metamaterial

(redirected from Negative refraction)

met·a·ma·te·rial

 (mĕt′ə-mə-tîr′ē-əl)
n.
A usually artificial material that exhibits special properties not normally found in nature, such as a negative index of refraction, in its interaction with electromagnetic radiation, sound, or other wave phenomena. Such properties are a consequence of the metamaterial's structure at the microscopic or macroscopic level, rather than of the underlying properties of its components.

metamaterial

(ˌmɛtəməˈtɪərɪəl)
n
(General Physics) any artificial material created from microscopic arrangements of existing elements in a structure which gives the material unconventional properties, esp when used for cloaking light or sound waves
References in periodicals archive ?
Such media have special microstructures, designed to provide overall (dynamic) material properties that natural materials can never hope to attain and lead to the seemingly rather strange notions of negative refraction, wave redirection, the holy grail of cloaking.
Unique properties of HM can lead to a wide variety of applications; among these are negative refraction [10, 11], subwavelength imaging [12-17], spontaneous and thermal emission engineering [18-21], and broadband light trapping [22, 23].
Pendry, "Negative refraction makes a perfect lens," Physical Review Letters, vol.
There exist abnormal negative refraction effect [16], inverse Cerenkov radiation, reverse Doppler effect [17], and negative radiation pressure [18] in NIMs because the electromagnetic wave group velocity and phase velocity of these materials are oriented in the opposite direction; based on these principles, optical film contained NIMs has broad application prospects in microwave communication, large capacity storage medium, and superresolution imaging.
Revolutionary devices that can get around the diffraction limit include so-called superlenses made from metamaterials with negative refraction indices that bend light in an opposite sense to conventional materials.
Vaselago had introduced the concept of negative refractive index materials (left handed materials (LHM)) in 1968 [1] which exhibits a negative refractive index due to the simultaneous negative permeability and permittivity and these materials have electromagnetic properties such as negative refraction, reversed Doppler shift and reversed Cerenkov radiation.
It was stated through theoretical and experimental results that anisotropic chiral media can have a negative refraction index like isotropic media with both negative permittivity and permeability.
Forester, "Negative refraction and focusing of circularly polarized waves in optically active media," Physical Review Letters, vol.
Veselago in detail studied the interesting property of negative refraction in left handed materials [16].
The results can be utilized for realization of a helical array metamaterial which has demonstrated the negative refraction phenomenon [9,26-28].
This edition has been updated with new examples, exercises, and sections on optical control of spin, quantum dots, diamond NV centers, carbon nanostructures, negative refraction, and plasmonics.
Full browser ?