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.
A new perspective highlights emerging household contaminants that may increase the risk of heart disease, cancer, and developmental problems. The authors emphasize the need for systematic monitoring and research to inform next-generation indoor air standards.
Researchers at UCR have discovered a way to break salt-water bonds using high-frequency ultraviolet light, offering a non-photothermal alternative to traditional solar desalination systems. The breakthrough could reduce the need for energy-intensive saltwater treatment and address concentrated brine waste.
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.
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.
Researchers at Heriot-Watt University discovered a way to manipulate the optical properties of light by adding a new dimension—time. This breakthrough enables extraordinary light transformations, including amplification and quantum states, with ultra-fast pulses of light.
Researchers developed a new 2D quantum sensing chip using hexagonal boron nitride that can simultaneously detect temperature anomalies and magnetic fields in any direction. The chip is significantly thinner than current quantum technology for magnetometry, enabling cheaper and more versatile sensors.
Scientists have developed a new chip that can transfer different optical states to switch light flows using supersymmetry. The approach enables broadband continuous transformation of light spatial characteristics, opening up avenues for advanced photonic functionalities.
Researchers at Rice University have created a 'metalens' that transforms long-wave UV-A into a focused output of vacuum UV radiation. The technology uses nanophotonics to impart a phase shift on incoming light, redirecting it and generating VUV without the need for specialized equipment.
Researchers have achieved triple-wave cloaking for both sound and light using computational inverse design method. This breakthrough expands the functionality of biphysical cloaks, enabling a wider range of materials to be used, including those beyond traditional metals.
Researchers have discovered a new material, α-MoO3, that can be used to create invisibility concentrators with improved performance and lower production costs. The study suggests the use of α-MoO3 to control energy flow and scatter light, enabling the creation of devices with near-perfect invisibility.
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.
Researchers at Chalmers University of Technology have designed a material that manipulates the Cherenkov cone to distinguish between common and rare particles. The material uses transformation optics to create distinct light cones for particles with high momentum, making it possible to efficiently separate and identify these particles.
A team of researchers in China has created a new artificial surface that can bend and focus electromagnetic waves like an antenna. The breakthrough, described as the first broadband transformation optics metasurface lens, may lead to flat or ultra-low profile antennas.
Transformation optics tackles challenges in plasmonic devices by transforming complex structures into canonical ones, facilitating accurate modeling and design. This enables the development of efficient light-harvesting nanostructures with strong near-field enhancements.
The article reviews alternative target-oriented invisibility strategy, referred to as an 'inverse design', which integrates the technical advantages of forward strategies. This approach uses anisotropic materials and non-superluminal propagation to provide cloaking performance with a relatively broad bandwidth.
Researchers have developed a 'thermal' approach to invisibility cloaking that isolates or cloaks objects from sources of heat. The method uses transformation optics to control thermal diffusion, allowing for the shielding of areas from heat and the concentration of heat in small volumes.
Researchers developed a 3D invisibility cloak that guides light waves around an object, making it invisible to the human eye. The cloaking material is structured in the nanometer range and has precisely defined thicknesses, enabling it to manipulate light waves with unprecedented precision.
GRIN plasmonics combines transformation optics and plasmonics to control strongly confined light waves. The technique uses an isotropic dielectric material on a metal substrate to create efficient plasmonic devices, including Luneburg and Eaton lenses.
Researchers from Berkeley Lab and UC Berkeley have developed a novel approach to transformation optics, allowing for the manipulation of near-field optical waves on uneven surfaces. This breakthrough enables the design of plasmonic devices such as beam splitters, shifters, and directional light emitters.
The new field of transformation optics harnesses nanotechnology and metamaterials to manipulate and control light at all scales. Researchers envision applications such as electromagnetic cloaks, ultra-powerful microscopes, and faster computers that use light instead of electronic signals.