Articles tagged with Excitons
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
Comprehensive medical research, clinical studies, and healthcare sciences focused on disease prevention, diagnosis, and treatment. Encompasses clinical medicine, public health, pharmacology, epidemiology, medical specialties, disease mechanisms, therapeutic interventions, healthcare innovation, precision medicine, telemedicine, medical devices, drug development, clinical trials, patient care, mental health, nutrition science, health policy, and the application of medical science to improve human health, wellbeing, and quality of life across diverse populations.
Comprehensive investigation of human society, behavior, relationships, and social structures through systematic research and analysis. Encompasses psychology, sociology, anthropology, economics, political science, linguistics, education, demography, communications, and social research methodologies. Examines human cognition, social interactions, cultural phenomena, economic systems, political institutions, language and communication, educational processes, population dynamics, and the complex social, cultural, economic, and political forces shaping human societies, communities, and civilizations throughout history and across the contemporary world.
Fundamental study of the non-living natural world, matter, energy, and physical phenomena governing the universe. Encompasses physics, chemistry, earth sciences, atmospheric sciences, oceanography, materials science, and the investigation of physical laws, chemical reactions, geological processes, climate systems, and planetary dynamics. Explores everything from subatomic particles and quantum mechanics to planetary systems and cosmic phenomena, including energy transformations, molecular interactions, elemental properties, weather patterns, tectonic activity, and the fundamental forces and principles underlying the physical nature of reality.
Practical application of scientific knowledge and engineering principles to solve real-world problems and develop innovative technologies. Encompasses all engineering disciplines, technology development, computer science, artificial intelligence, environmental sciences, agriculture, materials applications, energy systems, and industrial innovation. Bridges theoretical research with tangible solutions for infrastructure, manufacturing, computing, communications, transportation, construction, sustainable development, and emerging technologies that advance human capabilities, improve quality of life, and address societal challenges through scientific innovation and technological progress.
Study of the practice, culture, infrastructure, and social dimensions of science itself. Addresses how science is conducted, organized, communicated, and integrated into society. Encompasses research funding mechanisms, scientific publishing systems, peer review processes, academic ethics, science policy, research institutions, scientific collaboration networks, science education, career development, research programs, scientific methods, science communication, and the sociology of scientific discovery. Examines the human, institutional, and cultural aspects of scientific enterprise, knowledge production, and the translation of research into societal benefit.
Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
Comprehensive examination of tools, techniques, methodologies, and approaches used across scientific disciplines to conduct research, collect data, and analyze results. Encompasses experimental procedures, analytical methods, measurement techniques, instrumentation, imaging technologies, spectroscopic methods, laboratory protocols, observational studies, statistical analysis, computational methods, data visualization, quality control, and methodological innovations. Addresses the practical techniques and theoretical frameworks enabling scientists to investigate phenomena, test hypotheses, gather evidence, ensure reproducibility, and generate reliable knowledge through systematic, rigorous investigation across all areas of scientific inquiry.
Study of abstract structures, patterns, quantities, relationships, and logical reasoning through pure and applied mathematical disciplines. Encompasses algebra, calculus, geometry, topology, number theory, analysis, discrete mathematics, mathematical logic, set theory, probability, statistics, and computational mathematics. Investigates mathematical structures, theorems, proofs, algorithms, functions, equations, and the rigorous logical frameworks underlying quantitative reasoning. Provides the foundational language and tools for all scientific fields, enabling precise description of natural phenomena, modeling of complex systems, and the development of technologies across physics, engineering, computer science, economics, and all quantitative sciences.
A nanostructure composed of silver and an atomically thin semiconductor layer can be turned into an ultrafast switching mirror device, displaying properties of both light and matter. This discovery could lead to dramatically increased information transmission rates in optical data processing.
A team of researchers from OIST and Stanford University has demonstrated a powerful new alternative approach to Floquet engineering by showing that excitons can produce Floquet effects more efficiently than light. This breakthrough enables the creation of novel quantum devices and materials with significantly lower intensities.
Scientists have created a new quantum state, known as hybrid excitons, at the interface of organic and 2D semiconductors. This unique state enables ultrafast energy transfer, which holds promise for developing next-generation solar cells and optoelectronic components.
Scientists have detected the faint signals of electrons in organic materials, revealing new insights into the physics of photodegradation and long-term photoemission processes. By reimagining conventional spectroscopy setups, researchers have captured the exact mechanisms of weak charge accumulation, providing direct evidence for multi...
Scientists at OIST use advanced spectroscopy to track the evolution of dark excitons, overcoming the fundamental challenge of accessing these elusive particles. The findings lay the foundation for dark valleytronics as a field, with potential applications in quantum information technologies.
Researchers at the University of Innsbruck have developed a versatile method to control dark excitons in semiconductor quantum dots using chirped laser pulses and magnetic fields. This allows for the storage and manipulation of excitons, enabling new opportunities for quantum memory control and entangled photon pair generation.
Scientists observe subtle structural distortions and interactions influencing exciton relaxation dynamics in individual CNTs. The study reveals a new understanding of the local nanoscale environment's role in shaping exciton behavior.
A new model details the kinetics of exciton dynamics in OLED materials, enhancing lifetime and accelerating material development. The findings have potential to improve fluorescence efficiency, leading to more advanced OLED devices.
Researchers at CCNY have made a groundbreaking discovery of electronic interactions mediated via spin waves in 2D magnets. The interaction between excitons is controlled externally using a magnetic field, enabling the development of novel quantum transducers and advanced technologies.
Scientists at the University of Rochester have discovered a way to create artificial atoms within twisted monolayers of molybdenum diselenide, retaining information when activated by light. This breakthrough could lead to new types of quantum devices, such as memory or nodes in a quantum network.
Scientists have found a way to control electrons in molecules using tailored terahertz light pulses, potentially leading to advances in electronics, energy transfer, and chemical reactions. This new method allows for precise control of molecular states essential for processes like solar cells and LEDs.
Researchers have discovered that quantum materials can be used to sense the biological electrical activity of living cells with high speed and resolution. The technology uses light to track changes in the material's photoluminescence, mapping the electrical activity of heart muscle cells in real time.
A new technique allows for precise tracking of tiny particles known as dark excitons in time and space. This breakthrough has the potential to improve the quality and efficiency of solar cells and other devices.
Physicists at Brown University have observed a novel class of quantum particles called fractional excitons, which behave in unexpected ways. The discovery unlocks a range of novel quantum phases of matter, presenting a new frontier for future research.
Researchers demonstrated the existence of an Exciton-Polaron in a quasi-one-dimensional hybrid perovskitoid, showcasing its potential for optoelectronic applications. The study reveals that the one-dimensional lattice is soft and susceptible to reorganization, enabling tunable frameworks for new quantum technologies.
The research team identified a critical mechanism behind OLED performance degradation: interfacial exciton-polaron quenching. By controlling this phenomenon, they achieved an increase in efficiency of over 50% for red, green, and blue phosphorescent OLEDs and extended the lifespan of blue OLEDs by more than 70%.
Researchers induced fast switching between electrically neutral and charged luminescent particles in an ultra-thin, two-dimensional material. The result opens up new perspectives for optical data processing and flexible detectors.
Researchers from Osaka University have synthesized a new molecule that increases the power conversion efficiency of organic solar cells. The molecule's design reduces exciton binding energy, making it easier to convert sunlight into current. This breakthrough paves the way for high-performance and large-scale photovoltaic applications.
Researchers predict the existence of a new type of exciton with finite vorticity, called a 'topological exciton,' in Chern insulators. This prediction has the potential to enable the development of novel optoelectronic devices for quantum computing.
Researchers at Kyoto University have developed a new method to reduce optical interference and measure the quantum coherence time of moiré excitons, which are electron-hole pairs confined in moiré interference fringes. This breakthrough enables the realization of quantum functionality in next-generation nano-semiconductors.
Researchers have developed a flat lens made of tungsten disulphide with concentric rings that focuses light using diffraction, leveraging quantum effects to enhance its efficiency. The lens is half a millimeter wide and just 0.6 nanometres thick, making it the thinnest lens on Earth.
Researchers have developed a new method to visualize the quantum mechanical wave function of excitons in organic semiconductors. This understanding is essential for developing more efficient materials with organic semiconductors. The technique, known as photoemission exciton tomography, provides insights into the behavior of excitons i...
Kobe University scientists develop material guideline for high-efficiency PV cells, OLED displays and anti-cancer therapies by understanding energy transfer between molecules. The research enables aligned electron spin states to combine low-energy photons into a high-energy photon.
Researchers at Kyoto University have determined the magnitude of spin-orbit interaction in acceptor-bound excitons in a semiconductor. The study revealed two triplets separated by a spin-orbit splitting of 14.3 meV, supporting the hypothesis that two positively charged holes are more strongly bound than an electron-and-hole pair.
Researchers have developed a novel 'nano active control platform' to control excitons and trions, providing valuable insights into the optical properties of two-dimensional semiconductors. The breakthrough discovery enables real-time analysis of nano-light properties with exceptional spatial resolution.
The study successfully manipulates distinct exciton species within a hybrid monolayer WSe2-Ag nanowire structure, exhibiting high coupling efficiency with surface plasmon polaritons. This breakthrough enables precise control over light emissions and paves the way for advanced optical and quantum applications.
Physicists at Paderborn University have developed a new solar cell design using tetracene, which significantly increases efficiency. The introduction of defects in the organic layer accelerates exciton transfer to silicon, reducing energy losses and increasing overall yield of usable energy.
Scientists use a special microscope to break up the bond between electrons and holes in semiconductors, revealing that hole interactions determine charge transfer processes. The findings have implications for future computer and photovoltaic technologies.
Scientists have successfully discovered the mechanism of trion generation using a tip-enhanced cavity-spectroscopy system. This approach enables nanoscale control and investigation of trion emission properties.
Researchers develop efficient TADF or RTP materials by regulating energy differences between triplet states, leading to controlled transitions of triplet excitons. By tuning conjugated structures and stacking modes, they achieve precise management of triplet excitons.
Researchers at UC San Diego used terahertz time-domain spectroscopy to observe anomalous terahertz light amplification in Ta2NiSe5, uncovering its exciton condensate properties. This technique may allow for the discovery of new light-induced phenomena and their potential applications in entangled light sources.
A team of researchers has precisely measured exciton binding energies in organic semiconductors, finding unexpected correlations between the energy and material type. The study's high precision will help discuss the exciton nature of organic semiconductors with greater confidence.
The study reveals that excited electrons in perovskites cause a shift towards increased symmetry in the crystal lattice. This attractive interaction between excitons could be exploited to enhance electron transport and improve solar cell performance.
Researchers at Columbia University have created the fastest and most efficient semiconductor yet, a superatomic material called Re6Se8Cl2. Excitons in this material can bind with phonons to create acoustic exciton-polarons that move faster than electrons in silicon, potentially leading to devices with speeds of femtoseconds.
Researchers from Monash University have introduced a new theoretical study on quantum impurities, exploring their behavior in two-dimensional semiconductors. The 'quantum virial expansion' method sheds light on the complex interactions between impurities and their surroundings in 2D materials.
Researchers found that changing the stacking order of layers in transition metal dichalcogenide (TMD) semiconductors creates new optoelectronic devices with tailor-made properties. The study reveals dark excitons exclusively located in the top layer, which can be utilized for optical power switches in solar panels.
Researchers at Caltech have detected magnetically bound excitons in an antiferromagnetic Mott insulator, a first in real-time experiments. This finding has implications for the development of new exciton-related technologies that harness both magnetic and optical properties.
Researchers have demonstrated photochemical upconversion in a solid state, enabling potential innovations in renewable energy and water purification. The breakthrough could also enable targeted laser treatments for tumors and medical applications.
Scientists have developed a method to enhance valley coherence in monolayer MoS2 by encapsulating it with graphene. This structure achieved ~100% degree of linear polarization, indicating a valley coherence time at least 10-fold longer than previous reports.
Researchers have discovered Rydberg moiré excitons in WSe2 monolayer semiconductor adjacent to graphene, exhibiting multiple energy splittings and a pronounced red shift. The discovery holds promise for applications in sensing and quantum optics due to the strong interactions with the surroundings.
Researchers at ETH Zurich have found a novel mechanism to produce nanoscale light sources by exploiting the antenna-like behavior of semiconductor materials. By varying the voltage and measuring the current through a tunnel junction, they discovered an exciton resonance that acts as an effective antenna, enabling efficient light emission.
Scientists at POSTECH successfully grow two-dimensional molecular crystals, demonstrating control over exciton interactions. The findings could enable various applications in organic semiconductors and solar power generation.
Researchers at UC Santa Barbara created a new material made of bosonic particles called excitons, forming a correlated insulator. The discovery uses a moiré platform and pump-probe spectroscopy to study the behavior of bosons in a real material system.
University of Washington researchers have detected atomic vibrations, also known as phonons, in a two-dimensional atomic system. The discovery could help encode and transmit quantum information through light-based systems.
Researchers aim to understand and utilize quasiparticles called excitons, which can transport energy without a net electric charge. The goal is to design energy-efficient systems that detect and emit light across a wide range of frequencies.
Research team settles decade-long debate on Ta2NiSe5's microscopic origin of symmetry breaking; structural instability hinders electronic superfluidity. Advanced experiments and calculations confirm crystal structure changes as driving force behind phase transition.
Researchers at UChicago found a surprising connection between photosynthesis and exciton condensates, a state that allows frictionless energy flow. The discovery could lead to more efficient materials and technologies, such as superconductors.
Researchers from the ARC Centre of Excellence in Exciton Science have demonstrated a new chip-scale approach using OLEDs to image magnetic fields, offering a potential solution for portable quantum sensing. This technique enables small, flexible, and mass-producible sensing without requiring input from a laser or cryogenic temperatures.
Researchers boosted multi-hole water oxidation catalysis on hematite photoanodes using UV excitation, increasing surface holes and improving PEC activity by one order of magnitude.
Researchers found that two outermost electrons from each nickel ion behaved differently, cancelling each other out in a phenomenon called a spin singlet. This led to the discovery of two families of propagating waves at dramatically different energies, contradicting expectations of local excitations.
Researchers predictably synthesized broadband white-light-emitting perovskites using a steric hindrance regulation strategy, exhibiting tunable emission from 400 to 800 nm. The approach opens a general way to directed synthesis of abundant white-light-emitting perovskites.
The POSTECH team developed a multifunctional tip-enhanced spectroscopy that dynamically controls the physical properties of quasiparticles in 2D materials. This technology increases interlayer excitons' luminous efficiency by 9,000 times and modulates their energy.
Researchers summarize recent progress of organic RTP materials with long lifetime, large Stokes shift, stimuli-responsiveness and potential applications in display, environmental detection and bioimaging. Challenges to overcome include achieving high quantum yield, short lifetime and rich luminous colors.
Researchers have presented an overview of recent progress in moiré photonics and optoelectronics, highlighting the emergence of novel quantum phenomena and their potential applications. Moiré superlattices introduce a new paradigm for engineering band structures and exotic quantum states.
Researchers predict that layered electronic 2D semiconductors can host a quantum phase of matter called the supersolid. A solid becomes 'super' when its quantum properties match those of superconductors, simultaneously having two orders: solid and super. The study reports the complete phase diagram of this system at low temperatures.
Researchers have developed a new type of OLED display that uses strong coupling of light and matter to improve color saturation and brightness. The displays, known as polariton-based OLEDs, achieve this without compromising efficiency or viewing angle dependency.
Scientists have directly observed ultrafast motion of nonequilibrium excitons in monolayers WSe2, MoWSe2, and MoSe2, traveling at least 200 nm within 1 ps. This 'superdiffusion' process could break the traditional limitation of photovoltaic efficiency and be used for ultrafast electronic devices.
Researchers have observed exciton quasiparticles confined in atomically thin materials, opening paths to controlling excitons for quantum and optolectronic applications. Custom-built materials can now be designed to confine and manipulate excitons.
Researchers discuss the construction, properties, and applications of 2D/quasi-2D perovskite-based heterostructures. These heterostructures offer novel functionalities for photovoltaic solar cells, LEDs, and photodetectors.
Researchers at IBS CSLM discovered pair quasiparticles in a classical system of microparticles driven by viscous flow. These long-lived excitations exhibit anti-Newtonian forces that stabilize pairs, similar to the behavior of Dirac quasiparticles in graphene.