Articles tagged with Optical Metamaterials
Researchers at Osaka University have created a microfluidic system that can detect minute changes in the concentration of trace amounts of ethanol, glucose, or minerals in water using terahertz radiation. The device achieved sensitivity levels an order of magnitude better than existing microfluidic chips.
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 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 wearable magnetic metamaterial helmet can create better brain scans by boosting MRI performance. It fits over a person's head during a brain scan, creating crisper images that can be captured at twice the normal speed.
Hyperbolic metamaterials exhibit extremely high anisotropy, enabling unique light manipulation capabilities. Researchers have harmonized HMMs with natural materials and artificial structures, expanding their applicability to fields like super-resolution imaging and emission engineering.
Researchers at Harvard SEAS developed a new silicon coating that counters chromatic dispersion in transparent materials like glass. The ultra-thin coating uses precisely designed silicon pillars to capture and re-emitting red light, allowing slower-moving blue light to catch up.
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.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences developed a metasurface using ultra-deep holes to focus light to a single spot, achieving a record-breaking aspect ratio of nearly 30:1. This breakthrough enables the creation of large achromatic metalenses with diverse color control capabilities.
Researchers from KIT have developed photoresists that can be erased selectively, allowing specific degradation and reassembly of microstructures on the micrometer and nanometer scales. This enables complex geometries with precise filigree structures, applications in biomedicine, microelectronics, and optical metamaterials.
Researchers have devised an ultrafast tunable metamaterial based on gallium arsenide nanoparticles that can be turned on and off quickly, paving the way for ultrafast optical computers. The material consists of semiconductor nanoparticles that concentrate and interact with light efficiently.
The researchers designed nanostructured metamaterials that can control device performance across a range of frequencies. They achieved this by introducing nanonotches in the corners of the fishnet holes to create flexibility in independently controlling permittivity and permeability.
Researchers at the University of Southampton have created an artificial material that can be controlled by electric signals. This breakthrough enables the rapid manipulation of metamaterial building blocks, leading to changes in transmission and reflection characteristics.
Researchers at Iowa State University and Ames Laboratory are developing designer optical materials that can refract light in a negative angle, enabling control over light like semiconductors control electricity. These materials have the potential to create flat superlenses with superior resolution for biomedical applications.