What is Metamaterial: Definition and 15 Discussions

A metamaterial (from the Greek word μετά meta, meaning "beyond" and the Latin word materia, meaning "matter" or "material") is any material engineered to have a property that is not found in naturally occurring materials. They are made from assemblies of multiple elements fashioned from composite materials such as metals and plastics. The materials are usually arranged in repeating patterns, at scales that are smaller than the wavelengths of the phenomena they influence. Metamaterials derive their properties not from the properties of the base materials, but from their newly designed structures. Their precise shape, geometry, size, orientation and arrangement gives them their smart properties capable of manipulating electromagnetic waves: by blocking, absorbing, enhancing, or bending waves, to achieve benefits that go beyond what is possible with conventional materials.
Appropriately designed metamaterials can affect waves of electromagnetic radiation or sound in a manner not observed in bulk materials. Those that exhibit a negative index of refraction for particular wavelengths have been the focus of a large amount of research. These materials are known as negative-index metamaterials.
Potential applications of metamaterials are diverse and include optical filters, medical devices, remote aerospace applications, sensor detection and infrastructure monitoring, smart solar power management, crowd control, radomes, high-frequency battlefield communication and lenses for high-gain antennas, improving ultrasonic sensors, and even shielding structures from earthquakes. Metamaterials offer the potential to create superlenses. Such a lens could allow imaging below the diffraction limit that is the minimum resolution that can be achieved by conventional glass lenses. A form of 'invisibility' was demonstrated using gradient-index materials. Acoustic and seismic metamaterials are also research areas.Metamaterial research is interdisciplinary and involves such fields as electrical engineering, electromagnetics, classical optics, solid state physics, microwave and antenna engineering, optoelectronics, material sciences, nanoscience and semiconductor engineering.

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  1. J

    I Is photon energy negative in a negative-index metamaterial?

    Negative-index metamaterials are engineered to have a negative relative electric permittivity ##\epsilon_r## and negative relative magnetic permeability ##\mu_r## so that the index of refraction ##n## is negative: $$n=-\sqrt{\epsilon_r\mu_r}.$$ The dispersion relation for photons travelling in a...
  2. qnach

    I Nanoantennae calculation for covid-19

    Could anyone calculate the resonance frequencies of this molecule? The radius is about 50-200nm.
  3. Andre Teixeira

    I How to obtain the resonance frequencies of a given material?

    The frequency of plasma already achieved ... in a study, is presented the resonance frequency in eV, how to obtain in Hz? Wo = 7eV
  4. physics_hp

    Photonic crystals as metamaterials

    Why do some photonic crystals show metamaterial property?
  5. A

    How optical axis is related to dielectric tensor?

    I want to know the relationship between the optical axis direction of a crystal and the dielectric constants in different directions in an anisotropic material.
  6. ElPimiento

    Studying Courses/Books Recommended for Metamaterial Research?

    I'm a first year student in college and I've started shadowing under a grad student, who's in a nano-optics research group (http://www.nanoscience.ucf.edu/chanda/), in order to learn about microfabrication. I'd like to start conducting my own research soon; however, i don't know exactly what it...
  7. H

    Relative permittivity/permeability for metamaterial

    Hi Guys, Don't know if I posted at the right place... can anyone tell me how to calculate the relative permittivity/permeability of a 3D microwave metamaterial for Q-band (wavelength ranging from 6mm to 9mm)?
  8. G

    Is Manipulating the Stefan-Boltzmann Law with Metamaterials Possible?

    So I saw some papers on arXiv that explore the notion of playing around with the Stefan-Boltzmann law using metamaterials: http://arxiv.org/abs/1109.5444 http://arxiv.org/abs/1411.1360 I know enough physics that it looks rather interesting, but I don't know enough math to judge how credible it...
  9. G

    Molecules With Radio Emission Under Current

    I am working on a project, however I am having trouble finding the right material for it to work. I am looking for a nano-material or any molecule that will emit a radio frequency when subjected to a voltage or a current at around 37 degrees Celsius. I would really appreciate it if someone could...
  10. JasonGodbout

    Can Metamaterials Be Used to Reduce Shockwaves in Supersonic Flight?

    Could we use something like carpet cloaking to reduce shockwave in supersonic or mach wave in transonic flight? Student in mechanical engineering
  11. A

    Are Metamaterials the Key to Developing Cloaking Devices?

    Any decent links or papers about cloaking devices using negative refractive index metamaterials?
  12. L

    Did anyone done parameter extraction of metamaterial

    Hi I am trying to extract the parameters of the SRR metamaterial. i got very good result for the Permeability but not getting good enough rersult for permittivity , impedance and refractive index. is there anyone who is doing the same thing . we can exchange our code and help correcting each...
  13. S

    Split ring resonator SRR of Metamaterial

    how to calculate induced emf in split ring resonator SRR of Metamaterial. what are the values of inductance capacitance & resistance of SRR
  14. A

    Permittivity and permeability of ErAs, SI or any metamaterial

    hi..i'm an undergraduate student.i'm working on my final year project. I've been looking for the permittivity and permeability of ErAs, SI or any metamaterial but i find it difficult to get. i hope this forum could help me (n hope this forum is still active..hehe) THANX! o:)
  15. Ivan Seeking

    Metamaterial Electromagnetic Cloak at Microwave Frequencies

    If you happen to see microwaves... Scientists Take Step Toward Invisibility http://www.nytimes.com/2006/10/20/science/20cloak.html?hp&ex=1161316800&en=cd2cdec26f18ae3a&ei=5094&partner=homepage See also: http://www.ee.duke.edu/~drsmith/cloaking.html