Articles tagged with Photonics
A team of researchers from EPFL has found a way to harness the unique features of chaotic frequency combs to implement unambiguous and interference-immune massively parallel laser ranging. This innovative approach offers significant advantages over conventional methods, enabling hundreds of multicolor independent optical carriers.
A novel coupling mechanism involving leaky mode has been uncovered, enabling zero crosstalk between closely spaced waveguides. This discovery drastically increases the coupling length of transverse-magnetic (TM) mode, expanding the potential for dense photonic integration.
Researchers have demonstrated a new approach to photonic packaging using 3D-printed FaMLs, which can be printed with high accuracy to connect optical components. This method relaxes alignment tolerances and enables passive assembly techniques, opening an attractive path towards scalable and flexible photonic system assembly.
Researchers have successfully created photonic time crystals with fast oscillations in refractive index, faster than current theories can explain. This breakthrough has profound implications for the science of light and could enable truly disruptive applications.
Photonic snake states have been discovered, enabling two-dimensional optical rules with unprecedented versatility. This breakthrough enables the development of broadband, reconfigurable devices with real-time frequency comb generation.
Lead-free Cs3MnBr5 anti-perovskite nanocrystals embedded in glass matrices enable tunable emission and ultra-stable X-ray imaging. The results achieve exceptional X-ray detection limits, spatial resolutions, and dose irradiation stability.
The team used a photonic resonator to create a multi-dimensional lattice in the synthetic frequency dimension and measured its band structure. The researchers unveiled properties related to nontrivial eigenvalue topology, which are associated with the non-Hermitian skin effect.
The team's breakthrough enables the production of bright visible-wavelength pulses in the femtosecond range directly with fiber lasers. This advance has significant implications for various fields, including high-precision ablation of biological tissues, two-photon excitation microscopy, and material processing.
Researchers have implemented Orbital Angular Momentum (OAM) as an independent information carrier for optical holography, leading to OAM multiplexed holography. The new design approach, MHC-OAM, uses spatial light modulators to achieve multiramp helical conical beams with different parameters serving as information encryption or decryp...
Fiber sensing scientists from Shenzhen University have developed an encrypted fiber optic tag that can be used for all-optical labeling and recognition of optical transmission channels. The team proposed a method using fiber Bragg grating arrays prepared by femtosecond laser direct writing to flexibly store different coding sequences.
Researchers have figured out why some air-filled fibre designs work so much more efficiently than others. Dr Leah Murphy and Emeritus Professor David Bird from the University of Bath developed a theoretical understanding of the relationship between fibre structure and leakage loss.
Researchers at the University of Sydney have developed a photonic radar system that can accurately detect pauses in breathing patterns remotely. The system has been tested on cane toads and simulated human breathing devices, demonstrating its potential for non-invasive vital sign monitoring in clinical environments.
SUTD researchers created a CMOS-compatible, slow-light-based transmission grating device for high-speed data dispersion compensation. The devices achieved minimal loss and improved error correction performance, paving the way for on-chip integration in transceivers.
Researchers from the University of Rochester have made an important step toward developing computers advanced enough to simulate complex natural phenomena at the quantum level. They developed a new chip-scale optical quantum simulation system that could help make such a system feasible, using photonics-based synthetic dimensions.
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...
Researchers developed a compact and efficient single-photon Raman lidar system that can detect oil spills in the ocean. The system uses just 1μJ of pulse energy and can be operated up to 1km underwater, making it suitable for monitoring leaks in underwater oil pipelines.
A research team at CityU developed a multifunctional composite polymer coating with both radiative and non-radiative cooling capacity, enhancing heat dissipation in wearable electronics. The cooling interface achieved temperature drops of over 56°C, improving the performance of skin electronic devices.
New smart pants based on fiber optic sensors can track various types of physical activities in the clinic or at home, detecting signs of distress. The sensing approach achieved 100% accuracy in classifying activities and has several advantages, including low-cost and reliability.
Researchers have developed a method to stabilize the –1 state of boron vacancy defects in hBN, enabling it to replace diamond as a material for quantum sensing and quantum information processing. The team discovered unique properties of hBN and characterized its material, opening up new avenues for study.
The researchers have demonstrated significant improvements for chip-based sensing devices that can detect or analyze substances across widely varying concentrations. They developed signal-processing techniques that enable seamless fluorescence detection of a mixture of nanobeads in concentrations across eight orders of magnitude.
Researchers have developed a groundbreaking photonic integrated circuit chip that combines light source, modulator, photodiode, waveguide, and Y-branch splitter on a single substrate. The GaN-on-silicon platform reduces fabrication complexity and cost, enabling compact and high-performing devices.
A new microcomb device developed by researchers at the University of Rochester offers a promising approach to generating stable microwave signals. The device's high-speed tunability enables applications in wireless communication, imaging, atomic clocks, and more.
Researchers have successfully manufactured quantum dots with lattice-matched indium phosphide substrates, emitting in the C-band optical light. This achievement demonstrates potential for manufacturing entangled photon sources, which could be used for secure data transmission.
Researchers developed a new spectropolarimetric imaging technique called DIP-SP, which integrates a passive polarization modulator into an imaging spectrometer. This approach enables high-dimensional information capture from incomplete measurements and significantly improves image quality.
Scientists have developed a novel photonics system that can measure low-energy dynamics of complex physical phenomena with high time resolution. This breakthrough approach combines terahertz spectroscopy and real-time monitoring to facilitate discoveries in materials science.
Researchers at the University of the Witwatersrand have outlined a new optical communication protocol that exploits spatial patterns of light for multi-dimensional encoding without recognizing them. This approach results in over 50 vectorial patterns of light being sent virtually noise-free across a turbulent atmosphere.
The NEHO project aims to create ultrafast and energy-efficient information processing systems using photonics and semiconductor technology. By leveraging nonlinear photon-plasmon interactions, researchers hope to revolutionize information processing with faster, more efficient, and flexible technologies.
Researchers developed a system to transmit high-capacity terahertz-wave signals to different locations using direct terahertz-optical conversion and fiber-wireless technology, achieving 32 Gb/s capacity. The system overcomes radio communications limitations in the terahertz band, expanding communication coverage.
Optical memristors have the potential to transform high-bandwidth neuromorphic computing, machine learning hardware, and artificial intelligence. However, scalability is a significant challenge that needs to be addressed to unlock their full potential.
Researchers at USTC successfully generated cryogenic integrated quantum entangled light sources using spontaneous four-wave mixing effect, enabling scalable quantum information applications. The study also explored noise mitigation and frequency-multiplexed energy-time entangled states.
Researchers at the University of Tsukuba created a liquid droplet-based laser that remains stable under ambient conditions and can be tuned using gas convection. The development enables the creation of flexible optical communication devices with potential applications in airflow detectors and fiber-optics communications.
Researchers have developed a custom OCT setup that incorporates a vertical cavity surface emitting laser (VCSEL) diode, which could increase access to OCT imaging and help catch eye problems early. The system performed well in imaging the eye of a healthy volunteer and showed potential for use in biometric eye scanner systems.
Researchers have developed a new method for designing metasurfaces using photonic Dirac waveguides, enabling the creation of binary spin-like structures of light. This advances the field of meta-optics and opens opportunities for integrated quantum photonics and data storage systems.
A new technique developed by researchers at the University of Warsaw's Faculty of Physics allows for up to a 200-fold change in pulse duration with an efficiency of 25 percent. This enables quantum Internet links to operate up to 50 times faster, contributing to the development of superfast quantum connections.
Researchers at the University of Washington have developed a multifunctional interface between photonic integrated circuits and free space, allowing for simultaneous manipulation of multiple light beams. The device operates with high accuracy and reliability, enabling applications in quantum computing, sensing, imaging, energy, and more.
A new source-device-independent quantum random number generator (QRNG) protocol has been developed, operating securely and independently of source devices. This allows for practical applications in secure quantum information tasks, with a reported generation rate of 4 megabits per second.
A sustainable, insoluble, and chiral photonic cellulose nanocrystal patch enables calcium ion (Ca2+) sensing in sweat. The researchers developed a simple method to fabricate CNC-based hydrogels, which exhibit freeze resistance, strong adhesion, good biocompatibility, and high sensitivity to Ca2+.
Researchers have developed a quantum lidar system that uses single-photon detection to acquire high-resolution 3D images underwater. The technology has the potential to inspect underwater installations, monitor submerged archaeology sites, and enhance security applications.
A new technique called image-free single-pixel object detection (SPOD) can detect the location, size, and category of multiple objects without acquiring images. SPOD uses a small optimized structured light pattern to quickly scan the scene and extract features, achieving an accuracy of over 80%.
Researchers have developed photonic neural networks that can achieve precision comparable to conventional neural networks but with considerable energy savings. The devices use a programmable grid of silicon interferometers to perform calculations in under 0.1 nanoseconds, paving the way for faster and more efficient AI applications.
Researchers at the University of Pennsylvania School of Engineering and Applied Science have created a photonic device that provides programmable on-chip information processing without lithography. This breakthrough enables superior accuracy and flexibility for AI applications, overcoming limitations of traditional electronic systems.
Researchers demonstrate probabilistic computing's capabilities by simulating networks of stochastic nanodevices to solve specific NP problems. The simulations agree with theoretical solutions, indicating the potential for scaling up this approach.
A team from Nanjing University and Sun Yat-Sen University developed a two-facing Janus OPO scheme for generating high-efficiency, high-purity broadband LG modes with tunable topological charge. The output LG mode has a tunable wavelength between 1.5 μm and 1.6 μm, with a conversion efficiency above 15 percent.
Researchers from HKUST and CityU developed a metasurface to generate time-varying OAM beams with a time-dependent phase profile. This allows for a higher-order twist in the envelope wavefront structure, increasing capacity for applications such as dynamic particle trapping and information encryption.
Researchers developed a new thermoelectric generator that can generate electricity using heat from the sun and radiative element, providing reliable power source for outdoor sensors and wearable electronics. The device works continuously during day or night and in cloudy conditions, addressing constraints of traditional power sources.
Researchers at Leibniz University Hannover have developed an entangled quantum light source fully integrated on a chip, overcoming challenges of size, stability and reproducibility. The new development enables scalability for real-world applications like quantum processors.
A team of scientists has proposed a new structure based on silicon photonic grating arrays to generate Bessel Gaussian beams with long propagation distances, measured up to 10.24m. The compact device enables widespread applications in optical communication and micro-manipulation.
Researchers at Max Planck Institute discover that exciting electrons with strong light leads to exotic quantum effects, enabling new functions on demand. The team made an unforeseen discovery: Floquet bands form after a single optical cycle, paving the way for ultrafast electronics and tailored quantum functions.
Researchers at DTU found that conventional materials like silicon cannot prevent backscattering in photonic systems, despite attempts to create topological waveguides. The study suggests that new materials breaking time-reversal symmetry are needed to achieve protection against backscattering.
Scientists have developed BiBurst mode, which groups femtosecond laser pulses in MHz envelopes to increase ablation speed and improve throughput. The technique achieves 23 times faster ablation of silicon without compromising quality.
Researchers have developed a new way to create dynamic ultrahigh-density 3D holographic projections, overcoming two long-existing bottlenecks in current digital holographic techniques. The new method enables realistic representations of the world around us for use in virtual reality and other applications.
Researchers have developed a new way to produce and shape large, high-quality mirrors that can be rolled up during launch and then precisely reshaped after deployment. The resulting mirrors are flexible enough to be used in space telescopes, enabling larger and more sensitive telescopes to be placed in orbit.
Researchers developed a novel design for the chip using a crossbar layout, outperforming state-of-the-art photonic counterparts in terms of scalability and technical versatility. The synergy of powerful photonics with the novel crossbar architecture enables next generation neuromorphic computing engines.
A research team created bioplastic diffraction gratings from chitosan extracted from crab shells, enabling the production of portable and disposable spectrometers. The biodegradable gratings could improve sustainability in optical manufacturing and reduce seafood waste.
The new technology enables compact, low-power, fast, and energy-efficient devices for fibre-optical communications, sensors, and future quantum computers. This breakthrough could lead to advancements in applications such as 3D imaging for autonomous vehicles and photonic-assisted computing.
Researchers at the University of Sydney and the University of Basel have demonstrated the ability to manipulate and identify small numbers of interacting photons with high correlation. This achievement represents a significant step towards advancing medical imaging and quantum computing technologies.
A research team at City University of Hong Kong invented a tunable terahertz meta-device that can control the radiation direction and coverage area of THz beams. The device allows for signal delivery to specific users or detectors and has flexibility to adjust the propagating direction, as needed.
Researchers developed a self-driven lab, AlphaFlow, that uses AI to optimize complex chemical reactions and discover new materials. The system significantly reduces the time needed to develop new chemistries from months to hours.
Researchers developed a novel 3D printed nano optical security label with 33 possible combinations, utilizing higher dimensional structured light and incoherent white light illumination. This technology has the potential to revolutionize anti-counterfeiting methods and provide a powerful platform for advanced information security.
Researchers at the Universities of Jena and Central Florida have created a photon gas that exhibits behavior similar to a conventional gas, with particles moving at different speeds but maintaining a mean velocity defined by temperature. This phenomenon, known as negative temperature, can be cooled or heated, allowing for the creation ...