Articles tagged with Photons
Lin X. Chen, a senior chemist at Argonne National Laboratory and Northwestern University professor, has received the 2020 Award in Experimental Physical Chemistry for her fundamental contributions to elucidating excited state structures, dynamics, and energetics of light harvesting systems.
Researchers from ORNL and Purdue University successfully design a quantum frequency beam splitter using standard lightwave communications technology, enabling controlled photon interactions. The team also demonstrates a coincidence-basis controlled-NOT gate and completes the first demonstration of a frequency tritter.
Scientists have developed a new method to record extremely fast processes using X-ray lasers. By harnessing the random nature of these pulses, they can now create images with precisely controlled parameters. This breakthrough enables the study of non-linear effects and chemical reactions.
Researchers at Princeton University have successfully established a long-distance relationship between two silicon quantum bits, paving the way for more complex calculations and potentially cheaper quantum computers. The breakthrough uses light-based communication to transmit messages between qubits on a computer chip.
The NIST study suggests a new definition for the optical watt based on radiation force and speed, offering a more precise, less expensive and more portable method for measuring light power. The proposed approach also simplifies calculations of mass and force, making it simpler as a primary standard.
Researchers at NIST have developed methods to measure the efficiency of five single-photon detectors, which are used in various applications such as optical communications and astrophysics. The study provides a tool for verifying future detection standards and aims to improve accuracy and reliability in these devices.
Physicists at NIST have achieved a major new feat by creating a bizarre quantum interference between two photons of markedly different colors, originating from different buildings. This experiment is an important step towards future quantum communications and computing.
Scientists at ICFO have created a new microscopy technique that allows them to study the dynamics of individual quantum dots without degrading the samples or relying on fluorescent labels. By using laser pulses to promote QDs into excited states, they can image and track the evolution of charged particles within the nanoscale.
Researchers improved a computer program to simulate photon behavior in intergalactic space. They found that particles flying to Earth are deflected by magnetic fields or interact with hydrogen plasma, preventing them from reaching their destination.
Researchers at the Institute for Basic Science discovered a carrier multiplication process in 2D semiconductors that could improve the efficiency of solar cells. The phenomenon is more efficient in 2D materials than in bulk semiconductors and has the potential to increase the maximum power conversion efficiency up to 46%
Scientists have found a way to pair silicon with organic molecules to transfer energy between them, improving efficiency in converting light into electricity. This breakthrough has implications for information storage, solar energy conversion and medical imaging applications.
Researchers created a compact device to interface with electronic architecture of traditional computers using light-encoded information. The device uses surface plasmon polariton to confine light into nanoscopic dimensions, overcoming the incompatibility between electrical and optical computing.
Researchers have developed ternary organic solar cells with non-fullerene electron acceptors or polymer donors, improving spectral response and photon-harvesting capabilities. The addition of these third components enhances energy and charge transfer, leading to increased efficiency and potentially semi-transparent solar cells.
An international team of researchers has identified a previously unseen component of gamma-ray bursts, emitting trillions of times more energetic photons than visible light. The discovery supports the possibility that inverse Compton emission is commonly produced in gamma-ray bursts.
The MAGIC telescopes detected the first-ever TeV photons from a gamma-ray burst, providing critical new insights into the physical processes at work in these cosmic events. The discovery sheds light on the mysteries surrounding gamma-ray bursts and their energetic emissions.
Researchers at NIST have created a high-resolution camera with over 1,000 sensors to detect chemical signs of life on other planets and dark matter. The camera's success is crucial for future space-based telescopes and NASA's Origins Space Telescope project.
Scientists have found a way to harness excess energy from photons that are too energetic for materials to absorb, potentially increasing the efficiency of solar panels. By combining a perovskite with an acceptor material, hot electrons can be readily absorbed, even without slowing down their loss of energy.
Researchers have successfully created a new one-way street for light by cooling photons to a Bose-Einstein condensate. This process causes the light to collect in optical valleys from which it can no longer return, effectively irreversibly dividing the light beam. The findings could be of interest for future quantum communication.
Researchers create two-dimensional system to trap photons, which behave like massive quasiparticles with a magnetic moment. This discovery could lead to new optoelectronic devices and unique quantum states of matter.
Using patterns of light, scientists aim to build a faster and more secure quantum network. The research could lead to higher information capacity and stronger security in quantum protocols.
Researchers use structured light to create a larger encoding alphabet, stronger security and better resistance to noise. The use of patterns of light enables higher information capacity and improved robustness against noise.
A UC Riverside-led research team has discovered a new quantum process in valleytronics that can speed up the development of this emerging technology. The breakthrough, which uses local energy minima in semiconductors, enables the creation of information processing schemes superior to current charge-based technologies.
Scientists have created a new method to isolate quantum images from classical illumination, enabling ultra-sensitive microscopy and potential applications in quantum communications. By leveraging image distillation, they can retrieve 'quantum illuminated' images even with high classical illumination.
Researchers have successfully created an efficient quantum-mechanical light-matter interface using a microscopic cavity, enabling interactions between individual photons and artificial atoms. The experiment demonstrates the potential for new quantum technological applications in photonics and quantum information processing.
Researchers have developed a method to synthesize and trap trions that remain stable at room temperature, enabling manipulation and study of their fundamental properties. The work has implications for technologies such as bioimaging, chemical sensing, energy harvesting, solid-state computing and quantum computing.
Scientists at TU Wien discover that atomic defects and mechanical strain interact to produce single photons, enabling experiments in quantum information and cryptography. This phenomenon was previously unknown and has opened up new possibilities for materials science.
Scientists at UNIGE have entangled three pairs of photons to create a highly-correlated triangle, exhibiting strong quantum correlations. This discovery could lead to the development of new ultra-secure encryption keys and revive fundamental quantum physics research.
Researchers at Argonne National Laboratory have discovered a key property of donut-like nanoparticles called semiconductor quantum rings, which may find application in quantum information storage, communication, and computing. The team achieved coherent directional control over light emission by breaking the symmetry of the ring shape.
The researchers developed a microfluidic platform to study an artificial light-harvesting complex inspired by photosynthetic bacteria. They found that at low light intensities, the system absorbs photons efficiently, while high intensities trigger the release of excess energy as a safety valve.
Researchers create and observe a single phonon in diamond at room temperature, bringing quantum behavior closer to everyday life. This breakthrough technique can now be used to probe other materials for quantum vibrations, potentially leading to advancements in solar cells and quantum computing.
University of Illinois researchers Kwiat and Kaneda have built a single-photon source that produces 30 photons at unprecedented efficiencies. By using time multiplexing, they reduced the loss rate to 1.2 percent per cycle, guaranteeing at least one photon pair production per run.
Researchers at TU Wien have developed a new measurement protocol that enables direct measurement of the quantum phase of electrons. This breakthrough could lead to better understanding of important phenomena in photosensors and photovoltaics.
Researchers at Goethe University use new super COLTRIMS apparatus to measure minuscule effect on photon momentum. They find electrons receive unexpected additional momentum from magnetic fields, altering tunneling in strong-field ionization.
A team of LSU researchers has successfully demonstrated a method to generate groups of photons with manipulable quantum properties, known as multiphoton states. By subtracting out some photons, they can reshape the form of the wavepacket and artificially increase the number of photons in it.
A new NASA visualization reveals how a black hole distorts space, creating a warped view of its surroundings like a carnival mirror. The extreme gravity bends light from the accretion disk, producing a misshapen appearance.
A research group converts absorbed photons into twice as many excitons with an organic monolayer on a gold nanocluster surface, achieving high-efficiency energy conversion. The researchers also found that the newly formed excitons have a significantly longer lifetime compared to conventional surfaces.
Researchers at the University of Illinois created a unique quantum-mechanical state, a three-photon color-entangled W state, which retains entanglement even with one photon lost. This state enables novel quantum applications and tests fundamental physics.
Researchers at Stevens Institute of Technology have developed a nano-scale chip that facilitates photon interactions with much higher efficiency than any previous system. The breakthrough could enable the creation of powerful quantum computing components such as photonics logic gates and entanglement sources.
Scientists are developing a highly sensitive detector capable of sensing single photons, which could be crucial for finding Earth-like planets around other stars. The detector leverages Quanta Image Sensor technology and has several advantages, including the ability to operate at room temperature and resistance to radiation.
Researchers from the University of Pennsylvania have developed a reconfigurable topological insulator that can route photons around defects, increasing efficiency and speed. This breakthrough has potential applications in high-capacity data routing for future communication networks.
Argonne scientists develop a new approach to couple magnetization to superconductivity, paving the way for quantum information systems. This breakthrough enables precise manipulation of quantum information through the creation of an 'echo chamber' for energy and quantum information.
Researchers have directly observed the non-Abelian Aharonov-Bohm Effect, a predicted exotic phenomenon involving optical waves and synthetic magnetic fields. The finding may offer a step toward fault-tolerant quantum computers.
Researchers at the University of Innsbruck have successfully transferred quantum entanglement between matter and light over 50 kilometers using fiber optic cables. This achievement paves the way for building inter-city quantum networks, which could enable secure communication and distributed sensor networks.
Quantum dots have been successfully modified to produce interference-free photons, paving the way for quantum communication. Researchers eliminated interferences by adding an aluminium arsenide layer grown above the quantum dots in the wetting layer.
Researchers have demonstrated a loophole-free Bell test with the measurement settings determined by remote cosmic photons, verifying the completeness of quantum mechanics with high-confidence probability. The experiment closed loopholes that had long confounded tests of quantum mechanics, providing new evidence of quantum interactions.
The HADES experiment simulates electromagnetic radiation from colliding neutron stars, revealing temperatures of 800 billion degrees Celsius. The research provides insight into the cosmic kitchen for heavy nuclei fusion.
Researchers at Columbia University have developed a new design rule for generating excitons in organic molecules. This innovation enables the creation of more efficient solar cells and opens up new avenues for applications in fields such as photocatalysis, sensors, and imaging.
Researchers at Purdue University have successfully created a quantum spin wave for light that only flows in one direction. This breakthrough has significant implications for future nanotechnologies, enabling information to be transmitted securely and efficiently.
Researchers successfully recorded sequences of up to 1,000 sharp images of live mitochondria at 1.5 frames per second using STED microscopy. By exploiting the probabilistic nature of photobleaching, scientists can distinguish between different regions of the cell and achieve unprecedented resolution.
The U.S. Department of Energy has approved the next phase of the $815M upgrade of the Advanced Photon Source, a premier national research facility that will enable scientists to see things at a scale they have never seen before with storage-ring X-rays. The upgrade positions the APS to be a global leader among the new generation of sto...
Researchers create device that exploits quantum principles to detect phonons, enabling precise measurement of individual sound particles and paving the way for new types of quantum devices. This breakthrough could lead to more compact and efficient quantum computers that operate by manipulating sound rather than light.
Researchers from Berkeley Lab and universities explored human evolution by studying chromosome regions. They discovered massive genetic material in centromere-proximal regions, including unique variation in genes that shape our sense of smell. Meanwhile, scientists created new spiraling crystals made of stacked layers of germanium sulf...
Scientists have developed a microchip that simulates particle interactions in a hyperbolic plane, a surface where space curves away from itself at every point. This research may advance understanding of materials relevant to Army goals and help explore questions in other fields, including communication networks.
Researchers at the University of Vienna successfully implemented a counterfactual communication protocol, where information travels from Bob to Alice while photons travel in the opposite direction. This innovation resolves two major drawbacks of previous implementations and contradicts a crucial premise of communication theory.
Researchers at Argonne National Laboratory have developed a novel method to overcome limitations of high-energy X-rays, enabling sharper imaging of complex materials. This breakthrough allows scientists to gain better information about material interfaces and control the behavior of new materials.
Purdue University researchers have built a gate that manipulates quantum information in a predictable and deterministic way, enabling efficient and stable quantum information processing. The gate creates one of the largest entangled states of quantum particles to date, using four qudits encoded in only two photons.
Researchers from ETH Zurich have discovered a way to boost polariton-polariton interaction, enabling strong coupling between matter and light. This breakthrough opens up new perspectives for photonics and many-body physics.
The City College of New York research team, led by Professor Robert R. Alfano, has identified a new class of photons dubbed 'Majorana photons.' These unique photons have distinct properties that enable deeper penetration into brain tissues and microtubules, providing fundamental information about the brain's structure and function.
Researchers at Rice University have created a device that channels waste heat into light, enabling more efficient solar energy systems. The technology, which utilizes carbon nanotube films, aims to simplify the process of turning heat into electricity with high efficiency.
Researchers at TU Dresden have created a method to free trapped photons in OLEDs, boosting efficiency by up to 76.3%. The technique uses reactive ion etching to generate controllable nanostructures that can be tailored for optimal outcoupling.