Current Photons News and Events

Current Photons News and Events, Photons News Articles.
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Metamaterial tiles boost sensitivity of large telescopes
A multi-institutional group of researchers has developed new metamaterial tiles that will help improve the sensitivity of telescopes being built at the preeminent Simons Observatory in Chile. (2021-01-26)

Optimal information about the invisible
Laser beams can be used to precisely measure an object's position or velocity. Normally, a clear, unobstructed view of this object is required. Irregular environments scatter the light beam - but as it turns out, precisely this effect can be used to obtain optimum information in difficult situations. (2021-01-25)

White turns into (extreme-)ultraviolet
Researchers from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) have developed a new method to modify the spectral width of extreme-ultraviolet (XUV) light. By employing a novel phase-matching scheme in four-wave mixing, they could compress the spectral width of the initial broadband light by more than hundred times. The detailed experimental and theoretical results have been published in Nature Photonics. (2021-01-25)

Search for axions from nearby star Betelgeuse comes up empty
An MIT-led search for axions from nearby star Betelgeuse has come up empty, significantly narrowing the search for hypothetical dark matter particle. (2021-01-21)

Study: X-Rays surrounding 'Magnificent 7' may be traces of sought-after particle
A new study, led by a theoretical physicist at Berkeley Lab, suggests that never-before-observed particles called axions may be the source of unexplained, high-energy X-ray emissions surrounding a group of neutron stars. (2021-01-15)

Pivotal discovery in quantum and classical information processing
Researchers have achieved, for the first time, electronically adjustable interactions between microwaves and a phenomenon in certain magnetic materials called spin waves. This could have application in quantum and classical information processing. (2021-01-13)

Using light to revolutionize artificial intelligence
An international team of researchers, including Professor Roberto Morandotti of the Institut national de la recherche scientifique (INRS), just introduced a new photonic processor that could revolutionize artificial intelligence, as reported by the prestigious journal Nature. (2021-01-11)

High-flux table-top source for femtosecond hard X-ray pulses
Researchers at the Max Born Institute (MBI) in Berlin have now accomplished a breakthrough in table-top generation of femtosecond X-ray pulses by demonstrating a stable pulse train at kilohertz repetition rate with a total flux of some 10^12 X-ray photons per second. (2021-01-07)

Experiment takes 'snapshots' of light, stops light, uses light to change properties of matter
The team generated a movie of how light waves churn on their nanometer wavelength scale by imaging electrons that two light photons coming together cause to emit from the surface. (2020-12-23)

Experiments first verify distributed quantum phase estimation
Professor PAN Jianwei and his colleges from University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) have achieved the experimental verification of distribution quantum phase estimation for the first time. This work was published on Nature Photonics. (2020-12-21)

Stevens creates entangled photons 100 times more efficiently than previously possible
Super-fast quantum computers and communication devices could revolutionize countless aspects of our lives -- but first, researchers need a fast, efficient source of the entangled pairs of photons such systems use to transmit and manipulate information. Researchers at Stevens Institute of Technology have done just that, not only creating a chip-based photon source 100 times more efficient that previously possible, but bringing massive quantum device integration within reach. (2020-12-17)

Polariton interactions: Light matters
Why do 2D exciton-polaritons interact? This intriguing quasiparticle, which is part light (photon), and part matter (exciton), doesn't behave as predicted: continuing to interact with other particles when confined to two dimensions in extremely cold conditions. A new FLEET/Monash study finds the answer lies in the 'light-like' characteristics of these quasiparticles, with importance for future applications such as ultra-low energy electronics. (2020-12-16)

Quantum interference in time
Bosons--especially photons--have a natural tendency to clump together. In 1987, three physicists conducted a remarkable experiment demonstrating this clustering property, known as the Hong-Ou- Mandel effect. Recently, researchers at ULB's Centre for Quantum Information and Communication, have identified another way in which photons manifest their propensity to stick together. This research has just been published in PNAS (2020-12-14)

Physics discovery leads to ballistic optical materials
A team led by a Purdue University scientist has found a way to create more efficient metamaterials using semiconductors and a novel aspect of physics that amplifies the activity of electrons. (2020-12-14)

International research project investigates photosensitive carbon nanoparticles
An international team of researchers, including researchers from FAU headed by Prof. Dr. Dirk M. Guldi have now managed to identify the fundamental problems relating to the photophysics and photochemistry of carbon nanocolloids (CNC), and ascertain possible approaches for research into these readily available, non-toxic and adaptable nanomaterials. (2020-12-14)

Researchers demonstrate nondestructive mid-infrared imaging using entangled photons
Researchers have shown that entangled photons can be used to improve the penetration depth of optical coherence tomography (OCT) in highly scattering materials. The method represents a way to perform OCT with mid-infrared wavelengths and could be useful for non-destructive testing and analysis of materials such as ceramics and paint samples. (2020-12-10)

Within a hair's breadth--forensic identification of single dyed hair strand now possible
A single strand of hair in a crime scene contains many clues that can help identify a perpetrator. In a recent study, scientists at Tokyo University of Science, Japan, have combined two modern techniques, called surface-enhanced Raman spectroscopy and X-ray fluorescence, to distinguish between different colors in individual hair strands. Both these techniques are almost non-destructive and can be conducted with portable devices, making this a promising way to get supportive evidence in forensic investigations. (2020-12-09)

Research brief: Researchers develop unique process for producing light-matter mixture
In groundbreaking new research, an international team of researchers led by the University of Minnesota Twin Cities has developed a unique process for producing a quantum state that is part light and part matter. (2020-12-07)

RUDN University chemists synthesized new fluorescent substances for medical applications
Indolizines are a group of substances with biological and optical properties. A team of chemists from RUDN University developed a new approach to the synthesis of indolizines using pyridinium salts and enamiones. The new substances turned out to be able to emit light in the green range which can be useful for medical applications. (2020-12-04)

Dark excitons hit the spotlight
Heralding the end of a decade-long quest, in a promising new class of extremely thin, two-dimensional semiconductors, scientists in Japan have for the first time directly visualized and measured elusive particles, called dark excitons, that cannot be seen by light. The powerful technique, described in Science, could revolutionize research into two-dimensional semiconductors and excitons, with profound implications for future technological devices, from solar cells and LEDs to smartphones and lasers. (2020-12-03)

Scientists invent a new type of microscope that can see through an intact skull
Researchers at IBS invented a new type of microscope called reflective matrix microscope, which uses adaptive optics techniques (2020-12-02)

A French team has improved the measurement of a fundamental physical constant
A team of French researchers has just conducted the most accurate measurement to date of the fine-structure constant, which characterizes the strength of interaction between light and charged elementary particles, such as electrons. This value has just been determined with an accuracy of 11 significant digits; improving the precision of the previous measurement by a factor of 3. (2020-12-02)

Controlling fully integrated nanodiamonds
Physicists at Münster University have succeeded in fully integrating nanodiamonds into nanophotonic circuits and at the same time addressing several of these nanodiamonds optically. The study creates the basis for future applications in the field of quantum sensing schemes or quantum information processors. The results have been published in the journal Nano Letters. (2020-11-23)

Analysis paves way for more sensitive quantum sensors
Theoretical researchers at Pritzker Molecular Engineering have found a way to make quantum sensors exponentially more sensitive by harnessing a unique physics phenomenon. (2020-11-16)

History of temperature changes in the Universe revealed
How hot is the Universe today? How hot was it before? A new study by an international team of researchers, including members of the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), suggests that the mean temperature of gas in large structures of the Universe has increased about 3 times in the last 8 billion years, to reach about two million Kelvin today. (2020-11-13)

Research produces intense light beams with quantum correlations
Potential applications of research conducted at the University of São Paulo include high-precision metrology and information encoding. (2020-11-12)

Cascade amplified upconversion luminescence facilitating narrow band NIR photodetection
Facing the fact that selective detection of multiple narrow spectral bands in the near-infrared (NIR) region still poses a fundamental challenge. Towards this goal, Hongwei Song's group and Liu developed selectively multispectral narrow-band near-infrared photodetection using photon upconversion nanocrystals (UCNCs) through a cascade optical field modulation strategy. They demonstrated for the first time that the response to the excitation modulation frequency of a PD can be employed to discriminate the incident light wavelength. (2020-11-11)

Invisible organic light-emitting diodes reach new world record
You can't see it with the naked eye, but a new fluorescent organic light-emitting diode (OLED) could shed light on the development of innovative applications in devices such as smartphone and television displays using near-infrared light. Created through the combined work of engineers from Polytechnique Montréal and chemists from Université de Montréal, this fluorescent OLED is 300% more efficient than existing OLEDs in its category. The research team published today details in the journal Advanced Functional Materials. (2020-11-11)

New technology allows cameras to capture colors invisible to the human eye
New research from Tel Aviv University will allow cameras to recognize colors that the human eye and even ordinary cameras are unable to perceive. The technology makes it possible to image gases and substances such as hydrogen, carbon and sodium, each of which has a unique color in the infrared spectrum, as well as biological compounds that are found in nature but are 'invisible' to the naked eye or ordinary cameras. (2020-11-05)

Building a quantum network one node at a time
University of Rochester and Cornell University researchers create 'optically active spin arrays' within a device that could serve as a node for exchanging photons with distant locations. (2020-11-04)

Devil in the defect detail of quantum emissions unravelled
Emerging quantum technologies require a means to transmit quantum information effectively requiring new ways to reliably encode, transmit and detect quantum properties on individual particles of light, or photons. An international collaboration, led by the University of Technology Sydney, investigating the chemical structure of crystal imperfections, or defects, in the nanomaterial hexagonal boron nitride (hBN) have definitively linked the defect structure to carbon impurities introduced into the hBN lattice. The discovery enables a better understanding of the properties of these quantum light sources. (2020-11-02)

Infrared light antenna powers molecular motor
Light-controlled molecular motors can be used to create functional materials, to provide autonomous motion or in systems that can respond on command, for example, to open drug-containing vesicles. For biological applications, this requires the motors to be driven by low-energy, low-intensity light that penetrates tissue. Chemists at the University of Groningen designed a rotary motor that is efficiently powered by near-infrared light, through adding an antenna to the motor molecule. (2020-10-28)

Not all cats are grey in the dark!
Using two mode-locked femtosecond lasers and a single photon counting detector, scientists have recorded broad spectra with close to one hundred thousand colors in almost complete darkness. (2020-10-23)

When Fock meets Landau: Topology in atom-photon interactions
Topological photonics concerns the classical wave simulation of electronic band topology. Does the quantum nature of light embed new topological states? By exploiting the similarity between the Jaynes-Cummings model and graphene, topological states of quantized light were found with a wealth of physics involving the valley Hall effect, the Haldane model and the Lifshitz topological transition. This research built a bridge between quantum electrodynamics and topological phases in condensed matter physics. (2020-10-14)

Penn engineers create helical topological exciton-polaritons
Researchers at the University of Pennsylvania's School of Engineering and Applied Science are the first to create an even more exotic form of the exciton-polariton, one which has a defined quantum spin that is locked to its direction of motion. Depending on the direction of their spin, these helical topological exciton-polaritons move in opposite directions along the surface of an equally specialized type of topological insulator. (2020-10-12)

INRS researchers design the world's fastest UV camera
The team of Professor Jinyang Liang, a specialist in ultrafast imaging at the Institut national de la recherche scientifique (INRS), in collaboration with an international team of researchers, has developed the fastest camera in the world capable of recording photons in the ultraviolet (UV) range in real time. This original research is featured on the front cover of the 10th issue of the journal Laser & Photonics Reviews. (2020-10-08)

An electrical trigger fires single, identical photons
Researchers at Berkeley Lab have found a way to generate single, identical photons on demand. The precisely controlled photon source, made from an atomically thin semiconducting material, could aid the development of advanced quantum communication. (2020-10-08)

Ultrasensitive microwave detector developed
A joint international research team from POSTECH of South Korea, Raytheon BBN Technologies, Harvard University, and Massachusetts Institute of Technology in the U.S., Barcelona Institute of Science and Technology in Spain, and the National Institute for Materials Science in Japan have together developed ultrasensitive sensors that can detect microwaves with the highest theoretically possible sensitivity. (2020-10-01)

The most sensitive and fastest graphene microwave bolometer
Scientists from Harvard, ICFO, MIT, Raytheon BBN Technologies and NIMS construct the fastest and most sensitive graphene-based microwave bolometer achieved so far. (2020-09-30)

Cancer's hidden vulnerabilities
To fight cancer more effectively, a Caltech researcher probes its inner workings for metabolic weaknesses. (2020-09-28)

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