Articles tagged with Optics
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...
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...
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.
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.
A team of researchers has achieved unparalleled precision in measuring the time delay between two photons using frequency-resolving sampling measurements. This breakthrough enables faster and more efficient characterisation of nanostructures, including biological samples and nanomaterial surfaces.
The City University of Hong Kong has developed a novel electron microscope that combines scanning and transmission electron microscope modes in a compact format. The device can produce high-resolution images in five minutes, enabling the study of atom dynamics and beam-sensitive materials.
Researchers develop a new technique to measure blood attenuation using a fluorophore-coated guidewire, improving the accuracy of near-infrared fluorescence in cardiovascular imaging. The method provides accurate information on vessel walls and outperforms existing correction methods.
Scientists found that oxocarbon-based dyes have intermediate electronic configurations between closed-shell and open-shell forms. The study reveals that longer wavelengths of near-infrared light absorption increase the contribution of open-shell forms in the dye.
A robust phase extraction method for overcoming spectrum overlapping in shearography has been proposed, achieving high-quality phase extraction. The method uses a linearly transformed elliptical window to maximize the use of spectrum information and improve phase extraction quality.
A research team at Osaka Metropolitan University has developed a technique to directly observe changes in the electronic state of light-emitting electrochemical cells (LECs) during electroluminescence. This breakthrough enables improvements in luminous efficiency, paving the way for more efficient and reliable OLEDs and LECs.
A new technology uses light-induced convection to enhance the permeability of cell membranes, allowing for efficient and selective delivery of biofunctional molecules to targeted cells. This results in lower concentrations of drugs needed for testing and potentially reduced costs and faster drug discovery.
Georgia Tech researchers develop new process using 2D materials to create LED displays with smaller pixels, achieving an array density of 5,100 pixels per inch. The technology enables full-color realization of micro-LED displays, with potential applications in virtual and augmented reality.
Researchers have devised a new mechanism to generate high-energy 'quantum light', which could reveal new properties of matter at the atomic scale. The theory predicts a way to control the quantum nature of light using correlated emitters with a strong laser.
Scientists have experimentally obtained a 2/3-octave-spanning microcomb in the broadband modulational instability state, featuring a spectrum from 1240 nm to 1950 nm and a mode spacing of 10 GHz. They also observed a novel soliton structure in near-zero anomalous-dispersion regime, dubbed 'anomalous-dispersion based near-zero-dispersio...