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A metamaterial (from the Greek word μετά meta, meaning 'beyond' or 'after', and the Latin word materia, meaning 'matter' or 'material') is an engineered material whose properties arise not from the chemical composition of its base substances, but from their deliberately designed internal structure. These properties are often rare or absent in naturally…
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metamaterials materials electromagnetic properties negative mechanical material optical wave structures waves photonic research light index applications acoustic frequency also permittivity
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| diffraction gratings | instance of | Photonic crystals and frequency-selective surfaces | 0.80 | text |
| dielectric mirrors | instance of | Photonic crystals and frequency-selective surfaces | 0.80 | text |
| optical coatings exhibit similarities to subwavelength structured metamaterials | instance of | Photonic crystals and frequency-selective surfaces | 0.80 | text |
| photonic crystals are effective in the visible light spectrum | instance of | material structures | 0.80 | text |
| negative mass density or modulus | instance of | where resonant or periodic architectures control both longitudinal and shear wave propagation through effective properties | 0.80 | text |
| aligned fibers or carbon nanotube arrays | instance of | and directional heat management using structures | 0.80 | text |
| bulk modulus | instance of | By tailoring effective parameters | 0.80 | text |
| crushability | instance of | with the added benefit of electrical tunability.Other typesStructuralStructural metamaterials are a type of mechanical metamaterial that provide properties | 0.80 | text |
| lightweight characteristics | instance of | with the added benefit of electrical tunability.Other typesStructuralStructural metamaterials are a type of mechanical metamaterial that provide properties | 0.80 | text |
| a negative refractive index | instance of | exotic properties | 0.80 | text |
| create opportunities to tailor the phase matching conditions that must be satisfied in any nonlinear optical structure | instance of | exotic properties | 0.80 | text |
| can strongly modify the known nonlinear effects | instance of | exotic properties | 0.80 | text |
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