Articles tagged with Optical Devices
Researchers at the University of California San Diego have developed a new approach to switch magnetic states using light, which could lead to faster and more efficient data storage. By shaping and shrinking light, they were able to overcome limitations of previous methods and achieve optical switching in thicker magnetic materials.
Researchers have successfully adapted a commercial camera to measure solar cell efficiency using electroluminescence imaging. The modified camera, with a long-pass filter, provides accurate luminescent quantum efficiency measurements, enabling cost-effective analysis of solar cell quality.
A new hierarchical path planning method optimizes internal and external parameters of Dynamic Movement Primitives to ensure precise assembly and safe obstacle avoidance. The method achieves minimum obstacle clearance of 0.078m and 0.018m in static and dynamic scenarios, respectively.
Researchers have developed a computational framework to design and fabricate crisscross DNA megastructures, expanding accessibility to DNA nanotechnology. This breakthrough enables the construction of complex structures with precise control, opening up new avenues for applications in fields like optics, immunology, and tissue engineering.
A study investigated the effects of space exposure on intraocular lenses and surgical equipment, finding that most lenses showed no notable damage after a six-month orbital journey. The research aims to develop better packaging, shielding, and material selection strategies for space missions, as the cost of sending equipment to space i...
Researchers developed nanostructures using MoOCl2, exhibiting polarization-controlled metal and dielectric resonances, with dielectric resonance exhibiting a higher quality factor and stronger photoemission signal
Researchers developed a new approach to multi-camera identity tracking by combining camera geometry and visual appearance. The method achieved high IDF1 scores on benchmarks, demonstrating improved tracking continuity across different environments, but highlighted limitations in detecting people in severe occlusion.
Researchers at DTU Electro have developed a method to double the usable wavelength range of ultra-low-noise supercontinuum lasers in a single fiber. This breakthrough enables stable broadband light with exceptionally low noise, benefiting medical imaging, gas sensing, and spectroscopy. The new source spans from 0.86 to 2.90 micrometers...
Researchers designed a compact, optically addressed programmable metasurface using VO2-based phase change materials. The device enables pixel-level independent encoding and dynamic generation of THz wavefronts for various applications including zoom meta-lensing, vortex beams, and holography.
Researchers at University of Witwatersrand have discovered that quantum information can be kept intact even when transmitted through turbulent environments. This breakthrough enables the use of twisted light to create high-capacity communication networks and ultra-resilient quantum computers.
Researchers at Adelaide University developed a laser-based technology to detect toxic methanol in sealed spirit bottles, even through colored glass. The system uses Raman spectroscopy to identify the unique chemical 'fingerprint' of a liquid through its packaging.
Researchers at MIT have developed a microscopic pixel-based tunable lens that controls incoming infrared light for more precise thermal imaging, chemical sensing, or pollution monitoring. The system enables compact, dynamic infrared cameras with potential applications in environmental protection, space research, and military technology.
Researchers developed gallium-doped zinc oxide nanosheets that can detect red, green, and blue light while remaining nearly transparent. These nanosheets enabled the detection of full-color images with half the error of conventional cameras, making them suitable for demanding environments like space hardware and automotive systems.
Researchers have developed a tiny, electrically tunable infrared filter that can distinguish between different materials and gases based on their spectral 'fingerprints'. This technology has the potential to enable handheld pollution detectors, compact multispectral cameras, and next-generation chemical sensing devices.
A research team at Pohang University of Science & Technology has developed a next-generation semiconductor with enhanced performance and stability. The breakthrough solution, called 'Volatile Surface Reconstruction,' converts unreacted tin ions into a volatile compound that volatilizes, while creating a self-protective layer to shield ...
Professor Robert Thomson will receive the prestigious Princess Royal Silver Medal for his groundbreaking work in photonics, particularly in developing an integrated photonic lantern that can be mass-produced. This technology has numerous applications, including astronomy, advanced medical sensing, and telecommunications.
A pilot study found that an examiner-worn, neck-mounted camera can supplement the observation and review of clinical skills during OSCE assessments. The results showed moderate to strong agreement between live and video-based assessments, with the wearable camera enabling more observations to be evaluated than the fixed camera.
Researchers developed a non-contact optical sensing strategy to detect ethanol molecules in air using light-field distortions and deep learning. The system employs a graphene-based Fresnel lens to focus light through interference, capturing minute changes in the focal spot formed by the lens.
Researchers have developed a soft, custom-molded acoustic contact lens that actively corrects outgoing sound waves before they pass through an autonomous drone's protective shell. The lens boosts sonar signal strength by up to 10 decibels while cutting background reverberation without draining extra battery power.
Researchers created a microscopic, nonlinear light source that can be switched on, off or tuned to a particular intensity by an electrical 'knob'. The device is just 200 nanometers wide and has a controllable active area of two-to-six nanometers, enabling faster and more efficient optical switching.
Engineers at UC San Diego developed an optical device that reveals hidden images and changes colors in response to different levels of humidity. The technology has potential applications in anti-counterfeiting labels, secure data storage, interactive displays, and environmental sensors.
A new framework combines a custom-built training dataset with transfer learning to improve the detection accuracy of small and distant objects in omnidirectional videos. The proposed model achieved an overall accuracy of 90%, significantly higher than conventional models for small moving objects.
Researchers developed a reconfigurable Ge-Si photodetector that achieves ultrahigh-speed data transmission up to 336 Gbps per wavelength using low-loss packaging. The system uses a dense network of fine metal interconnects, known as a redistribution layer (RDL), to connect components with high precision.
A team of researchers has developed a flexible neural sheet device that can record and stimulate neural activity across multiple sensory cortices in mice. The device, which is thinner than a human hair, is inserted into the epidural space to avoid brain penetration, allowing for wide-area coverage of the temporal and deep cortical areas.
Scientists at Heriot-Watt University have developed a new way to control the polarization of light, opening up new possibilities for medical tools and quantum technologies. The breakthrough achieves full control over light oscillation in real-time using only light, with no electronics or moving parts.
The Harvard-led team demonstrates a micron-scale photonic device that generates two orders of magnitude more UV light on a chip than previous approaches. By converting red light to UV light through frequency upconversion, the researchers create high-power, low-loss, compact UV sources.
The device exhibits outstanding performance across a broad optical spectrum, with high responsivity and specific detectivity. Its polarization-sensitive detection capability enables the direct deciphering of light's polarization state without external filters.
Researchers developed a new imaging technique that captures both intensity and phase changes of an object in a single measurement. This allows scientists to observe ultrafast phenomena with unprecedented detail and speed, enabling the study of materials, biological processes, and high-power laser technologies.
A research team from Tokyo University of Agriculture and Technology has developed a new type of photodetector that achieves impressive responsivity and detectivity. The device uses highly ordered superlattices to overcome the limitations of traditional quantum dot-based photodetectors.
A new laser source generates a specific type of light source called a frequency comb in the mid-infrared region, paving the way for miniaturization. The device overcomes engineering challenges to produce bright, stable, and compact frequency combs.
The study measures ultrafast electron dynamics in hydrogen molecules, observing oscillations in hole localization that depend on the delay between attosecond pulses. Entanglement occurs at the expense of electronic coherence in the remaining ion.
Researchers integrated topological photonics with nanoimprint lithography (NIL) to create a stable nanolaser. The work demonstrated type-III corner states and robustness against fabrication defects.
Researchers create a new way to generate optical frequency combs at the chip scale, utilizing robust light pulses called topological solitons. This advance promises to make frequency combs more practical and easier to use outside the laboratory.
Researchers at the University of Michigan discovered that nanoscale hotspots in OLEDs can flicker, affecting device lifespans. These hotspots can cause uneven current flow, leading to faster burnout and reduced device performance.
Engineers at Harvard create microcombs on photonic chips, enabling compact, programmable frequency combs for precision measurement and telecommunications applications. The breakthrough makes electro-optic microcombs more practical, energy efficient, and diverse.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have discovered a new way to generate ultra-precise, evenly spaced laser light combs on a photonic chip. This breakthrough could miniaturize optical platforms like spectroscopic sensors or communication systems.
The Harvard team developed a new microfabrication method to produce high-performance, curved optical mirrors with extremely smooth surfaces. The mirrors can control light at near-infrared wavelengths, enabling fast and efficient quantum networking.
Researchers have developed a long, needle-thin brain electrode with channels that enables neural signal recording and precisely targeted medication delivery across different brain regions. The technology has primarily been developed for basic research but may be important for future treatments in epilepsy and other neurological diseases.
A team at Stanford University developed a new optical cavity architecture that enables efficient collection of single photons from single atoms, paving the way for million-qubit quantum computer networks. This breakthrough could lead to significant advances in materials design, chemical synthesis, and medical research.
Researchers have successfully controlled the rotation of molecules suspended in liquid helium nano-droplets using a new optical centrifuge. This breakthrough enables scientists to study the behavior of exotic, frictionless superfluids and understand how molecules interact with the quantum environment at various rotational frequencies.
Researchers at Meijo University have developed the world's first continuous-wave UV-B semiconductor laser diode operating at room temperature on a low-cost sapphire substrate. The achievement advances compact, energy-efficient UV light sources for various applications.
A novel optical microneedle device developed by researchers can quantify glucose levels in ultra-trace samples with high precision, offering a potential solution for blood-sampling-free clinical testing. The device features a functional hydrogel at its tip that reversibly binds to glucose, enabling accurate analysis without consuming t...
Researchers at Princeton University have developed a new technique to convert low-energy light into high-energy LEDs, improving the ability to upconvert green light to blue or ultraviolet light. The method uses plasmonics to boost upconversion on a thin metal film, reducing the power needed by 19 times compared to previous setups.
Researchers introduce a novel calculation approach to achieve high-quality holographic imaging in vehicle head-up displays. The 'zoom lens' method reduces computation time by 58% and eliminates zero-padding, enabling seamless virtual and physical reality.
Scientists developed a Rydberg-atom detector to measure weak terahertz signals, enabling precise spectroscopy and quantum sensors. The detector uses a gas of rubidium atoms in a Rydberg state, tuning them to specific frequencies for calibration.
The new system can reveal early cancers, lung disease, hidden material defects and changes in porosity without multiple exposures or complex mechanical movement. This method produces low-dose and faster images, lowering patients' radiation dose and making clinical translation feasible.
Researchers at Purdue University have achieved a long-sought milestone by controlling light with light itself at the most fundamental level using single photons. The discovery could enable photonic computing and revolutionize data centers, optical communications, and data transfer systems.
A team of Korean researchers has successfully integrated a single memristor into micro-LED pixels, replacing the traditional driving transistor and storage capacitor. This innovation enables more efficient and easier-to-build displays with improved brightness and color accuracy.
Researchers propose IncepHoloRGB, a lightweight unsupervised CGH model generating high-definition RGB holograms through a unified framework. The model combines depth-traced superimposition and Inception sampling block to enhance computing efficiency and visual impression.
Aston University researcher Dr Aleksandr Donodin has received £625,000 to explore fibre-optic networks and reduce power consumption in data centers. The project aims to cut power consumption by 30–50% per bit, enabling faster data transmission rates.
Researchers at Aalto University have successfully connected a time crystal to an external system, enabling the development of highly accurate sensors and memory systems for quantum computers. This breakthrough could significantly boost the power of quantum computing by harnessing the unique properties of time crystals.
A team from the University of Warsaw developed a new type of all-optical radio receiver based on Rydberg atoms, providing extreme sensitivity and internal calibration. The antenna is powered by laser light, enabling precise control over the lasers and electron dance.
Researchers at Champalimaud Centre for the Unknown used machine learning techniques to show that mice's facial movements reflect their hidden thoughts. This discovery could offer unprecedented insight into brain function and potential new research tools.
A research team has observed chiral switching between collective steady states in a dissipative Rydberg gas, controlled by the direction of parameter change. The phenomenon is underpinned by a unique Liouvillian exceptional structure inherent to non-Hermitian physics, allowing for efficient control over the system's dynamics.
Rice scientists developed a method to pattern device functions with submicron precision directly into an ultrathin crystal using focused electron beams. The approach created bright blue-light emitting traces that also conduct electricity, potentially enabling compact on-chip wiring and built-in light sources.
Scientists have developed a method to generate pseudomagnetic fields inside photonic crystals, allowing for arbitrary control of light flow. This technique enables high-speed data transmission and opens new possibilities for optical communications and quantum technologies.
A new imaging approach has simplified retina exams by eliminating the need for mechanical focusing, making fundus cameras more accessible. The system uses a diffuser to capture 3D light information and digitally refocus images after they are taken, producing consistent resolution of about 7-10 line pairs per millimeter.
The new Harvard device can turn purely digital electronic inputs into analog optical signals at high speeds, addressing the bottleneck of computing and data interconnects. It has the potential to enable advances in microwave photonics and emerging optical computing approaches.
Using a laser-induced technique, researchers have created highly transparent and ultra-smooth 3D microphotonic devices with a record length-to-thickness ratio. The new photonic origami method enables tiny, yet complex optical devices for next-generation data processing, sensing, and experimental physics applications.
Researchers developed a non-mechanical bioimaging device that uses electrowetting to produce high-resolution images of the retina and cornea. The device has shown promise in detecting eye conditions like age-related macular degeneration and glaucoma, as well as heart disease.