(Phys.org)—Researchers have designed an optical lens that exhibits two properties that so far have not been demonstrated together: self-focusing and an optical effect called the Talbot effect that creates repeating patterns of light. The researchers showed that the combination of these two properties can be used to transfer an encoded digital signal without information loss, which has potential applications for realizing highly efficient optical communication systems.
Posted on 28 July 2017 | 1:30 pm
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Posted on 27 July 2017 | 1:20 pm
The inner workings of the human brain have always been a subject of great interest. Unfortunately, it is fairly difficult to view brain structures or intricate tissues due to the fact that the skull is not transparent by design. The reality is that light scattering is the major obstacle for deep penetration into tissue.
Posted on 27 July 2017 | 11:16 am
Physicists from the ARC Centre of Excellence for Ultrahigh bandwidth Devices for Optical Systems (CUDOS) developed a new hybrid integrated platform, promising to be a more advanced alternative to conventional integrated circuits. The researchers demonstrated their approach is mass manufacturable, making it possible to integrate the platform into everyday electronic equipment like smartphones. For end users this technical advance means it may lead to faster internet on their next-generation electronic devices.
Posted on 26 July 2017 | 2:05 pm
High-speed optical circuits and sensors generally require strict control over light polarization to minimize loss and cross-talk in photonic devices such as waveguides. An A*STAR team now predicts that noise resulting from imperfect polarizations can be eliminated using microstructures known as 'slot' waveguides.
Posted on 26 July 2017 | 11:13 am
While the charge and spin properties of electrons are widely utilized in modern day technologies such as transistors and memories, another aspect of the subatomic particle has long remained uncharted. This is the "valley" property which has potential for realizing a new class of technology termed "valleytronics" - similar to electronics (charge) and spintronics (spin). This property arises from the fact that the electrons in the crystal occupy different positions that are quantum mechanically distinct.
Posted on 25 July 2017 | 6:24 pm
Many of today's cars are coated with paint that exhibits a metallic or glittery shine. The exact sparkle and color you see is determined by the distribution and characteristics of tiny metal flakes used in the paint. A new approach based on the medical imaging technique optical coherence tomography (OCT) provides the car industry with a practical way to automatically analyze these metal flakes, which until now have been difficult to image, in order to improve the efficiency of the automotive finishing process.
Posted on 25 July 2017 | 2:53 pm
An antenna is a device capable of effectively transmitting, picking up, and redirecting electromagnetic radiation. Typically, antennas are macroscopic devices operating in the radio and microwave range. However, there are similar optical devices (Fig. 1). The wavelengths of visible light amount to several hundred nanometers. As a consequence, optical antennas are, by necessity, nanosized devices. Optical nanoantennas, which can focus, direct, and effectively transmit light, have a wide range of applications, including information transmission over optical channels, photodetection, microscopy, biomedical technology, and even speeding up chemical reactions.
Posted on 24 July 2017 | 2:20 pm
Researchers at IMS and their coworkers have shown theoretically and experimentally that a high energy electron in circular/spiral motion radiates vortex photons from the radio wavelength to gamma rays. This greatly broadens application spectra of the vortex photons in the field of physical science. Moreover, the finding indicates that vortex photons are ubiquitous in the universe. It paves the way to a completely new research field: natural vortex photon science.
Posted on 21 July 2017 | 10:17 am
Brown University researchers have developed a new method of manipulating the polarization of light at terahertz frequencies.
Posted on 19 July 2017 | 3:28 pm
Attosecond science has revolutionized the way we look into the time-dependent evolution of the microscopic world, where the behaviour of matter is governed by the rules of quantum mechanics. The technological breakthrough that made possible the development of the field is based on the generation of ultra-short laser pulses that last only a few oscillations of the electric field. These short pulses have a focused intensity where the electric field is comparable to the one electrons experience inside atoms and molecules. It is possible to control both the exact temporal shape and the waveform of these ultra-short pulses. While ultra-short laser pulses have been used in a few laboratories worldwide to study light-induced dynamics in atoms and molecules, many questions remain unanswered, due to the low data rates and inherently low SNR achievable with current state-of-the-art laser systems.
Posted on 19 July 2017 | 1:11 pm
Technology developed by a team of University of Utah electrical and computer engineers could make the holographic chess game R2-D2 and Chewbacca played in "Star Wars" a reality.
Posted on 19 July 2017 | 9:50 am
Scientists from the Moscow Institute of Physics and Technology (MIPT) and international collaborators have developed a new type of optical fiber that has an extremely large core diameter and preserves the coherent properties of light. The paper was published in the journal Optics Express. The results of the study are promising for constructing high-power pulsed fiber lasers and amplifiers, as well as polarization-sensitive sensors.
Posted on 18 July 2017 | 9:35 am
It's hard to get an X-ray image of low-density material like tissue between bones because X-rays just pass right through like sunlight through a window. But what if you need to see the area that isn't bone?
Posted on 17 July 2017 | 6:25 pm
A team of engineers at Caltech has discovered how to use computer-chip manufacturing technologies to create the kind of reflective materials that make safety vests, running shoes, and road signs appear shiny in the dark.
Posted on 14 July 2017 | 1:28 pm
Researchers have developed a fast and practical molecular-scale imaging technique that could let scientists view never-before-seen dynamics of biological processes involved in neurodegenerative diseases such as Alzheimer's disease and multiple sclerosis.
Posted on 13 July 2017 | 2:00 pm
Physicists at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) and Friedrich Schiller University Jena (FSU) have accomplished a quantum leap in light research. They have managed to capture the behaviour of extremely short laser pulses during focusing by means of very high spatial and temporal resolution. The results are of fundamental relevance to understanding the interactions between light and matter and will make it possible to control electron movements and chemical reactions to an extent that was previously not feasible. These insights into fundamental physics will particularly profit further research into new radiation sources and in the field of light wave electronics. The researchers recently published their findings in the leading specialist journal Nature Physics.
Posted on 12 July 2017 | 3:23 pm
A scientist's dream of 3-D projections like those he saw years ago in a Star Wars movie has led to new technology for making animated 3-D table-top objects by structuring light.
Posted on 11 July 2017 | 3:19 pm
Scientists from the Lomonosov Moscow State University, together with their Russian and foreign colleagues, have achieved the first direct measurements of giant electromagnetic fields emerging in dielectric particles with high refractive index at the scattering of electromagnetic waves. The researchers have presented their project results in Scientific Reports.
Posted on 10 July 2017 | 10:02 am
Photonic crystal fibres (PCF) are strands of glass, not much thicker than a human hair, with a lattice of hollow channels running along the fibre. If they are continuously twisted in their production, they resemble a multi-helix. Twisted PCFs show some amazing features, from circular birefringence to conservation of the angular momentum. The biggest surprise, however, is the robust light guidance itself, with no visible fibre core. The basis for this are forces which, like gravitation, are based on the curvature of space.
Posted on 7 July 2017 | 12:06 pm
Working in collaboration with the Lionix company, researchers from the University of Twente's MESA+ research institute have developed the world's most narrowband diode laser on a chip. This laser represents a breakthrough in the fast-growing field of photonics, and will bring applications like 5G internet and accurate GPS closer. Research leader Professor Klaus Boller presented the research results during a prestigious scientific conference in Munich.
Posted on 3 July 2017 | 1:55 pm
In a recent publication, Aalto University researchers show that in a transparent medium each photon is accompanied by an atomic mass density wave. The optical force of the photon sets the medium atoms in motion and makes them carry 92% of the total momentum of light, in the case of silicon.
Posted on 30 June 2017 | 12:36 pm
No one had ever come so close to the ideal laser before: theoretically, laser light has only one single color (also frequency or wavelength). In reality, however, there is always a certain linewidth. With a linewidth of only 10 mHz, the laser that the researchers from the Physikalisch-Technische Bundesanstalt (PTB) have now developed together with US researchers from JILA, has established a new world record. This precision is useful for various applications such as optical atomic clocks, precision spectroscopy, radioastronomy and for testing the theory of relativity. The results have been published in the current issue of Physical Review Letters.
Posted on 29 June 2017 | 2:24 pm
New research has made it possible for the first time to compare the spatial structures and positions of two distant objects, which may be very far away from each other, just by using a simple thermal light source, much like a star in the sky.
Posted on 29 June 2017 | 11:50 am
Shortly after lasers were first developed in the 1960s, LiDAR—whose name originated as a combination of "light" and "radar"—capitalized on the newly unique precision they offered for measuring both time and distance. LiDAR quickly became the standard method for (3-D) land surveys and is now used in a multitude of sensing applications, such as self-driving cars.
Posted on 27 June 2017 | 5:57 pm
A diagnostic technique that can detect tiny molecules signalling the presence of cancer could be on the horizon.
Posted on 27 June 2017 | 10:04 am
High performance motion detection technology is critical as the 'eyes' of advanced robotic systems for applications including factory management and autonomous machines in home environments. Traditional robot vision devices such as CCD cameras integrated with microelectronic circuits rely on sophisticated algorithms for high speed imaging and processing for robotic navigation. However, these systems are expensive to implement and require specialists for maintenance when equipment malfunctions.
Posted on 27 June 2017 | 9:59 am
Modulating the amplitude and phase of light is a key ingredient for many of applications such as wavefront shaping, transformation optics, phased arrays, modulators and sensors. Performing this task with high efficiency and small footprint is a major challenge for the development of optoelectronic devices.
Posted on 27 June 2017 | 9:31 am
Physicists from the University of Nebraska-Lincoln are seeing an everyday phenomenon in a new light.
Posted on 26 June 2017 | 3:00 pm
An artificial iris manufactured from intelligent, light-controlled polymer material can react to incoming light in the same ways as the human eye. The iris was developed by the Smart Photonic Materials research group from the TUT, and it was recently published in the Advanced Materials journal.
Posted on 26 June 2017 | 9:45 am
LED screens are now very common as business carrier in cities. And the LED display in Mall Taman Anggrek Jakarta, Indonesia is the largest in the world by now. [Read more...]
Posted on 13 May 2015 | 10:09 am
Sanan Optoelectronics Co., Ltd disclosured its first quarter report in 21th evening April, that the company achieved revenues of 927 million yuan (about US$ 149.58 million dollar), an increase of 12.65% as the same period of last year's 823 million yuan (about US$ 132.80 million dollar). [Read more...]
Posted on 22 April 2015 | 3:36 am
American Lighting manufacturers Global Lighting Technologies (GLT) has developed ultra-thin LED panel light which adopts light guiding panel. The size of the lighting panel is 4 inches (about 10cm), thickness is 3.5mm, and the luminous efficiency is 115lm/W,which is in high level among the light guiding panel. [Read more...]
Posted on 18 April 2015 | 9:38 am
In Warsaw Poland, to enhance people's awareness of environmental protection, Luzinterruptus held a 12-hour charity called Recycling Sunday by using plastic bags, the activity brought thousands of luminous plastic bags which scattered in the square. [Read more...]
Posted on 17 April 2015 | 7:14 am
Samsung Display split the LCD panel and OLED business into two divisions again, it seems that Samsung want to assign professionals for the two departments, and boost marketing capabilities, the market rumors that Samsung intends to rebuild its OLED TV business. [Read more...]
Posted on 6 April 2015 | 10:00 am
Recently, Philips revealed its intelligent lighting "Hue" series will add a new member - "Hue Go". This new product with bowl shapes, but it not only a bowl, same with the previous Hue series, it can be connected to the phone associated with the APP. [Read more...]
Posted on 5 April 2015 | 8:07 am
Philips officially announced on 31st March that 80.1% of the Lumileds shares have been acquired by GO Scale Capital, Philips will retain the remaining 19.9% stake. GO Scale Capital is a new investment fund sponsored by GSR Ventures and Oak Investment Partners. The consortium partners are Asia Pacific Resource Development, Nanchang Industrial Group and GSR Capital. [Read more...]
Posted on 2 April 2015 | 8:19 am
The United States, Canada and Australia always provide comfortable environment for Children's Hospitals, and the Oklahoma hospital installed a kite LED lamps to provide cozy lighting for little patient. [Read more...]
Posted on 27 March 2015 | 10:26 am
Recently, Samsung intends to merge LED production lines "Line 3" and "SR line" together to "Line 5" which is located in Gyeonggi-do. Line 5 was originally responsible for production of Samsung's semiconductor products, but the company decides to convert it to LED chip production line, it mainly produces 4-inch and 8-inch products. [Read more...]
Posted on 18 March 2015 | 9:21 am
P Narayana, the Minister of Municipal Administration Department said at the LED manufacturing National Conference that "Chief Minister N Chandrababu Naidu set a goal to install energy-efficient LED lighting systems in 110 streets and private companies at the end of June." [Read more...]
Posted on 13 March 2015 | 3:56 am