Articles tagged with Photonics
Researchers discovered near-zero index materials where light's momentum becomes zero, altering fundamental processes like atomic recoil and Heisenberg's uncertainty principle. These materials could enable perfect cloaking and have potential applications in quantum computing and optics.
Researchers developed a light-controllable time-domain digital coding metasurface that can manipulate microwave reflection spectra by time-varying light signals. The metasurface platform produces harmonics based on phase modulation, generating symmetrical harmonics and white-noiselike spectra.
A new measurement and imaging approach resolves nanostructures smaller than the diffraction limit without dyes or labels, using polarization and angle-resolved images of transmitted light. The method measures particle size and position with high accuracy, closing the gap between conventional microscopes and super-resolution techniques.
Researchers developed new polymer materials with adjustable refractive index, enabling easy creation of optical interconnects between photonic chips and board-level circuits. The technology has the potential to boost Internet data center efficiency by reducing power consumption and heat generation.
Researchers developed a novel algorithm, 'Joint Space and Frequency Reconstruction' (JSFR-SIM), to accelerate image reconstruction in optically sectioned superresolution structured illumination microscopy. The method achieves 80 times faster execution speed without compromising image quality.
Harvard researchers have successfully integrated a high-power laser onto a lithium niobate chip, a major breakthrough in the development of high-performance chip-scale optical systems. The integration enables the creation of fully integrated spectrometers, optical remote sensing, and efficient frequency conversion for quantum networks.
Elsa Reichmanis has been selected as the recipient of the 2022 John M. Prausnitz AIChE Institute Lecturer Award for her achievements in chemical engineering, electronics, and photonics. Her research focuses on polymeric and nanostructured materials for advanced technologies.
Researchers developed a new framework to extract meaningful vectorial metrics from Mueller matrix elements, providing insights into exotic material characterization and precise cancer boundary detection. The framework establishes a universal metric for calculating different physical properties of target objects.
Researchers developed a metasurface attachment that can turn any camera into a polarization camera, capturing light's polarization at every pixel. This innovation benefits various fields like face recognition, self-driving cars and remote sensing, revealing hidden details and features.
Researchers have developed a direct method for generating complex structured light through intracavity nonlinear frequency conversion. This technique uses transverse mode locking to produce vortex beams, which are then converted into second-harmonic generation beams with distinct structural characteristics. The study demonstrates the p...
Researchers at NC State University have developed a 'self-driving lab' that uses artificial intelligence and fluidic systems to advance our understanding of metal halide perovskite nanocrystals. The technology can autonomously dope MHP nanocrystals, adding manganese atoms on demand, allowing for faster control over properties.
Researchers have demonstrated control of graphene's relaxation time, allowing for novel functionalities in devices such as light detectors and modulators. This work paves the way for the development of ultrafast optical devices with potential applications in photonics and telecommunications.
Researchers developed a new technique called dual-detection impulsive vibrational spectroscopy (DIVS) to measure two distinct types of vibrational signals. DIVS enables synchronous measurement of THz- and fingerprint region vibrations, offering high temporal resolution for real-time chemical analysis.
Researchers at MIT have improved the efficiency of scintillators by up to tenfold and potentially even a hundredfold by creating nanoscale configurations. This could lead to better medical diagnostic X-rays, reduced dose exposure, and improved image quality.
Researchers developed a new deep learning algorithm that allows for real-time reconstruction of images combining optical and magnetic resonance imaging data. The algorithm, Z-Net, enables faster image generation and can be trained with simulated data, improving breast cancer detection.
Scientists have developed a metasurface lens with tunable focus using a piezoelectric thin film, enabling compact and lightweight optics. The new technology could be used in various applications such as portable medical diagnostic instruments, drone-based 3D mapping, and miniaturized cameras.
Researchers at the University of Nottingham have developed a groundbreaking technology to measure the microscopic elasticity of materials. By analyzing the speed of sound across the material's surface, they can reveal the orientation and inherent stiffness of small crystals, which is essential for material performance.
Researchers have discovered that altering the interface between two materials in time can lead to new opportunities for wave manipulation. This breakthrough enables novel concepts and applications in photonics, including nonreciprocal gain, power steering, and optical drag.
A new review introduces methods of photonic matrix multiplication, which offers great potential for photonic acceleration in AI applications. The technology has advantages in signal rate, latency, power consumption, and computing density over electrical computing.
A mechanical RIS has been developed with high reconfiguration degree of freedom, low power consumption, and real-time dynamic control capabilities. It uses a robust control method to determine the rotation angle of each meta-atom and offers a new energy-saving and environmentally friendly alternative for wireless communications systems.
A €16 million project, PhotonQ, is developing a photonic quantum processor to process qubits and reduce error rates. The processor will enable rapid scaling to relevant qubit numbers for practical applications.
Scientists have developed a way to create synthetic dimensions using light, allowing for more degrees of freedom in manipulating properties. The breakthrough enables the fabrication of compact devices with reduced complexity, opening up new possibilities for advanced technologies.
The researchers developed an eye-like adaptive liquid lens that can be used to diverge or converge light by changing the shape of the DBA liquid. The lens exhibits high optical performance with good stability and can be used in various applications such as mobile phone cameras, endoscopes, and machine vision.
Researchers developed a multifunctional microfiber probe for real-time monitoring of cellular molecules and changes in cell morphology. The nanowire probe enabled sensitive detection of refractive index distribution in single living cells during apoptosis.
Physicists at the University of Bath and Michigan discover a new photonic effect in semiconducting nanohelices, accelerating drug discovery and development. The effect enables chirality measurement in tiny volumes, potentially revolutionizing high-throughput screening for life-saving medicines.
A new method combines computational ghost imaging and x-ray fluorescence to create high-resolution chemical element maps. This approach eliminates lenses, reducing scanning time and improving spatial resolution, making it useful for biomedicine, materials science, art analysis, and industrial inspection.
A novel, simple, and extremely compact terahertz radiation source has been developed at TU Wien, enabling high intensities and small size. The technology uses resonant-tunnelling diodes and can be used in various applications such as material testing, airport security control, radio astronomy, and chemical sensors.
Research reveals organic aggregates can emit polychromic and white light with high efficiency, opening up new avenues for OLEDs and encryption. However, more work is needed to fully understand the underlying mechanisms and improve performance.
MIT physicists detected a hybrid particle composed of an electron and phonon, with a bond 10 times stronger than known hybrids. The discovery could enable scientists to manipulate material properties through dual control, leading to new magnetic semiconductors and ultra-efficient electronics.
Researchers outline potential and challenges of integrated photonic circuits for quantum technologies, highlighting need for investment in education and infrastructure. The paper provides a comprehensive overview of current state and future applications of integrated photonics for quantum technologies.
Researchers at TU Delft and UNICAMP successfully teleported the quantum state of a single photon to an optomechanical device containing billions of atoms. This achievement paves the way for creating signal repeaters in a future quantum internet, enabling long-distance quantum communication.
A magnetic field can be used to switch nanolasers on and off, leading to unprecedented robustness in signal processing. The new control mechanism may prove useful in a range of devices that make use of optical signals, particularly in topological photonics.
Scientists successfully demonstrated efficient electron beam modulation using integrated photonic microresonators, paving the way for atomic-scale imaging and coherent spectroscopy.
Aston University's Aston Institute of Photonic Technologies has received a £100,000 grant to support its research in food and agri-tech. The new equipment will enable the development of cost-effective photonic technology for quality control in food processing and manufacturing.
A team of researchers demonstrates an adaptive optimization protocol that can engineer arbitrary high-dimensional quantum states, overcoming limitations due to noise and experimental imperfections. The protocol uses measured agreement between produced and target state to tune experimental parameters.
Researchers have developed a room-temperature perovskite polariton parametric oscillator, enabling scalable and low-threshold nonlinear devices. This breakthrough offers possibilities for the development of cost-effective and integrated polaritonic devices.
Scientists at Chalmers University of Technology discovered a way to create a stable resonator using two parallel gold flakes in a salty aqueous solution. The structure can be manipulated and used as a chamber for investigating materials and their behavior, with potential applications in physics, biosensors, and nanorobotics.
Researchers at the University of Cambridge have developed a new concept for detecting infrared light by converting it into visible light, easily detectable by modern cameras. This innovation enables the detection of mid-infrared light using molecular frequency upconversion with dual-wavelength hybrid nanoantennas.
Researchers at Stanford University have proposed a new design for photonic quantum computers that can operate at room temperature and require fewer components. The proposed design uses a laser to manipulate an atom, which then modifies the state of photons via quantum teleportation, enabling the creation of complex calculations.
On-chip frequency shifters in the gigahertz range enable precise color shifting for high-speed optical communication. This innovation has significant implications for the development of quantum computers and future network infrastructure.
A clinical study found that severe COVID-19 patients exhibit impaired microvascular function, which correlates with disease severity. Non-invasive near-infrared spectroscopy monitoring may help predict disease course and select responders to novel therapies.
Scientists from UCLA develop a do-it-yourself radiative cooler using household materials, achieving moderate to large temperature drops. The design's reproducibility and low cost make it an attractive standard for research settings.
Researchers at POSTECH demonstrate experimental demonstration of negative refraction at visible frequency for the first time, achieving high-resolution images beyond diffraction limit. The study uses a vertical hyperbolic metamaterial to exhibit negative refraction in entire visible domain, overcoming limitations of conventional materi...
Researchers at the University of Rochester have developed a way to amplify interferometric signals without increasing extraneous input on an integrated photonic chip. This breakthrough enables high-precision measurements in various applications, including quantum gyroscopes.
The PERSEPHONe project aims to create a novel technological platform for photonics based on metal-halide perovskites. Early stage researchers will be trained in materials design, device development and adaptability.
Researchers have developed a superconducting silicon-photonic chip for quantum communication, enabling optimal Bell-state measurement of time-bin encoded qubits. This breakthrough enhances the key rate of secure quantum communication and removes detector side-channel attacks, significantly increasing security.
A research team led by Professor Luca Razzari at INRS has successfully generated coherent, intense visible light pulses with femtosecond duration using a simplified setup. This innovation opens up new possibilities for studying various phenomena in physics, chemistry, and biology.
Researchers have demonstrated a new technique for cross-sectional medical images without the need for tomography, enabling faster and more accurate imaging. The breakthrough is made possible by ultrafast photon detectors that can precisely determine the arrival times of photons, allowing for reconstruction-free positron emission imaging.
Researchers developed a novel spintronic-metasurface terahertz emitter that generates broadband, circularly polarized, and coherent terahertz waves. The design offers flexible manipulation of the polarization state and helicity with magnetic fields, enabling efficient generation and control of chiral terahertz waves.
Researchers discovered a novel topological edge soliton that inherits topological protection from its linear counterpart, enabling robust and localized light beams. This breakthrough is achieved through nonlinear photorefractive lattices harnessing the valley Hall effect, without requiring an external magnetic field.
Optical coherence tomography (OCT) has significant growth potential across various medical applications, including cardiology and dermatology. Miniaturized OCT systems are expected to revolutionize healthcare with compact, mobile, and cost-effective devices.
Scientists have designed a compact photonic circuit that uses sound waves to control light, outperforming previous alternatives and optimizing compatibility with atom-based sensors. The new device is simple in design, uses common optical materials, and can be adapted for different wavelengths of light.
A team of researchers at EPFL and Purdue University has developed a magnetic-free optical isolator using integrated photonics and micro-electromechanical systems. This device can couple to and deflect light propagating in a waveguide, mimicking the effects of magnet-driven isolators without requiring magnetic fields.
Researchers have demonstrated ultrafast optical circuit switching for datacenters using integrated soliton microcombs, which can handle increasing bursty datacenter applications while reducing overheads. The proposed architecture employs a central comb system to improve power efficiency and reduce complexity.
The INRS team has developed an intelligent optical chip that uses autonomous learning approaches to generate optical waveforms, paving the way for further advances in telecommunications. The device can autonomously adjust to a user-defined target waveform with strikingly low technical and computational requirements.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have developed a simple spatial light modulator made from gold electrodes covered by a thin film of electro-optical material. This device can control light intensity and pixel by pixel, enabling compact, high-speed, and precise optical devices.
Experts successfully connect quantum computers and sensors on a practical scale, enabling entanglement-based quantum communications. The team demonstrated scalability of entanglement-based protocols across three remote nodes using flexible grid bandwidth provisioning.
Electrical engineers at Duke University have discovered a way to extend the use of chalcogenide glasses into the visible and ultraviolet parts of the electromagnetic spectrum. By nanostructuring these materials, they can create high-order harmonic frequencies that enable transmission of light at previously inaccessible wavelengths.
A team of researchers at Bristol's Quantum Engineering and Technology Labs has developed a silicon photonic chip that can protect quantum bits from errors using photons. This breakthrough could lead to the creation of more powerful quantum computers by reducing the fragility of qubits.
A new platform enables simultaneous meeting of three critical requirements: low defect density, large dimension, and efficient light coupling with Si-waveguides. The monolithic InP/SOI platform features sub-micron wires and membranes grown using lateral aspect ratio trapping.