Scientists have developed a reliable way to discover the high-Q modes in a dielectric nanocavity
Tag: OPTICS
Redox imaging allows measurement of drug responses in lab-grown cancer samples
Scientists have developed a nondestructive way of measuring drug treatment responses in lab-grown cancer samples
Looking at optical Fano resonances under a new light
Scientists advance understanding of optical Fano resonances and show new ways to manipulate light with metamaterials
Light it up: uOttawa researchers demonstrate practical metal nanostructures
Researchers at the University of Ottawa have debunked the decade-old myth of metals being useless in photonics – the science and technology of light – with their findings, recently published in Nature Communications, expected to lead to many applications in…
Study finds plants would grow well in solar cell greenhouses
A recent study shows that lettuce can be grown in greenhouses that filter out wavelengths of light used to generate solar power, demonstrating the feasibility of using see-through solar panels in greenhouses to generate electricity. “We were a little surprised…
Glass crystallization making red phosphor for high-power warm white lighting
High-power laser diode (LD) driven solid-state lighting can generate super-high luminance far exceeding the state-of-art light-emitting diodes (LEDs) source by factors of 2-10, enabling it particularly attractive for automotive headlamp, outdoor lighting, multimedia projectors, laser TVs and so on. Whereas,…
Ultrafast intra-atom motion tracked using synchrotron radiation
Scientists in Japan have observed, and interfered with, the ultrafast motion of electron movement inside of a Xenon atom using the coherent pairs of short light waves in synchrotron radiation. Xenon, consisting of a nucleus surrounded by five nested shells…
Acoustic graphene plasmons study paves way for optoelectronic applications
The first images of mid-infrared optical waves compressed 1,000 times captured using a highly sensitive scattering-type scanning near-field optical microscope. –
Project investigates remote control of enzymes using light
The study showed that not only the composition of the material but also its geometry influenced the effect of the nanoparticles on the enzyme.
Distinguished Lehigh researcher Zakya Kafafi elected to National Academy of Engineering
Kafafi’s ‘contributions to materials technologies for organic optoelectronics’ recognized with one of the highest honors given to engineers in the United States
New imaging technology could help predict heart attacks
Preclinical testing shows intravascular imaging approach can detect unstable coronary plaque
From a window to a mirror: new material paves the way to faster computing
Research led by the Cavendish Laboratory at the University of Cambridge has identified a material that could help tackle speed and energy, the two biggest challenges for computers of the future. Research in the field of light-based computing – using…
Wider horizons for highly ordered nanohole arrays
More transition metals available to make ordered porous metallic oxide thin films
Clemson researchers’ breakthrough featured in Nature Communications
The collaborative research was published in the journal Nature Communications
Remote control for quantum emitters
Novel approach could become a asset in quantum computers and quantum simulation
New perovskite LED emits a circularly polarized glow
Light-emitting diodes (LEDs) have revolutionized the displays industry. LEDs use electric current to produce visible light without the excess heat found in traditional light bulbs, a glow called electroluminescence. This breakthrough led to the eye-popping, high-definition viewing experience we’ve come…
Use of perovskite will be a key feature of the next generation of electronic appliances
Nanomaterials of perovskite dispersed in hexane and irradiated by laser; light emission by these materials is intense thanks to resistance to surface defects
Modulation of photocarrier relaxation dynamics in two-dimensional semiconductors
Two-dimensional (2D) semiconductors can host a rich set of excitonic species because of the greatly enhanced Coulomb interactions. The excitonic states can exhibit large oscillator strengths and strong light-matter interactions, and dominate the optical properties of 2D semiconductors. In addition,…
Real-time observation of frequency Bloch oscillations with fibre loop modulation
BOs describe the periodic movement of electrons in solids to which an external static electric field is applied. However, it is challenging to measure the BOs directly in natural solids since the relaxation time of electrons is usually much shorter…
Simultaneous multicontrast OR-PAM from single laser source
Optical-resolution photoacoustic microscopy innovation enables simultaneous multicontrast imaging with shorter imaging time and improved accuracy
Researchers set new resolution record for imaging the human eye
Detailed images of photoreceptors could advance treatment and early detection for macular degeneration and other eye diseases
Capturing all of light’s data in one snapshot
$7.5 million Department of Defense project to create a ‘super camera’
AI holographic nanostructures on CMOS chips for energy-efficient security schemes
Today, machine learning based methods are of our everyday life, with millions of users every day unlocking their phones through facial recognition or passing through AI-enabled automated security checks at airports and train stations. Traditionally, the processing of information native…
Arbitrary polarization conversion dichroism metasurfaces for full Poincaré sphere polarizers
Polarization control is essential for tailoring light-matter interactions and is the foundation for many applications such as polarization imaging, nonlinear optics, data storage, and information multiplexing. A linear polarizer, which is a polarization optical element that filters a specific linear…
Information transition mechanisms of spatiotemporal metasurfaces
Spatiotemporal metasurfaces, driven by ultrafast dynamic modulations, opened up new possibilities for manipulating the harmonic modes of electromagnetic waves and generations of exotic physical phenomena, such as dispersion cancellation, Lorentz reciprocity broken, and Doppler illusions. In recent years, rapid development…
Loss induced nonreciprocity
Optical nonreciprocity, which prohibits the light field returning along the original path after passing through the optical system in one direction, is not only of vast interest to fundamental science, which brings us a deeper understanding of Lorentz reciprocity, time-reversal…
Lithium niobate crystal film for integrated photonic applications
In contemporary society, the demand for high-bandwidth optical communication, including mobile high-definition videos, autonomous vehicles, remote surgery, telepresence, and interactive 3D virtual reality gaming, is sharply increasing. The electro-optical modulator is the key component for optical fiber communication, which modulates…
An electrically charged glass display smoothly transitions between a spectrum of colors
Scientists have developed a see-through glass display with a high white light contrast ratio that smoothly transitions between a broad spectrum of colors when electrically charged. The technology, from researchers at Jilin University in Changchun, China, overcomes limitations of existing…
Producing highly efficient LEDs based on 2D perovskite films
Energy-efficient light-emitting diodes (LEDs) have been used in our everyday life for many decades. But the quest for better LEDs, offering both lower costs and brighter colours, has recently drawn scientists to a material called perovskite. A recent joint-research project…
Sonic Dirac points and the transition towards Weyl points
Recently, the three-dimensional (3D) Dirac points and 3D Dirac semimetals have attracted tremendous attention in the field of topological physics. The 3D Dirac point is a fourfold band crossing in 3D momentum space, which can be view as the degeneracy…
Delmic licenses Cryo Workflow Tools developed together with Max Planck scientists
New product to be launched in March simplifies cryo electron tomography
OFC 2021 Conference and Exhibition to host global visionaries in an interactive, all-virtual format
WASHINGTON – The premier event in telecom and data center optics–the 2021 Optical Fiber Communication Conference and Exhibition (OFC)–today announced it will convene in an interactive, all-virtual format, 06 – 11 June 2021. Considered the hub of the industry, OFC…
Combined technique using diamond probes for nanoscale imaging of magnetic vortex structure
Magnetometry exploiting color center defects in diamond probes and magneto-optic imaging found to complement each other; progress towards the creation of more effective data storage systems
Innovative flat optics will usher the next technological revolution and will touch all of us
In a new paper published in Light Science & Application , the group led by Professor Andrea Fratalocchi from Primalight Laboratory of the Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, King Abdullah University of Science and Technology (KAUST),…
A liquid crystal walks into an optical resonator: new Skoltech research helps model future optoelect
Researchers at Skoltech and their colleagues proposed a photonic device from two optical resonators with liquid crystals inside them to study optical properties of this system that can be useful for future generations of optoelectronic and spinoptronic devices. The paper…
New method could democratize deep learning-enhanced microscopy
Salk researchers teach AI to improve microscope image quality — by taking high-resolution images and artificially degrading them
Experts in biomedical research to headline all-virtual 2021 OSA Biophotonics Congress
Sandrine Lévêque-Fort, Dan Oron and R. Clay Reid to describe latest innovations in the field
New technique brings the study of molecular configuration into the microscopic domain
Researchers have developed a spectroscopic microscope to enable optical measurements of molecular conformations and orientations in biological samples. The novel measurement technique allows researchers to image biological samples at the microscopic level more quickly and accurately. The new instrument is…
Lights on for silicon photonics
The demonstration of electroluminescence at terahertz frequencies from a silicon-germanium device marks a key step towards the long-sought goal of a silicon-based laser
A biosensor for measuring extracellular hydrogen peroxide concentrations
Several processes in the human body are regulated by biochemical reactions involving hydrogen peroxide (H 2 O 2 ). Although it can act as a ‘secondary messenger’, relaying or amplifying certain signals between cells, H 2 O 2 is generally…
A better way to measure acceleration
NIST researchers rely on a light touch.
Sixth mirror casting brings Giant Magellan Telescope closer to completion
In a marvel of modern engineering that takes four years of effort, the 8.4-meter mirror is the second-to-last being made for the Giant Magellan Telescope, one of the world’s largest and most anticipated telescopes
Twistoptics—A New Way to Control Optical Nonlinearity
Columbia Engineering researchers report that they developed a new, efficient way to modulate and enhance an important type of nonlinear optical process: optical second harmonic generation—where two input photons are combined in the material to produce one photon with twice the energy—from hexagonal boron nitride through micromechanical rotation and multilayer stacking. Their work is the first to exploit the dynamically tunable symmetry of 2D materials for nonlinear optical applications.
New microcomb could help discover exoplanets and detect diseases
Tiny photonic devices could be used to find new exoplanets, monitor our health, and make the internet more energy efficient. Researchers from Chalmers University of Technology, Sweden, now present a game changing microcomb that could bring advanced applications closer to…
Terahertz waves from electrons oscillating in liquid water
Ionization of water molecules by light generates free electrons in liquid water. After generation, the so-called solvated electron is formed, a localized electron surrounded by a shell of water molecules. In the ultrafast localization process, the electron and its water…
Twistoptics–A new way to control optical nonlinearity
Researchers engineer 1st technique to exploit the tunable symmetry of 2D materials for nonlinear optical applications: laser, optical spectroscopy, imaging, and metrology systems, and next-generation optical quantum information processing and computing.
Researchers investigate imaginary part in quantum resource theory
Recently, research team led by academician GUO Guangcan from CAS Key Laboratory of Quantum Information of the University of Science and Technology of China (USTC) of CAS, has made an important progress in quantum information theory. Prof. LI Chuanfeng and…
Color blindness-correcting contact lenses
Imagine seeing the world in muted shades — gray sky, gray grass. Some people with color blindness see everything this way, though most can’t see specific colors. Tinted glasses can help, but they can’t be used to correct blurry vision.…
Heat-free optical switch would enable optical quantum computing chips
In a potential boost for quantum computing and communication, a European research collaboration reported a new method of controlling and manipulating single photons without generating heat. The solution makes it possible to integrate optical switches and single-photon detectors in a…
Mantis shrimp inspires new breed of light sensors
Inspired by the eyes of mantis shrimp, researchers have developed a new kind of optical sensor that is small enough to fit on a smartphone but is capable of hyperspectral and polarimetric imaging. “Lots of artificial intelligence (AI) programs can…