Articles tagged with Metasurfaces
A team of researchers has developed a compact augmented reality (AR) display that can be integrated into eyeglasses, significantly improving image quality and field of view. The new technology combines two optical technologies to create a high-resolution AR system with minimal distortions.
The team proposes an approach for arbitrarily controlling the polarization direction and phases of reflected waves in linear and nonlinear ways using a stacked programmable metasurface. They achieved high polarization rotation ranges and demonstrated applications in imaging, data storage, and wireless communication.
Scientists create integrated metadevice that combines optical and terahertz metasurfaces, enabling 2-bit terahertz code modulation with ultrafast modulation within 1 ns. The device uses photonic crystals to control its non-radiative loss for ultrafast modulation behavior.
Researchers developed a new type of temperature-adaptive radiative cooling device with improved performance, reducing solar absorptance by 7.54% and increasing emissivity by 13.3%. This advancement holds promise for optimizing energy use and advancing sustainable thermal management solutions.
A team of international researchers has proposed a metasurface capable of efficiently modulating light polarization, achieving notable amplitude (400%) and phase (90°) variations under low-power photoexcitation. This new material enables the transient modification of optical properties in ultrafast timescales.
Researchers have developed a smart leaky-wave antenna system based on spoof surface plasmon polaritons that offers flexible control, wide frequency band and high gain. The system can automatically switch between radiation and non-radiation states and track moving targets in real-time.
The research team has successfully demonstrated the control of thermal radiation by metasurfaces, achieving circularly polarized light with full control over emission direction. This breakthrough enables the creation of custom light sources with desired spectral, polarization, and spatial features for various applications.
Researchers developed a new phase characterization method for metalenses based on multi-distance phase retrieval through optical field scanning. This innovative approach overcomes traditional interferometric techniques' limitations, enabling the measurement of phase distributions and wavefront errors with higher accuracy.
Researchers have developed a metasurface that can reflect light at multiple frequencies, enabling faster wireless communication channels. The device operates in reflection mode at optical frequencies, offering thousands of times more bandwidth than current Wi-Fi.
Researchers at the University of Melbourne have developed a compact, high-efficiency metasurface-enabled solenoid beam that can draw particles toward it. The technology has the potential to reduce pain and trauma associated with current biopsy methods.
Researchers at The University of Tokyo developed a genetic algorithm to design phononic crystals with specific vibration characteristics. The new approach uses simulations to iteratively assess proposed solutions, allowing for the creation of devices with precise control of acoustic wave propagation properties.
Researchers have developed a nonlinear metasurface that enhances second-order and third-order nonlinear optical response through guided mode resonance and bound states in the continuum. The design allows for high-intensity light-matter interaction, resulting in strong coupling between light and matter.
Scientists have developed a quasicrystal metasurface that projects holographic images and creates unique diffraction patterns. This innovative design simplifies device design and offers precise control over light manipulation, paving the way for high-resolution thin holographic displays, ultra-fast light-switching devices, and advanced...
Researchers at Pohang University of Science & Technology have created metasurfaces embedded with quantum dots, enhancing their luminescence efficiency. The study achieved up to 25 times greater luminescence efficiency compared to a simple coating of quantum dots.
A team of researchers has created a novel approach to control thermal emission by designing an interface that joins two surfaces with different geometric properties. This allows for localized thermal emissions from designated areas, enabling applications in infrared optics, sensing, and satellite technology.
Scientists developed a miniaturized micro-spectrometer to detect multiple toxic and greenhouse gases, offering increased control over individual exposure. The technology uses machine learning and metasurface spectral filter arrays to create a compact sensor that can be integrated into wearable devices.
Researchers developed a compact sensor system with infrared imaging capabilities that can be fitted to drones for remote crop monitoring. The system can rapidly switch between edge detection and detailed infrared imaging, allowing farmers to pinpoint specific crop needs and boost harvests.
Researchers at TMOS have developed a new infrared filter thinner than cling wrap, which can be integrated into everyday eyewear, allowing users to view both visible and infrared light spectra. This breakthrough miniaturizes night vision technology, opening up new applications in safety, surveillance, and biology.
A groundbreaking study introduces a method for sorting vector structured beams with spin-multiplexed diffractive metasurfaces, promising significant advancements in optical communication and quantum computing. This technology enables precise control over complex light beams, opening new avenues for scientific exploration.
Researchers have developed a new device that can determine photon pair properties in a single shot, improving precision and accuracy in quantum technologies. The metasurface-enabled multiport interferometer reduces size, weight, and power while increasing reliability.
The study found that an 80% concentration of zirconium dioxide (ZrO2) and specific solvents leads to the highest pattern transfer efficiency. The conversion efficiency reaches impressive levels in the ultraviolet spectrum, paving the way for commercial viability of metasurfaces.
Scientists at Harvard John A. Paulson School of Engineering and Applied Sciences have developed a compact, single-shot polarization imaging system that can provide a complete picture of polarization. The system uses two thin metasurfaces to capture the most complete polarization response of an object in real-time.
The integration of liquid crystals with metasurfaces enables dynamic optical control, offering functionalities like hologram, lens, beam steering, and transmissive/reflective modulation. This technology has promising applications in cutting-edge technologies.
The study developed DNA aptamer-based metasurfaces for rapid detection of SARS-CoV-2 and its variants. The approach achieved near-perfect accuracy in identifying different variants, with a sensitivity and specificity of 95.2%.
A team of researchers has successfully integrated a metasurface with photonic integrated circuits, enabling fast and tunable control over light manipulation. The device can shape any wavefront in reconfigurable arbitrary polarization states at speeds of up to 1.4 gigahertz.
The team created ten holograms with varying colors and shapes using an inverse design technique driven by artificial intelligence. They integrated an oblique helicoidal cholesterics-based wavelength modulator to accurately implement the designed holograms, enabling the establishment of an optical security system.
Researchers have developed hybrid polar dielectric metasurface thermal emitters that can selectively emit heat into space, reducing temperatures by up to 15.4°C. The technology has the potential to transform urban heat island mitigation and reduce energy consumption.
Researchers developed a multifunctional elastic metasurface that can be freely configured for practical applications. The metasurface harnesses elastic waves in piezoelectric components, increasing electricity production efficiency and overcoming limitations in theoretical analysis.
A novel liquid crystal-based tunable dielectric metasurface was developed, eliminating the need for liquid crystal alignment layer materials and processes. The study achieved a contrast ratio of 25.6 and modulation depth of 94% in the near-infrared communication wavelength band.
The researchers achieved 20-level intermediate states of phase change materials using a micron-scale laser writing system. This allows for the demonstration of ultra-high flexibility in phase modulation and potential applications in neuromorphic photonics, optical computing, and reconfigurable metasurfaces.
A team at Zhejiang University has developed a self-driving cloaked unmanned drone with an intelligent aeroamphibious invisibility cloak, capable of manipulating electromagnetic scattering in real-time across dynamic environments. The cloak integrates perception, decision-making, and execution functionalities using spatiotemporal modula...
A new method combines a tri-channel chiral metasurface with a deep convolutional neural network to analyze polarizations, achieving fast, robust, and accurate measurements. This approach supports high spatial resolution requirements and compact design, enabling diverse applications in remote sensing, astronomy, biology, and microscopy.
Researchers from Pohang University of Science & Technology developed angle-dependent holograms using metasurface technology, allowing for diverse images based on viewing angles. The holographic display demonstrates an extensive viewing angle of 70 degrees, enabling observers to perceive the three-dimensional image from various directions.
Researchers at Aalto University have developed an optical metamaterial that enables the creation of truly one-way glass, opening up new applications for industries. The metamaterial harnesses the nonreciprocal magnetoelectric effect to control light transmission in both directions.
Researchers developed a carbon-based tunable metasurface absorber with an ultrawide, tunable bandwidth in the THz range. The absorber boasts high absorption efficiency and insensitivity to polarization angles, paving the way for advanced technological applications.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences developed a 10-centimeter-diameter glass metalens that can image the sun, moon, and distant nebulae with high resolution.
A new technology uses meta-optical devices to perform thermal imaging, providing richer information about imaged objects. The approach can be used for various applications such as autonomous navigation, material identification, security, and medical imaging.
Researchers have developed a roll-to-roll polymer film for improved radiative cooling by arranging 3D trench-like structures within the thin layer of the polymer film. The novel technique achieves high cooling performance with low energy input, making it suitable for large-scale thermal management applications.
Researchers created an inexpensive and effective sound insulation panel using pingpong balls as Helmholtz resonators, capturing ambient sound waves at their natural frequency. The design allows for adjustable acoustic properties and potential applications in various functionalities.
A team of scientists creates a universal paradigm for achieving high-efficiency exceptional point (EP) in the visible using interlayer loss to control the interplay between lossy structure and scattering lightwaves. The bilayer framework demonstrates perfect retroreflection and absorption, with efficiencies of 88% and 85%, respectively.
Researchers developed a dielectric metasurface for amplifying upconversion emissions in lanthanide-doped UCNPs, showcasing ultrabright emission at dual bands. The polarization-controlled dual-band upconversion bursts demonstrate ultra-high degrees of polarization.
Researchers propose integrated metasurfaces that can be combined with standard optical components like LEDs and LCDs for commercialization. Collaboration between industry and academia is crucial for developing innovative optical platforms.
Researchers developed a water-soluble nanoimprint mold to overcome challenges in metasurface fabrication. The novel approach enables high-resolution and high aspect ratio results at an affordable cost.
A new multifunctional metalens has been developed to structure quantum emissions from solid-state single photon emitters. The metalens can simultaneously tailor directionality, polarization, and orbital angular momentum degrees of freedom, enabling the generation of high-dimensional single-photon hybrid quantum states.
Researchers have proposed an innovative solution to address limitations of lidar technology, enabling imaging in low SNR environments. The novel technique uses a high-scanning speed AOD and metasurface-enhanced scanning lidar, extending ambiguity range by up to 35 times.
Researchers have developed an intelligent metasurface design using forward and reverse algorithms, reducing computational time and improving physical accuracy. Machine learning and physics-informed neural networks are used to optimize metasurface properties and overcome limitations of traditional methods.
Researchers have developed a meta-holographic display that generates holograms in both the visible and ultraviolet spectral regions. The breakthrough overcomes previous limitations and enables applications in security technologies such as anti-counterfeiting measures.
A team of researchers developed an acoustic metasurface-based holography technique that uses a deep learning algorithm to generate and iteratively improve a hologram of the Mona Lisa. The technique successfully reconstructed the painting, with even greater detail in her left eye.
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 approach improves quality factors and robustness of symmetry-protected BICs, achieving high-quality factor resonances with enhanced light-matter interactions. The hybrid BIC lattice offers a simple and generalized method to achieve high-quality factor metasurfaces.
Researchers at Nottingham Trent University developed a thin film capable of covering all NIR frequency bands using nonlinear metasurfaces. The technology generates new colors via third harmonic generation, opening up possibilities for high-tech imaging and sensing applications.
Scientists at Columbia University create a new class of integrated photonic devices that can convert light from an optical waveguide to an arbitrary optical pattern in free space. The devices simultaneously control all four optical degrees of freedom, paving the way for applications in quantum optics, optogenetics, and holographic disp...
A team of scientists has proposed a dispersive Jones matrix method for independent phase manipulations on any desired orthogonal polarization channels at predefined discrete wavelengths. This enables the generation of achromatically focusing spots over three pairs of arbitrarily chosen orthogonal polarizations on spatially separated ch...
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.
A novel metasurface-based approach achieves dynamic dual-mode modulation of THz waves by varying the wavelength of pumping light. The device can realize mode-selective or mode-unselective modulations on incident THz waves, offering high modulation pixel resolution and ultrafast modulation speed.
A team of scientists developed a new approach to designing metasurfaces with high-accuracy functionalities using a tandem neural network and iterative algorithm. The design enables the creation of ultracompact devices with quantitative capabilities in imaging, detecting, and sensing applications.
A new paradigm in metasurface design and assembly is proposed, utilizing a knowledge-inherited neural network to inherit physical connections and network correlations among various metamaterials. The method achieves accurate designs for diverse applications, including satellite communication.
A team of researchers has demonstrated the ability to dynamically steer incoherent light pulses using a semiconductor device, paving the way for applications such as holograms, remote sensing, and self-driving cars. The technique uses metasurfaces to manipulate light waves, offering a low-power alternative to traditional laser beams.
Researchers at Sandia National Laboratories have demonstrated the ability to dynamically steer light pulses from conventional, incoherent light sources using a semiconductor device. This breakthrough has significant implications for applications such as holograms, remote sensing, and self-driving cars.
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.