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Photonics and LED Lighting News

Novel materials convert infrared light into visible light (Update)

Columbia University scientists, in collaboration with researchers from Harvard, have succeeded in developing a chemical process to visible light into infrared energy, allowing innocuous radiation to penetrate living tissue and other materials without the damage caused by high-intensity light exposure.

Posted on 16 January 2019 | 6:00 pm

Researchers establish principles for transmitting light-delivered data via nonreciprocal circuits

The development of fiber optics technology has been indispensable to increasing the speed at which information is delivered over large distances by relying on light to carry information rather than electricity. Currently, incoming light signals are converted into electrical signals, after which the information they carry is processed. Digital communications and sharing of information would be even faster and more energy efficient if light could be used throughout the entire process, but significant additional advances in integrated optical circuits and light-based computing are still required.

Posted on 16 January 2019 | 3:26 pm

Three-dimensional femtosecond laser nanolithography of crystals

Optical properties of materials are based on their chemistry and the inherent subwavelength architecture, although the latter remains to be characterized in depth. Photonic crystals and metamaterials have proven this by providing access through surface alterations to a new level of light manipulation beyond the known natural optical properties of materials. Yet, in the past three decades of research, technical methods have been unable to reliably nanostructure hard optical crystals beyond the material surface for in-depth optical characterization and related applications.

Posted on 15 January 2019 | 2:30 pm

Einstein–de Haas effect offers new insight into a puzzling magnetic phenomenon

More than 100 years ago, Albert Einstein and Wander Johannes de Haas discovered that when they used a magnetic field to flip the magnetic state of an iron bar dangling from a thread, the bar began to rotate.

Posted on 15 January 2019 | 2:14 pm

These Are The Best Vacuums To Invest In

A vacuum cleaner can make your life a lot easier, however it’s very important that you invest in the right cleaner because if you end up picking a model that’s not efficient you will spend more time trying to clean your home and this could make you feel frustrated. While back in the days vacuum […]

Posted on 15 January 2019 | 11:13 am

The New Age Social Media Platform

If you want to make sure you get the right exposure for your business then one of the best things to do is to use Facebook to promote your business. Once you use Facebook to promote your business you manage to get a good response from customers. In order for you to be able to […]

Posted on 15 January 2019 | 5:40 am

Scientists discover new ways to twist and shift light

The results from the National Physical Laboratory's (NPL) latest research in photonics could open doors to new quantum technologies and telecoms systems

Posted on 14 January 2019 | 12:23 pm

Next generation photonic memory devices are 'light-written,' ultrafast and energy efficient

Light is the most energy-efficient way of moving information. Yet, light shows one big limitation: it is difficult to store. As a matter of fact, data centers rely primarily on magnetic hard drives. However, in these hard drives, information is transferred at an energy cost that is nowadays exploding. Researchers of the Institute of Photonic Integration of the Eindhoven University of Technology (TU/e) have developed a 'hybrid technology' which shows the advantages of both light and magnetic hard drives.

Posted on 11 January 2019 | 3:06 pm

How To Wear Sexy Green Dress To A Party

When it comes to dressing, women are a lot more particular than men. From a shopping outfit to a party outfit of festive attire, yes, ladies are specific. And why not? Dressing right for an occasion is a smart choice. Not only in terms of attire but the colour you choose also plays an important […]

Posted on 10 January 2019 | 3:45 pm

Engineered light could improve health, food, suggests researcher

People who believe light-emitting diodes, or LEDS, are just an efficient upgrade to the ordinary electric light bulb are stuck in their thinking, suggest Sandia National Laboratories researcher Jeff Tsao and colleagues from other institutions in a Nature "Perspectives" article published in late November.

Posted on 10 January 2019 | 2:19 pm

A step closer to a data superhighway for future internet

An international team of researchers led by ANU is helping to build a safe data superhighway for the highly anticipated quantum internet, which promises a new era of artificial intelligence and ultra-secure communication.

Posted on 10 January 2019 | 2:04 pm

Optoacoustic microscopy at multiple discrete frequencies

Optoacoustic imaging powered by short bursts of continuous wave (CW) lasers can stimulate the emission of ultrasound waves inside an animal or in human subjects. The method can noninvasively capture blood flow and produce 3-D images of cellular microarchitecture. Writing in Light: Science & Applications, Stephan Kellnberger and colleagues at the Institute of Biological and Medical Imaging, now report the possibility of obtaining high-fidelity optoacoustic images with cost-effective lasers controlled at multiple frequencies.

Posted on 9 January 2019 | 2:40 pm

Artificial intelligence detects the presence of viruses

Many biosensing applications rely on characterization of specific analytes such as proteins, viruses and bacteria, among many other targets, which can be accomplished by using micro- or nano-scale particles. In such biosensors, these particles are coated with a surface chemistry that makes them stick to the target analyte forming clusters in response. The higher the target analyte concentration is, the larger the number of clusters gets. Therefore, monitoring and characterizing these particle clusters can tell us if the target analyte is present in a sample and in what concentration. Current methods to perform such an analysis are limited in that they are either capable of only a coarse readout or rely on expensive and bulky microscopes, which limit their applicability to address different biosensing needs, especially in resource limited environments.

Posted on 9 January 2019 | 2:17 pm

Scientists realize a three-dimensional 'topological' medium for electromagnetic waves

Topological insulators are exotic states of matter that physicists have been intensely studying for the past decade. Their most intriguing feature is that they can be rigorously distinguished from all other materials using a mathematical concept known as "topology." This mathematical property grants topological insulators the ability to transport electric signals without dissipation, via special quantum states called "topological surface states."

Posted on 9 January 2019 | 10:00 am

Researchers discover multilayer band gap using its own technology

Korean researchers at DGIST have proven the existence of the upper band gap of atomic rhenium disulfide (ReS2) layers in the conductive atomic structure of ionization energy. The work resulted from a joint study with Professor Jong-hyun Ahn's research team at Yonsei University.

Posted on 8 January 2019 | 12:40 pm

New way of switching exotic properties on and off in topological material

A weird feature of certain exotic materials allows electrons to travel from one surface of the material to another as if there were nothing in between. Now, researchers have shown that they can switch this feature on and off by toggling a material in and out of a stable topological state with pulses of light. The method could provide a new way of manipulating materials that could be used in future quantum computers and devices that carry electric current with no loss.

Posted on 8 January 2019 | 12:22 pm

The Most Efficient Rugs You Can Invest In

These days there are a number of being kinds of rugs options available when it comes to re decorating or renovating your home. However if you are planning on investing in rugs options that will not only be cost effective but will also enhance the overall look and feel of your home then one of […]

Posted on 6 January 2019 | 7:16 am

Enjoy Playing League of Legends Without Any Boundaries

League of Legends is one of the most popular games that you can download across multiple platforms today. Although this game is free to download, it comes with limited amount of coins, tools and diamonds and when you run out of these you find yourself stagnant in the game. If you would like to move […]

Posted on 6 January 2019 | 6:12 am

Is Lipo Laser Beneficial Or Not?

Thousands of surgeries are out there, and laser liposuction is one of them. It is really a great technique which is known as Smart Lipo. If you want to lose the belly fat instantly, then it would be a great option for you.  It is best ever treatment which is completely different from the traditional […]

Posted on 4 January 2019 | 2:45 pm

Excitons pave the way to higher-performance electronics

After developing a method to control exciton flows at room temperature, EPFL scientists have discovered new properties of these quasiparticles that can lead to more energy-efficient electronic devices.

Posted on 4 January 2019 | 1:17 pm

New nanosatellite system captures better imagery at lower cost

Ben-Gurion University researchers have developed a new satellite imaging system that could revolutionize the economics and imagery available from space-based cameras and even earth-based telescopes.

Posted on 4 January 2019 | 6:20 am

Make Your Home Beautiful

There are various reasons why using roller blinds can help your home become a more beautiful and lively space. While people lot of money enjoy using only the interiors of their home what they don’t realise is that they end up over flooding the house and they make it look extremely cramped up and tiny. […]

Posted on 3 January 2019 | 4:07 pm

Ultrathin digital camera inspired by Xenos peckii eyes

The visual system of Xenos peckii, an endoparasite of paper wasps, demonstrates distinct benefits for high sensitivity and high resolution, differing from the compound eyes of most insects. Inspired by their unique features, a KAIST team developed an ultrathin digital camera that emulates the unique eyes of Xenos peckii.

Posted on 2 January 2019 | 12:40 pm

Things To Talk About With A Girl On First Date

Introduction You are on a date with a girl that you really like and things are getting a little awkward. Your palms are starting to sweat, your heart is beating faster and your tongue is tied and twisted, but you do not want to ruin this date. So what will you do? Better get yourself […]

Posted on 29 December 2018 | 4:38 pm

How To Gro Your Social Media Influence?

Analytical studies have shown that the world of marketing will expand on a whole new scale by the year 2022 and this world will open the world to a whole new range of high paying opportunities which will test your day to day skills and social awareness like never before. The role of a social […]

Posted on 29 December 2018 | 3:26 pm

Secretes To Know While Selecting Plagiarism Checker

Are you the one who is looking for the best plagiarism checker? If yes then don’t worry, we are here to tell you some secrets which will help you to know that which one is the best checker for your text workings. There are many plagiarism tools you can find around you which are helpful […]

Posted on 29 December 2018 | 9:22 am

Fail-safe, reconfigurable chips

Researchers at the Telecommunications and Multimedia Applications Institute (iTEAM) of Valencia's Polytechnic University (UPV) have taken a step toward creating an infallible chip. They have developed an advanced method for the analysis and à la cart configuration of photonic circuits, which makes it possible to pre-emptively deal with the possible faults that a chip may suffer and reduce their impact in the design phase, before the chips become operational.

Posted on 28 December 2018 | 3:40 pm

Reactive optical matter: Light-induced motion

Newton's third law dictates that forces between interacting particles are equal and opposite for closed systems. In a non-equilibrium environment, the third law can be defied, giving rise to "nonreciprocal" forces. Theoretically, this was shown when dissimilar, optically trapped particles were mediated by an external field. In a recent study, Yuval Yifat and colleagues measured the net nonreciprocal forces in electrodynamically interacting, asymmetric nanoparticle dimers and nanoparticle aggregates. In the experiments, the nanoparticle structures were confined to pseudo one-dimensional geometries and illuminated by plane waves. The observed motion was due to the conservation of total momentum for particles and fields with broken mirror symmetry (represented by a changed direction of motion). The results are now published on Light: Science & Applications.

Posted on 28 December 2018 | 12:16 pm

What really happens at femtosecond junctions?

When beams of ultra-short laser pulses running in the same direction intersect with each other at a noticeable angle, various interactions occur between the pulses. These physical phenomena are complicated, and their mathematical description becomes computationally complex. To carry out the appropriate simulations, entire computer clusters have to be engaged. The latest version of Hussar software makes it possible to perform the calculations even on an ordinary laptop.

Posted on 27 December 2018 | 2:14 pm

New metasurfaces look bright in one direction, while dark in the opposite direction

Researchers at Aalto University have developed metasurfaces with extreme angle-asymmetric response. The surface reflections depend on the angle at which light hits it.

Posted on 21 December 2018 | 3:55 pm

Twisting light to enable high-capacity data transmission

For the first time, researchers have used tiny gears made of germanium to generate a vortex of twisted light that turns around its axis of travel much like a corkscrew. Because germanium is compatible with the silicon used to make computer chips, the new light source could be used to boost the amount of data that can be transmitted with chip-based optical computing and communication.

Posted on 21 December 2018 | 3:48 pm

Strong interactions produce a dance between light and sound

Light and high-frequency acoustic sound waves in a tiny glass structure can strongly couple to one another and perform a dance in step.

Posted on 21 December 2018 | 3:18 pm

Electronically programmable photonic molecule

Physical systems with discrete energy levels are ubiquitous in nature and form fundamental building blocks of quantum technology. Artificial atom-like and molecule-like systems were previously demonstrated to regulate light for coherent and dynamic control of the frequency, amplitude and the phase of photons. In a recent study, Mian Zhang and colleagues engineered a photonic molecule with two distinct energy levels, using coupled lithium niobate micro-ring resonators that could be controlled via external microwave excitation. The frequency and phase of light could be precisely operated by programmed microwave signals using canonical two-level systems to include Autler-Townes splitting, Stark shift, Rabi oscillation and Ramsey interference phenomena in the study. Through such coherent control, the scientists showed on-demand optical storage and retrieval by reconfiguring the photonic molecule into a bright-dark mode pair. The dynamic control of light in a programmable and scalable electro-optic system will open doors for applications in microwave-signal processing, quantum photonic gates in the frequency domain and to explore concepts in optical computing as well as in topological physics.

Posted on 21 December 2018 | 2:30 pm

One of the world's fastest cameras captures motion of electrons

During the conversion of light into electricity, such as in solar cells, a large part of the input light energy is lost. This is due to the behaviour of electrons inside of materials. If light hits a material, it stimulates electrons energetically for a fraction of a second, before they pass the energy back into the environment. Because of their extremely short duration of a few femtoseconds—a femtosecond is one quadrillionth of a second—these processes have hardly been explored to date. A team from the Institute of Experimental and Applied Physics at Kiel University (CAU), under the direction of Professor Michael Bauer and Professor Kai Roßnagel, has now succeeded in investigating the energy exchange of the electrons with their environment in real time, and thereby distinguishing individual phases. In their experiment, they irradiated graphite with an intense, ultrashort light pulse and filmed the impact on the behaviour of electrons. A comprehensive understanding of the fundamental processes involved could be important in future for applications in ultrafast optoelectronic components. The research team has published these findings in the current edition of the journal Physical Review Letters.

Posted on 21 December 2018 | 2:05 pm

New optical memory cell achieves record data-storage density

Researchers have demonstrated a new technique that can store more optical data in a smaller space than was previously possible on-chip. This technique improves upon the phase-change optical memory cell, which uses light to write and read data, and could offer a faster, more power-efficient form of memory for computers.

Posted on 20 December 2018 | 3:00 pm

Self-healing electroluminescent (EL) devices

In a recent study, materials scientists Guojin Liang and his coworkers at the Department of Materials Science and Engineering, City University of Hong Kong, have developed a self-healing, electroluminescent (EL) device that can repair or heal itself after damage. Inspired by the self-healing capacity of biological systems, the novel process paves the way for a range of new electronic applications. While EL devices are typically used in digital displays, backlights for control panels and wearable electronics, they are prone to damage. The fragility can restrict device working life, sustainability and reliability for long-term electronic applications.

Posted on 19 December 2018 | 2:40 pm

Focus on this: Team increases X-ray laser focusing ability

An X-ray free-electron laser (XFEL) is an X-ray produced by a beam of free electrons that have been accelerated almost to the speed of light. XFELs produce laser beams with exceedingly high peak power intensity, which makes them attractive for applications in fundamental research, such as X-ray nonlinear optics and protein crystal structure determination, and also in medicine. It is important to precisely focus XFEL beams to achieve high performance. Lasers are typically focused using total reflection mirrors; however, conventional mirrors are unsuitable for formation of sub-10 nm X-ray beams because such mirrors cannot deliver the large numerical aperture required. To overcome this limitation, X-ray beams can be focused using multilayer mirrors. Unfortunately, it is difficult to manufacture such multilayer mirrors because very high fabrication accuracy is required.

Posted on 19 December 2018 | 12:36 pm

New type of low-energy nanolaser that shines in all directions

Researchers in Eindhoven have developed a new type of low-energy, nanoscale laser that shines in all directions. The key to its omnidirectional light emission is the introduction of something that is usually highly undesirable in nanotechnology: irregularities in the materials. The researchers foresee a vast range of potential applications, but first they hope their fundamental work will inspire others to further improve it and deepen the understanding. The results are published in the journal Physical Review Letters.

Posted on 18 December 2018 | 2:04 pm

Holographic acoustic tweezers able to manipulate multiple objects in 3-D space

A pair of researchers, one with the Public University of Navarre, the other with the University of Bristol, has developed a system of holographic acoustic tweezers that can be used to manipulate multiple objects simultaneously in 3-D space. Asier Marzo and Bruce Drinkwater describe their tweezers and possible uses for them in their paper published in the Proceedings of the National Academy of Sciences.

Posted on 18 December 2018 | 1:30 pm

Sub-picosecond photon-efficient imaging using single-photon sensors

Single-photon avalanche diodes (SPADs) are promising detector technologies that may be used to achieve active 3D imaging systems with fast acquisition, high timing accuracy and high detection sensitivity. Such systems have broad applications in the domains of biological imaging, remote sensing and robotics. However, the detectors face technical impairments known as pileup that cause measurement distortions to limit their precision. In a recent study, conducted at the Stanford University Department of Electrical Engineering, scientists Felix Heide and co-workers developed a probabilistic image formation model that could accurately model pileup. Using the proposed model, the scientists devised inverse methods to efficiently and robustly estimate the scene depth and reflectance from recorded photon counts. With the algorithm, they were able to demonstrate improvements to the accuracy of timing, compared to existing techniques. More importantly, the model allowed accuracy at the sub-picosecond in photon-efficient 3D imaging for the first time in practical scenarios, whereas previously only widely-varying photon counts were observed. The results are now published in Scientific Reports.

Posted on 17 December 2018 | 2:30 pm