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The light absorption capability could be beneficial if it could be adapted to technologies such as solar cells.

However, the device is limited to the microwave range. Also in , transformation optics were employed to mimic a black hole of Schwarzschild form. Similar properties of photon sphere were also found numerically for the metamaterial black hole. Several reduced versions of the black hole systems were proposed for easier implementations. This has an extremely wide window for colors of light. Engineering optical space with metamaterials could be useful to reproduce an accurate laboratory model of the physical multiverse.

Optical elements lenses perform a variety of functions, ranging from image formation, to light projection or light collection. The performance of these systems is frequently limited by their optical elements, which dominate system weight and cost, and force tradeoffs between system parameters such as focal length, field of view or acceptance angle , resolution, and range. Conventional lenses are ultimately limited by geometry. Light rays undergo refraction at the surfaces of each element, but travel in straight lines within the lens.

Gradient index lenses or GRIN lenses as the name implies, are optical elements whose index of refraction varies within the lens. Control of the internal refraction allows the steering of light in curved trajectories through the lens. GRIN optics thus increase the design space to include the entire volume of the optical elements, providing the potential for dramatically reduced size, weight, element count, and assembly cost, as well as opening up new space to trade between performance parameters. There is a possibility of adding expanded deformation capabilities to the GRIN lenses.

This translates into controlled expansion, contraction, and shear for variable focus lenses or asymmetric optical variations. These capabilities have been demonstrated.

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Additionally, recent advances in transformation optics and computational power provide a unique opportunity to design, assemble and fabricate elements in order to advance the utility and availability of GRIN lenses across a wide range of optics-dependent systems, defined by needs. A possible future capability could be to further advance lens design methods and tools, which are coupled to enlarged fabrication processes.

Advanced Metamaterials

Transformation optics has potential applications for the battlefield. The versatile properties of metamaterials can be tailored to fit almost any practical need, and transformation optics shows that space for light can be bent in almost any arbitrary way. This is perceived as providing new capabilities to soldiers in the battlefield.

For battlefield scenarios benefits from metamaterials have both short term and long term impacts. For example, determining whether a cloud in the distance is harmless or an aerosol of enemy chemical or biological warfare is very difficult to assess quickly.

However, with the new metamaterials being developed, the ability exists to see things smaller than the wavelength of light — something which has yet to be achieved in the far field. Utilizing metamaterials in the creation of a new lens may allow soldiers to be able to see pathogens and viruses that are impossible to detect with any visual device. Harnessing subwavelength capabilities then allow for other advancements which appear to be beyond the battlefield. All kinds of materials could be manufactured with nano-manufacturing, which could go into electronic and optical devices from night vision goggles to distance sensors to other kinds of sensors.

Longer term views include the possibility for cloaking materials, which would provide "invisibility" by redirecting light around a cylindrical shape. From Wikipedia, the free encyclopedia. Part of a series of articles about Electromagnetism Electricity Magnetism Electrostatics.


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    金石堂網路書店-Transformation Electromagnetics and Metamaterials

    The specific problem is: This page appears to be an amalgamate of popular accounts and review articles on metamaterials and transformation optics, and lacks useful encyclopedic content. Many statements on this page are redundant, unclear, or lacking context. Some statements feature poor English grammar or style.

    Please help improve this article if you can. February Learn how and when to remove this template message. Acoustic metamaterials Chirality electromagnetism Metamaterial Metamaterial absorber Metamaterial antennas Metamaterial cloaking Negative index metamaterials Nonlinear metamaterials Photonic metamaterials Photonic crystal Seismic metamaterials Split-ring resonator Superlens Theories of cloaking Tunable metamaterials Books Metamaterials Handbook Metamaterials: Physics and Engineering Explorations. Bibcode : Sci A recently published theory has suggested that a cloak of invisibility is in principle possible, at least over a narrow frequency band.

    We describe here the first practical realization of such a cloak.

    Electrodynamics of transformation-based invisibility cloaking

    January 16, October 17, Retrieved Imperial College, London. Nature Physics. Bibcode : NatPh The associated metamaterials technology for designing and realizing optical and electromagnetic devices can control the behavior of light and electromagnetic waves in ways that have not been conventionally possible. The technique is credited with numerous novel device designs, most notably the invisibility cloaks, perfect lenses and a host of other remarkable devices. Transformation Electromagnetics and Metamaterials: Fundamental Principles and Applications presents a comprehensive treatment of the rapidly growing area of transformation electromagnetics and related metamaterial technology with contributions on the subject provided by a collection of leading experts from around the world.

    The applications encompass invisibility cloaks, gradient-index lenses in the microwave and optical regimes, negative-index superlenses for sub-wavelength resolution focusing, flat lenses that produce highly collimated beams from an embedded antenna or optical source, beam concentrators, polarization rotators and splitters, perfect electromagnetic absorbers, and many others.

    Transformation Electromagnetics and Metamaterials

    AB - Transformation electromagnetics is a systematic design technique for optical and electromagnetic devices that enables novel wave-material interaction properties. Transformation electromagnetics and metamaterials Fundamental principles and applications. Abstract Transformation electromagnetics is a systematic design technique for optical and electromagnetic devices that enables novel wave-material interaction properties.


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