Articles tagged with Metasurfaces
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences developed a single metasurface that can tune different properties of laser light, including wavelength, without additional optical components. This opens the door for lightweight and efficient optical systems for various applications.
Researchers demonstrate conversion of infrared images to visible using ultrathin and transparent semiconductor nanocrystals. The proposed metasurface-based IR imaging approach offers novel opportunities for compact night vision instruments and sensor devices.
A team of scientists has developed an efficient method to suppress meta-holographic artifacts while maintaining image quality. By fine-tuning the coherence of illumination using a degenerate cavity laser, they can reduce coherent artifacts and improve the spatial resolution of holographic images.
Researchers successfully tested a reflectionless, highly refractive index metasurface made of micro-sized cut metal wires for use in terahertz waveband applications. The metasurface has a high refractive index and low reflection at 3.0 THz, enabling potential uses in 6G wireless communications and other commercial applications.
University of Rochester researchers developed a novel technology using freeform optics and metasurfaces to deliver high-quality images with socially acceptable optics. The metaform component gathers visible light rays from all directions and redirects them directly into the human eye, achieving a significant improvement in image quality.
A team of scientists has developed a single spin-decoupled metasurface that can distinguish between spatial angular moment (SAM) and orbital angular momentum (OAM) modes. The device exploits the geometric phase and dynamic phase to transform vortex beams into focusing patterns, enabling simultaneous detection of SAM and OAM.
Researchers at POSTECH developed an ultra-compact wearable gas sensor that detects toxic gases and displays a holographic alarm. The sensor uses metasurface technology to provide immediate visual notification without relying on external mechanical or electronic devices.
Scientists develop a generic approach to generate arbitrary vectorial optical fields (VOFs) using metasurfaces, offering improved efficiency and control over polarization. They experimentally demonstrate the generation of VOFs in both far-field and near-field regimes with tailored wave fronts and inhomogeneous polarization distributions.
Researchers at POSTECH have designed a metasurface that can control acoustic and elastic waves, achieving underwater stealth capability untraceable by SONAR. The technology also enables drastic alteration of wave propagation through curved plates, such as vibrations.
Recent advancements in metasurfaces for manipulating terahertz waves enable ultra-compact devices with unusual functionalities for applications such as imaging, encryption, and communications. Metasurfaces can locally control wavefronts at subwavelength resolution, making them ideal candidates for THz device miniaturization.
Researchers Adam Overvig and Andrea Alù show that strict periodicity is not required for Fano resonances, enabling novel properties in metasurfaces. They demonstrate a nonperiodic metasurface with perfect reflection and phase conjugation, opening up new applications in optics and beyond.
Researchers at the University of Ottawa have debunked the myth that metals are useless in photonics with their findings, recently published in Nature Communications. They demonstrated ultra-high-Q resonances in a metasurface comprised of metal nanoparticles embedded inside a flat glass substrate, showing metals can be useful in photonics.
Scientists have proposed an effective approach to achieve full Poincaré sphere polarizers in one step using monolayer metasurfaces with arbitrary polarization conversion dichroism. The system can generate an arbitrarily polarized beam at any position on the Poincaré sphere, making it a monolithic arbitrary polarization generator.
The article reviews progress in microstructure engineering and domain engineering of lithium niobate photonics, including photonic modulation and nonlinear photonics. High-efficiency wavelength converters using optical waveguides involve nonlinear integrated photonics.
Researchers propose two information transition mechanisms for spatiotemporal metasurfaces: group extension and independent control of multiple harmonics. These mechanisms enable accurate manipulations of electromagnetic information and open up new possibilities for multitasking and wireless communications.
A new plasmonic metasurface achieves unprecedented centimeter-scale efficiency, boosting absorption and emission of light. This design overcomes limitations of nanoscale properties, enabling practical applications in ultrafast optoelectronics devices and fluorescence-based biosensors.
The development of programmable metasurfaces at Princeton University has the potential to significantly increase data transmission rates in wireless systems. The technology uses terahertz waves to focus transmissions in specific directions, overcoming challenges such as obstacles and distance limitations. This breakthrough could enable...
Researchers from Kyushu University developed a technique that improves the resolution of fluorescence images of living cells using plasmonic metasurfaces. The metasurface, composed of self-assembled gold nanoparticles, enhances the focus of light-emitting molecules, resulting in high-resolution imaging capabilities.
Researchers have developed a new method for two-dimensional optical spatial differentiation, enabling efficient broadband imaging with high contrast. The proposed dielectric metasurface device outperforms current methods in efficiency, compactness, and power consumption.
Researchers from the University of Exeter have discovered a way to manipulate light using a synthetic Lorentz force, enabling photons to mimic charged particle dynamics. By distorting honeycomb metasurfaces, they created artificial magnetic fields that can be tuned using precision photonic devices.
A team at Tokyo University of Agriculture and Technology has developed a system to produce true holographic three-dimensional images appearing mid-air, viewable from most angles in the room. The proof of concept uses metasurface materials that can manipulate light, allowing for a genuine holographic movie.
Researchers at ITMO University have developed a metasurface that enables simultaneous power transfer at various frequencies, allowing users to charge devices from different manufacturers with different power transfer standards.
A new technology has been developed by Penn State researchers that enables better light control without requiring large materials and structures. This hybrid photonic architecture combines the best qualities of photonic integrated circuits and metasurfaces, paving the way for multifunctional devices with flexible access to free space.
Researchers developed a liquid crystal integrated metalens that can achieve both achromatic and chromatic focusing with a single device. The design overcomes the challenge of chromatic aberration, allowing for improved resolution in full-color and hyperspectral imaging.
Researchers from Chalmers University of Technology have developed a new method for making metasurfaces, which can control light and create ultra-thin camera lenses. This breakthrough could lead to significant improvements in optical technology, including portable electronics, sensors, and space satellites.
Researchers from Harvard John A. Paulson School of Engineering and Applied Sciences designed a metasurface that can continuously tune from linear to elliptical birefringence, opening up the entire space of polarization control with just one device.
Researchers from China established a general strategy to guide design of optical metasurfaces with fully controlled angular dispersions. They demonstrated the importance of near-field couplings and radiation patterns in determining these dispersions.
Researchers developed plasmonic metasurfaces that can be tuned with polarization light, providing efficient saturable absorption for ultrafast lasers. The metasurfaces achieved stable self-starting ultrashort laser pulse generation with a modulation depth of up to 60%, outperforming previous studies.
A diffractive neural network, implemented by a compound Huygens' metasurface, realizes all seven basic optical logic operations in a compact system using a plane wave as input signal. The design strategy features flexible modification and eliminates the need for precise control of input light.
A new metamaterial has been developed by ITMO University researchers that can change its optical properties without mechanical input. The material combines silicon and phase-change materials to achieve a transparent surface in the near-infrared region.
Researchers used machine learning to enhance metasurfaces, optimizing them for nonlinear optics and optomechanics. The discovery has promising possibilities for photonic devices and applications, including optical sensing and narrowband filtering.
Researchers have demonstrated a new metasurface laser that produces 'super-chiral light' with ultra-high angular momentum, enabling control over optical communications and applications in industries like food, computer, and biomedical. The laser design allows for high power operation in a compact design.
Researchers at Los Alamos National Laboratory have developed a flat-panel reflector that can control microwave communications and beam steering electronically. This innovation promises to replace traditional 3-D antennas with compact, versatile, and adaptive designs for various applications.
Scientists have created ultra-thin optical devices known as metasurfaces integrated into off-the-shelf contact lenses to correct deuteranomaly, a form of red-green color blindness. The new customizable contact lens can restore lost color contrast and improve color perception up to a factor of 10.
Researchers have designed a new graphene-based metasurface capable of independently controlling light's amplitude and phase. This breakthrough technology has the potential to revolutionize optical devices such as holography, high-resolution imaging, and optical communication systems.
A new metasurface design enables high-directional beam forming in a wide band, with sidelobe levels below -10dB. The proposed design breaks the current bandwidth limit in transmission-type coding metasurfaces, indicating potential applications in radar and wireless communication systems.
A general information theory of metasurface has been proposed to analyze the relation between the information of metasurface and its far-field radiation pattern. The scientists found an upper bound of information contained in the radiation pattern of a metasurface, revealing theoretical upper limit of orthogonal radiation states.
Researchers create a new type of optical metasurface that imposes phase modulation on reflected light, leading to unidirectional light propagation. The metasurface enables nonreciprocal light propagation in free space with unprecedented large temporal modulation frequency.
Researchers developed an AI-driven smart metasurface for joint control of EM waves on the physical level and digital pipeline, enabling real-time imaging and recognition of multiple non-cooperative people. The intelligent EM camera can be powered by Wi-Fi signals, allowing for hands-free monitoring without visible sensors.
A research team at the University of Delaware has designed an integrated photonics platform with a one-dimensional metalens and metasurfaces, limiting information loss and enabling high signal transmission. The device demonstrates functionalities of Fourier transformation and differentiation, critical techniques in physical sciences.
Scientists have developed a new method to measure polarization using ultra-thin metasurface holograms. The technique uses overlapping holographic images to determine the amplitude contrast and phase difference between polarized light waves, enabling fast and compact devices for spectroscopy, sensing, and communications applications.
Researchers developed an ultra-thin optical chip that detects biomolecules in a sample and determines their location using metasurfaces. The technology uses image analysis to count biomolecules one by one and identify trends, demonstrating its potential for personalized medicine.
Scientists have developed new metasurfaces that can manipulate reflected light and sound waves with high efficiency. These artificial structures use periodic arrangements of meta-atoms to engineer the direction of reflected waves, breaking classical laws of reflection.
Researchers at EPFL have developed a method to create dielectric glass metasurfaces in just a few minutes, using dewetting to produce flexible and ultra-thin photonic circuits. This breakthrough enables the creation of highly sensitive sensors and flexible optics for various applications.
Aalto University scientists develop gradient metasurfaces that can appear 'bright' at one direction and 'dark' for the opposite direction, breaking conventional symmetric responses of mirrors. This innovation uses evanescent fields engineering to engineer contrast ratios in angle spectrum.
Researchers create a programmable time-domain digital coding metasurface that can respond to electromagnetic waves with strong nonlinear processes. The metasurface enables simultaneous wave-matter interactions and frequency spectrum manipulation, paving the way for simplified and compact communication systems.
Researchers at ITMO University propose a new approach to creating tractor beams using hyperbolic metasurfaces, which can capture particles and cells. The study shows that these materials have the potential for practical applications in experiments and traps.
Researchers from ITMO University and the Australian National University have discovered a new physics of high-Q resonances in asymmetric metasurfaces, governed by bound states in the continuum. This breakthrough enables the creation of thin, highly efficient sensors, lasers, and nonlinear radiation sources.
Researchers at Purdue University have developed a method to produce multiple colors simultaneously on an electronic chip, enabling broader bandwidth for sensing and processing information. This breakthrough could lead to advancements in nanophotonics, bio-sensing, and imaging applications.
Researchers have developed miniaturized infrared filters using phase change materials and metasurfaces, enabling precise measurement of mid-infrared frequencies. These tiny filters can be integrated into smartphones, allowing for real-time monitoring of air quality, food freshness, and health conditions.
Researchers developed a nonlinear elastic metasurface that can convert a soundwave's fundamental frequency to its second harmonic, advancing noise control technologies. This concept could isolate low frequencies, making it easier to absorb them, and potentially lead to new acoustic devices like diodes and transistors.
Researchers at Harvard SEAS developed a flat metalens that can resolve details smaller than a wavelength of light, generate optical vortices and holograms, and exhibit achromatic behavior in multiple colors.
Researchers created a hyperbolic metasurface using boron nitride that produces concave wavefronts with infrared light, revolutionizing the miniaturization of sensing and signal processing devices. The team overcame fabrication challenges to achieve precision structuring on the nanometer scale.
Researchers developed a device that combines metasurface lenses with MEMS technology, enabling fast scanning and beam steering. The integrated device can control the angular rotation of a flat lens and scan the focal spot by several degrees.
Researchers at Penn State have developed a new theory that uses gradient index materials and metasurface layers to improve optical lens performance. The new design reduces the need for multiple lenses, resulting in lighter and thinner optical systems.
A new metasurface-based technology has been tested on humans, providing higher signals from local brain regions and potentially reducing image acquisition time or acquiring higher resolution images. The use of metasurfaces could improve MRI comfort for patients and disease diagnosis.
A team of researchers from Harvard SEAS encoded multiple holographic images in a metasurface that can be unlocked separately with differently polarized light. This advancement offers more control over polarization manipulation and measurement, enabling applications such as anti-fraud protection and entertainment.
Researchers at UC San Diego have fabricated a semiconductor-free microelectronic device using metamaterials, showing a 1,000% increase in conductivity. The discovery paves the way for faster and more powerful devices, as well as more efficient solar panels.
Researchers at the University of Bristol have developed a new generation of high-efficiency solar thermal absorbers using a tri-layer metasurface absorber. The system uses amorphous carbon as an interlayer between thin gold films, strongly absorbing light across the solar spectrum while minimizing emission of thermal radiation.
Researchers at CNRS and University of Lorraine develop a coiled-up acoustic metasurface that achieves total acoustic absorption in very low-frequency ranges. The absorber's deep-subwavelength thickness enables it to handle large wavelengths with reduced size structure, making it physically practical for most applications.