Articles tagged with Optics
Researchers at the University of Rochester developed a new microcomb laser design that provides low power efficiency, high tunability, and easy operation. The simplified approach enables direct control over the comb with a single switch, opening up potential applications in telecommunications systems, LiDAR for autonomous vehicles.
Researchers have developed a new device that can determine photon pair properties in a single shot, improving precision and accuracy in quantum technologies. The metasurface-enabled multiport interferometer reduces size, weight, and power while increasing reliability.
Scientists at the University of Rochester have developed a technique for pairing particles of light and sound, allowing for faithful conversion of information stored in quantum systems. The method uses surface acoustic waves, which can be accessed and controlled without mechanical contact, enabling strong quantum coupling on any material.
Scientists at Harvard John A. Paulson School of Engineering and Applied Sciences have developed a compact, single-shot polarization imaging system that can provide a complete picture of polarization. The system uses two thin metasurfaces to capture the most complete polarization response of an object in real-time.
Lan Yang and Jie Liao demonstrate a transformative approach to overcome limitations of whispering-gallery-mode (WGM) resonators, enabling simultaneous monitoring of multiple resonant modes within a single WGM resonator. This allows for greater resolution and accuracy in detecting molecules, with a potentially limitless range of measure...
A new study shines light on the properties of hexagonal boron nitride, a material used in electronic and photonics technologies. The research reveals fundamental energy excitation occurring at 285 millielectron volts, triggering single photons in harmonic electronic states.
Researchers from the University of Copenhagen have developed a new method for measuring time using superradiant atoms, which could improve precision in areas like GPS systems and space travel. The technique uses superradiance to read out atomic oscillations without heating up the atoms.
Researchers upgraded a photoelectron momentum microscope to use two undulator beamlines, enabling element-selective measurements and precise analyses of valence orbitals. This innovation provides deeper insights into the behavior of electrons in materials, advancing fields like condensed matter physics and materials science.
A team of researchers from the University of Rochester used adaptive optics to identify rare retinal ganglion cells that could help explain how humans perceive color. These non-cardinal RGCs may work in tandem with cardinal RGCs to create more complex color perceptions.
Researchers at Linképing University have developed a digital display screen where LEDs react to touch, light, fingerprints, and the user's pulse, among other things. The screen can also be charged through the screen due to its ability to act as solar cells.
The researchers achieved 20-level intermediate states of phase change materials using a micron-scale laser writing system. This allows for the demonstration of ultra-high flexibility in phase modulation and potential applications in neuromorphic photonics, optical computing, and reconfigurable metasurfaces.
Researchers have developed a miniaturized optical sensor that can detect glucose levels in human blood plasma with comparable sensitivity to laboratory-based sensors. The device operates wirelessly using a coin battery and has demonstrated its viability in detecting glucose levels between 50-400mg/dL.
Researchers at the University of Rochester are developing a multimodal, non-invasive method to study the brain's physiology and reduce neurological issues associated with ECMO therapy. The technique uses electroencephalography, diffuse correlation spectroscopy, and evoked potentials to monitor blood flow and neural activity in the brain.
Scientists from CNR Nanotec and the University of Warsaw created a new method to simulate interactions between artificial atoms by forming macroscopic coherent states. They used optically tailored quantum droplets of light that became bound together, enabling stable and long-lived polariton fluids with unprecedented coherence scales.
Researchers at NIST have developed compact chips that convert light into microwaves with reduced timing jitter, improving GPS accuracy, phone connections, radar systems and astronomical images. This technology has the potential to increase radar sensitivity, improve analog-to-digital converters and enhance the clarity of images.
Rice University researchers have developed a transformative approach to harnessing the catalytic power of aluminum nanoparticles by annealing them in various gas atmospheres at high temperatures. This allows for modifying the structure of the oxide layer, making the nanoparticles versatile tools for different applications.
Researchers demonstrate a way to amplify interactions between particles to overcome environmental noise, enabling the study of entanglement in larger systems. This breakthrough holds promise for practical applications in sensor technology and environmental monitoring.
Researchers engineered the electron density of Pd single atoms with twinned Pd nanoparticles, creating strong electronic metal-support interactions for efficient CO2 photoreduction. The team found that Pd-TPs served as an electron donor, enriching electron density on catalytic centers and accelerating carbonyl desorption.
Researchers have created a computer using an array of VCSELs that leverages optical feedback to efficiently solve complex optimization problems. The system encodes information in linear polarization states, minimizing interactions between variables and overcoming the von Neumann bottleneck.
Researchers at Osaka Metropolitan University have discovered a magnetoelectric antiferromagnet LiNiPO4 that exhibits large nonreciprocal absorption of light. The material's unique property allows for the switchable optical diode effect, potentially enabling more compact and efficient optical isolators.
Researchers at Hiroshima University have found that quantum systems exhibit contextual behavior, where measurements change the results, rather than particles separating from their properties. This discovery sheds light on the counterintuitive nature of quantum mechanics and may lead to practical applications in quantum computing.
Researchers have demonstrated a connection between quantum entanglement and topology, allowing for the preservation of quantum information even when entanglement is fragile. This breakthrough enables a new encoding mechanism that utilizes entanglement to encode quantum information in scenarios with minimal entanglement.
A team of Chinese researchers has developed an ultrathin optical crystal with high energy efficiency, revolutionizing next-generation laser technology. The twist boron nitride (TBN) crystal has a micron-level thickness and outperforms traditional crystals by 100 to 10,000 times in terms of energy efficiency.
Researchers have successfully synthesized a new material that exhibits self-recoverable near-infrared (NIR) mechanoluminescence, a property useful for biomedical imaging and other applications. The material's mechanism is attributed to its piezoelectricity, which generates excited states in Cr³⁺ ions upon mechanical stimulation.
Researchers developed a novel phase imaging technique using intensity correlation measurements that is immune to phase instability. This method can capture high-resolution images of transparent and optically thin samples, such as cell cultures, with improved accuracy.
A team of engineers has developed a novel printing method called deep-penetrating acoustic volumetric printing (DVAP) that uses soundwaves to solidify biologically compatible structures in deep tissues. The technique involves a specialized ink that reacts to ultrasound waves, enabling the creation of intricate structures for biomedical...
Researchers at the University of Colorado Boulder have developed a new technique using doughnut-shaped beams of light to take detailed images of objects too tiny to view with traditional microscopes. This approach could help scientists improve nanoelectronics by inspecting semiconductors without damaging them.
Vectorial adaptive optics (V-AO) corrects both polarization and phase aberrations, improving optical resolution and accuracy. The new technique is poised to revolutionize the optics community with its potential in enhancing system performance and enabling new applications.
Scientists superposed two light beams twisted in the clockwise direction to create anti-clockwise twists in the dark regions of the resultant superposition. This discovery represents a step towards observing a peculiar phenomenon known as quantum backflow.
Researchers have shrunk a mode-locked laser to the size of an optical chip using a novel integrated platform. The device generates ultrashort pulses with high peak power and coherence properties.
Researchers develop optical PUF with random wrinkles structure, generating unique digital values difficult to predict. This technology has potential beyond authentication systems, including anti-counterfeiting and data storage technologies.
Scientists at the University of Nebraska-Lincoln have developed a system that can adjust the size, shape, and refractive index of microscopic lenses in real-time. The design uses hydrogels and polydimethylsiloxane to create a dynamic platform for soft robotics and liquid optics applications.
Researchers developed an accelerating wave equation to solve daily phenomena, revealing a well-defined direction of time. The framework also predicts energy conservation in certain situations, including exotic materials.
Researchers create practical way to implement superlensing with minimal losses, breaking through diffraction limit by nearly four times. The method allows scientists to improve super-resolution microscopy, advancing imaging in fields like cancer diagnostics and archaeology.
Scientists at Max Planck Institute for the Structure and Dynamics of Matter discovered a way to create a superconducting-like state in K3C60 using laser light. By tuning the laser frequency, they reduced pulse intensity by a factor of 100 while maintaining high temperatures.
Osaka Metropolitan University scientists have developed a super-efficient laser light-induced detection method that reduces detection time from hours to minutes. The technique allows for ultrafast and ultrasensitive measurement of biological nanoparticles, including exosomes, with diameters of 50–150 nm.
A team of scientists at Osaka Metropolitan University has made significant strides in precision printing using an optical vortex laser-based technique. This innovation enables the precise placement of minuscule droplets with micrometer-scale accuracy, opening up new possibilities for microprinting technologies.
Researchers have demonstrated an achromatic diffractive liquid-crystal optics system with ultrathin formfactor and light weight, improving color performance and overcoming chromatic aberration in virtual reality displays.
Scientists at Beijing Institute of Technology have developed an ultrafast quasi-three-dimensional technique, enabling higher dimensions to analyze ultrafast processes. This method breaks through the limitations of original observational dimensions, enhancing our ability to analyze ultra-fast processes comprehensively.
Matthew Sfeir will receive a $1.25 million grant to measure the quantum properties of conducting organic polymers using far-infrared and terahertz light sources. The research aims to develop transparent electrical conductors for advanced photonic and quantum-based technologies.
The article introduces a new design method for on-chip metalens that enables efficient optical interconnection between devices with large scaling ratios. The optimized metalens achieves high transmission efficiency, lower stray light, and improved focusing efficiency compared to traditional waveguide tapers.
Researchers at Stevens Institute of Technology use a 350-year-old mechanical theorem to explain complex behaviors of light waves, showing a direct relationship between entanglement and polarization. This connection enables the deduction of hard-to-measure optical properties from simpler light intensity measurements.
The article discusses measurement techniques for aspheric surface parameters, including general fitting and center-of-curvature-based methods. These methods assess the quality of aspheric surfaces and provide direction for processing and suitable targets for processing.
A team of researchers led by Professor Aydogan Ozcan has developed methods for designing all-optical universal linear processors of spatially incoherent light. These processors use successive diffraction of light to perform arbitrary linear transformations without external digital computing power, enabling fast and energy-efficient com...
Researchers led by Prof. Mingyu Li created a graphene microfiber composite structure to improve modulation depth and achieve two switchable mode-locked pulses. The study expands graphene's application in fiber lasers, enabling dual-wavelength tunability and bright-dark soliton pairs.
A team of researchers developed a one-of-a-kind spatial light modulator capable of ultra-fast, amplitude-only modulation without modifying the optical phase. The device uses chalcogenide phase change materials, achieving improvements that could be exploited in wavefront shaping experiments and communications.
Scientists have discovered a way to control site-specific nonlinear optics using plasmonic nanocavities. The study found that the broadening of nonlinear optical responses can be achieved by manipulating both nanometer- and micrometer-scale structures in tip-substrate nanocavities.
Researchers have developed a general methodology to measure light-to-heat conversion efficiency (LHCE) of solid materials. The PEE method simulates laser heating with electric heating and accurately calculates LHCE for various organic and inorganic materials, offering a robust alternative to existing colloidal solutions-based methods.
Researchers develop isothermal-FLUCS, a technique that controls intracellular flows while minimizing heating impact. The new method achieves thermoviscous flows with magnitudes exceeding natural streaming in Caenorhabditis elegans zygotes.
The proposed pointwise optimization approach combines global search and accurate calibration to improve the OPA's performance in beam steering, focusing, and energy efficiency. It achieves rapid and precise phase calibration with a 53.5% increase in convergence rate and a 9.7% decrease in time consumption compared to traditional algori...
The UW students' achievement enables the implementation of a fractional Fourier Transform in optical pulses, allowing for more precise pulse identification and filtering. This innovation has significant implications for spectroscopy and telecommunications, where precise signal processing is crucial.
Researchers at Columbia University develop an energy-efficient method for transferring larger quantities of data over fiber-optic cables by using wavelength-division multiplexing and Kerr frequency combs. The new technology improves on previous attempts to transmit multiple signals simultaneously, enabling systems to transfer exponenti...
An international team has made a breakthrough in the study of topological phases by discovering that sub-symmetries can protect topological boundary states. This challenges the traditional common belief about the relationship between topological invariants and symmetries.
Researchers have developed a fully photostable and photoswitchable nanoparticle that can be controlled indefinitely using near-infrared light. This breakthrough has the potential to revolutionize fields such as optical memory, super-resolution microscopy, and bioimaging.
A team of scientists at DESY has developed a new technique using X-rays to image biological specimens without damaging them. The method, which generates high-resolution images at nanometre resolution, could be used for applications such as imaging whole unsectioned cells or tracking nanoparticles within a cell.
Researchers at the Beckman Institute for Advanced Science and Technology have developed a new framework for super-resolution ultrasound using deep learning, reducing processing speeds from minutes to seconds. The new technology enables real-time blood flow visualization, overcoming challenges faced by conventional methods.
Scientists developed a new method to manipulate light using non-Hermitian theory, enabling unidirectional control of surface plasmon polaritons. This breakthrough could lead to improved quantum sensors and applications in disease diagnosis and atmospheric gas detection.
Researchers developed apochromatic X-ray lenses with sub-micrometer accuracy, achieving focus over an X-ray energy range from 7 to 12 keV. The technology holds promise for laboratory and accelerator-based applications in materials science, energy sciences, and biology.
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.
Scientists at the Max Planck Institute successfully induced high-temperature ferromagnetism in YTiO3 by applying laser pulses, raising the transition temperature to triple its original value. This breakthrough discovery opens new avenues for exploring and manipulating magnetic properties of materials.