to engineer unusual properties at the nanoscale. Researchers in Tobias Kippenberg's lab at EPFL have harnessed this effect to engineer an extremely low-loss nanostring. When plucked, the string vibrates for minutes with a period of a microsecond (equivalent to a standard guitar note playing for a month). Using it as an ultrasensitive microphone, the researchers hope to be able to detect the sound of photons in a laser beam. The work is published in Science.

Posted on 13 April 2018 | 12:06 pm

Tiny probe can see and take body temperatures

University of Adelaide researchers have invented a world-first tiny fibre-optic probe that can simultaneously measure temperature and see deep inside the body.

Posted on 12 April 2018 | 11:04 am

Deep learning transforms smartphone microscopes into laboratory-grade devices

Researchers at the UCLA Samueli School of Engineering have demonstrated that deep learning, a powerful form of artificial intelligence, can discern and enhance microscopic details in photos taken by smartphones. The technique improves the resolution and color details of smartphone images so much that they approach the quality of images from laboratory-grade microscopes.

Posted on 11 April 2018 | 11:01 am

New light technique could result in less intrusive, more effective diagnosis for patients

A new method of using light to scan the human body, developed by researchers at the University of St Andrews, could result in less intrusive and more effective diagnosis for patients. The work is the result of a collaboration between researchers from the Schools of Physics and Astronomy, Biology, Medicine and the Scottish Oceans Institute at the University.

Posted on 10 April 2018 | 1:40 pm

Hard X-ray flash breaks speed record

Reactions in solar panels, catalytic converters, and other devices are governed by the quick motion of electrons. To capture the movement of these electrons, scientists use pulses of extremely high energy x-rays. The challenge is making the pulses short enough to get a good look at the electrons. Now, the shortest-ever pulses of hard x-rays were produced using two methods developed at SLAC's Linac Coherent Light Source. The pulse duration is just a few hundred attoseconds long, or billionths of a billionth of a second. It set a record for hard x-rays produced by free-electron lasers.

Posted on 10 April 2018 | 1:08 pm

Physicists explore a safe alternative to X-ray security scanners

A team of physicists at the University of Sussex are developing the science to create a safe and efficient 'paint' that can reveal, with terahertz (THz) radiation, the contents of luggage or objects hidden in clothing.

Posted on 10 April 2018 | 12:51 pm

Iridescent photonic cellulose, mimicking the structural color of insects, with optical applications

The bright colors of some butterflies, beetles or birds are not due to the presence of pigments that selectively absorb light, but due to the so-called structural coloration. Structural coloration occurs on surfaces with a nanostructure with dimensions similar to those of the wavelength of the incident light (typically below the micron). These ordered nanostructures are known as photonic crystals. There is a great interest in providing cellulose, the most abundant polymer in earth, biocompatible and biogradable, with these structures, which can offer new optical and electric functionalities.

Posted on 10 April 2018 | 11:26 am

Phononic SEIRA—enhancing light-molecule interactions via crystal lattice vibrations

A study published in Light: Science & Applications opens new avenues for fundamental studies of vibrational strong coupling, as well as for the development of novel infrared sensors for chemical recognition of very small amounts of molecules. The interaction of light and matter at the nanoscale is a key element for many fundamental studies and technological applications, ranging from light harvesting to the detection of small amounts of molecules.

Posted on 10 April 2018 | 10:11 am

Low bending loss waveguide opens the avenue to downsizing of 3-D photonic integrated circuits

Femtosecond laser direct writing is a promising technology for the fabrication of photonic integrated chips mainly due to its intrinsic capability of three-dimensional (3-D) prototyping in transparent substrates. Currently, the difficulty in inducing large refractive index changes smoothly distributed in the laser-irradiated regions is the major obstacle for producing compact photonic integrated circuits (PICs). Recently, researchers in China proposed a solution to suppress the bend loss of the waveguide at small radii of curvatures by more than one order of magnitude, opening a new avenue to downsizing of 3-D photonic integrated circuits. Their work, titled "Suppression of bend loss in writing of three-dimensional optical waveguides with femtosecond laser pulses," was published in Science China Physics, Mechanics & Astronomy.

Posted on 10 April 2018 | 9:57 am

New device modulates light and amplifies tiny signals

Imagine a single particle, only one-tenth the diameter of a bacterium, whose miniscule jiggles induce sustained vibrations in an entire mechanical device some 50 times larger. By taking clever advantage of the interplay between light, electrons on the surface of metals, and heat, researchers at the National Institute of Standards and Technology (NIST) have for the first time created a plasmomechanical oscillator (PMO), so named because it tightly couples plasmons—the collective oscillations of electrons at the surface of a metal nanoparticle—to the mechanical vibrations of the much larger device it's embedded in.

Posted on 9 April 2018 | 8:37 pm

Fluorescent dye could enable sharper biological imaging

Fluorescence imaging is widely used for visualizing biological tissues such as the back of the eye, where signs of macular degeneration can be detected. It is also commonly used to image blood vessels during reconstructive surgery, allowing surgeons to make sure the vessels are properly connected.

Posted on 9 April 2018 | 11:03 am

What are legal issues presents in the block chain technology?

A digital database that is containing wide range of data records and distributed on the area of network all over the world. This block chain technology has a powerful cryptography technique. This technique can protect data from human error, editing, and tempering. The recorded data of blockchain technology will save in blocks. The blocks are ...

Posted on 9 April 2018 | 10:15 am

Photonic communication comes to computer chips

With novel optoelectronic chips and a new partnership with a top silicon-chip manufacturer, MIT spinout Ayar Labs aims to increase speed and reduce energy consumption in computing, starting with data centers.

Posted on 6 April 2018 | 1:50 pm

Twisting laser light offers the chance to probe the nano-scale

A new method to sensitively measure the structure of molecules has been demonstrated by twisting laser light and aiming it at miniscule gold gratings to separate out wavelengths.

Posted on 5 April 2018 | 2:43 pm

New camera inspired by butterfly eyes improves image-guided cancer surgery

By mimicking the intricate visual system of a butterfly, researchers have created a camera that provides surgeons with both a traditional color image as well as a near-infrared image that makes fluorescently labeled cancerous cells visible even under bright surgical lighting. The new camera is designed to help surgeons remove all the cancerous cells without damaging healthy tissue, making it less likely that the cancer will spread and reducing the need for multiple surgeries.

Posted on 5 April 2018 | 2:00 pm

Scientists create 'Swiss army knife' for electron beams

DESY scientists have created a miniature particle accelerator for electrons that can perform four different functions at the push of a button. The experimental device is driven by a terahertz radiation source and can accelerate, compress, focus and analyse electron bunches in a beam. Its active structures measure just a few millimetres across. The developers from the Center for Free-Electron Laser Science (CFEL) present their segmented terahertz electron accelerator and manipulator (STEAM) in the journal Nature Photonics. terahertz radiation is located between microwaves and the infrared in the electromagnetic spectrum.

Posted on 4 April 2018 | 10:28 am

A new metasurface model shows potential to control acoustic wave reflection

An international team of researchers showed how a nonlinear elastic metasurface could convert a wave's fundamental frequency to its second harmonic. Structural factors in metasurfaces, like the spatial arrangement of its molecules and its composition, underpin its optical, elastic and acoustic properties. Developing this metasurface could help architects reduce noise from performance halls to cityscapes. These findings could also enhance cloaking technology for submarines to evade sonar detection.

Posted on 3 April 2018 | 4:14 pm

Researchers develop nanoparticle films for high-density data storage

As we generate more and more data, the need for high-density data storage that remains stable over time is becoming critical. New nanoparticle-based films that are more than 80 times thinner than a human hair may help to fill this need by providing materials that can holographically archive more than 1000 times more data than a DVD in a 10-by-10-centimeter piece of film. The new technology could one day enable tiny wearable devices that capture and store 3-D images of objects or people.

Posted on 3 April 2018 | 4:05 pm

Make Money The Easy Way

If you told people a few years ago that cryptocurrency would become one of the most popular currency forms cross the world and people would be using it for various purposes then nobody would have believed you however the truth is cryptocurrency like Clear Coin have gained a lot of popularity and people all across ...

Posted on 2 April 2018 | 9:58 am

Scientists successfully print glass optics

For the first time, researchers at Lawrence Livermore National Laboratory (LLNL) have successfully 3-D-printed optical-quality glasses, on par with commercial glass products currently available on the market.

Posted on 30 March 2018 | 11:52 am

Scientist modifies digital cinema technology for future space missions

Rochester Institute of Technology researchers are developing and testing an astronomical imager inspired by an Oscar-award winning cinema projection system.

Posted on 29 March 2018 | 8:23 pm

Femtosecond laser fabrication—realizing dynamics control of electrons

Femtosecond lasers are capable of processing any solid material with high quality and high precision using their ultrafast and ultra-intense characteristics. With the continuous development of laser technology, ultrafast laser manufacturing could become one of the primary methods employed in high-end manufacturing in the future.

Posted on 28 March 2018 | 9:45 am

New method speeds up 3-D printing of millimeter-sized imaging lenses

A new method to make a low-cost, high-quality lens quickly using a 3D printer has promising potential to create optical imaging lenses, customized contact lenses for correcting distorted vision, or to even turn iPhones into microscopes for disease diagnosis.

Posted on 27 March 2018 | 1:12 pm

Reversal of orbital angular momentum arising from an extreme Doppler shift

Scientists have demonstrated for the first time how 'twisted' sound waves from a rotating source can produce negative frequencies—akin to turning back time.

Posted on 27 March 2018 | 12:58 pm

New laser technique may help detect chemical warfare in atmosphere

The Department of Homeland Security could benefit from a reliable, real-time instrument that could scan the atmosphere for toxic agents in order to alert communities to a biological or chemical attack. UCF optics and photonics Professor Konstantin Vodopyanov is developing just such a technology to accomplish that.

Posted on 26 March 2018 | 4:21 pm

Particle detectors meet canvas

Artworks are part of our cultural and historical heritage. Yet, according to the Fine Arts Expert Institute, nearly half of the artworks circulating on the market are fakes. So how can you tell if a Rembrandt painting is really a Rembrandt and if a Monet is really a Monet? Moreover, how do you make sure a painting of great value is kept in perfect condition for many generations to come? Museums, art galleries, auction houses, art restorers and other art experts may now benefit from the use of particle detectors for art authentication and restoration.

Posted on 26 March 2018 | 2:40 pm

Ultrathin endoscope captures neurons firing deep in the brain

Researchers have developed an endoscope as thin as a human hair that can image the activity of neurons in the brains of living mice. Because it is so thin, the endoscope can reach deep into the brain, giving researchers access to areas that cannot be seen with microscopes or other types of endoscopes.

Posted on 26 March 2018 | 2:38 pm

Synchronized fluctuation-type art illumination

An industry-university collaboration joint research team led by Osaka University developed synchronized fluctuation-type art illumination, in which the natural rhythm (tremor) of candle light can be produced even in artificial light by using technology to synchronize fluctuations in light with rhythms in nature.

Posted on 26 March 2018 | 12:56 pm

Enhance Your Skills With These Ramps

If you love to skateboard and you enjoy the activity then you need to understand that it’s important for you to stay responsible which is why you should consider investing in a skateboard ramp. Although some people choose not to invest in a skateboard ramp because they believe it’s expensive they need to understand that ...

Posted on 24 March 2018 | 6:11 am

Use This Hack To Become The Best

Ever since smartphones have come into play more and more people are getting used to the idea of Mobile gaming and there are so many games that you can download that you will never get bored. Recently traffic Rider has gained a lot of popularity not only because it is a lot of fun to ...

Posted on 24 March 2018 | 5:39 am

Even More Great Umbrellas for the Beach

The summer season is fast approaching, and people are finding ways in order for them to beat the heat of the sun, while enjoying the great outdoors. This is often the case when you go to the beach, where it’s often extra sunny yet windy at the same time. With that said, the perfect thing ...

Posted on 20 March 2018 | 6:40 am

Things you need to know about Lightning Bolt Cleaning Services

To those who are looking for carpet cleaning in Irvine services that you can trust, one of these is Lightning Bolt Carpet and Upholstery Cleaning is the perfect one for you. This is because they make it a point to be thorough and more detail-oriented, while using techniques that are not just efficient, but are ...

Posted on 19 March 2018 | 3:08 pm

Prevent Your Business From Going Bankrupt

Anyone can need money at any moment in life. Most of the time we are prepared but sometimes, it’s really a critical phase in regards to money. It could be due to any reason, maybe your payment is due, or the money you were depended on is late, or your salary check is late. There ...

Posted on 18 March 2018 | 7:12 pm

Now You Can Make The Most Of This Technology

There are a number of people who believe that cryptocurrency is unsafe and it is a very complicated form of currency that they can’t really use. The truth, however, is cryptocurrency is just as simple as internet banking and it is a lot safer. Firstly you don’t have to worry about converting your cryptocurrency into ...

Posted on 18 March 2018 | 5:12 am

Get Money When It Is Most Needed

It is true, apart from providing you the financial help, payday loans can help you in much more ways. The first and foremost ones are, they can be utilized in an emergency, like medical treatments, renovations, school/college fees, getting something better and much more. It is also utilized to pay your bills, like credit card ...

Posted on 17 March 2018 | 7:02 pm

A look at the Best Adjustable Dumbbells for 2018

There are a lot of things that you have to put into consideration when it comes to choosing the best adjustable dumbbells you will use for your home gym. With that said, this article will help you to pick the best out of the many brands available today. All of these dumbbells come with a ...

Posted on 16 March 2018 | 10:29 am