What is a plasmonic material?
A plasmonic material is a material that exploits surface plasmon resonance effects to achieve optical properties not seen in nature. This surface plasmon resonance originates from the interaction of light with metal-dielectric materials, through a collective oscillation of free electrons.
What is hyperbolic material?
A hyperbolic material (HM) is an optical material that exhibits a unique property of having anisotropy with simultaneously different signs of the permittivity tensor components. Such a property leads to novel optical phenomena.
What are plasmonic Metasurfaces?
So-called plasmonic metasurfaces are 2D arrays of such optical nanoantennas, distributed on a substrate to provide properties beyond the mere average response of the materials they are made from.
What is plasmonic effect?
The plasmonic effect is the interaction between free electrons in metal nano particles and incident light.
Why is gold a good plasmonic material?
Metals as candidates for plasmonics As discussed in Section 2, metals are candidates for plasmonic applications because of their high conductivity. Among metals, silver and gold are the two most often used for plasmonic applications due to their relatively low loss in the visible and NIR ranges.
What types of nanomaterials display plasmonic properties?
Gold and silver nanoparticles are the most commonly used plasmonic nanoparticles as they absorb and scatter light in the 350–900 nm spectral range. For example, solid silver spheres exhibit a resonance in the blue, shifting to longer wavelengths as the diameter increases.
How are metamaterials used?
Metamaterials are composite media that can be engineered to exhibit unique electromagnetic properties. Made up from subwavelength building blocks (most often based on metals), these metamaterials allow for extreme control over optical fields, enabling effects such as negative refraction to be realized.
Who discovered metamaterial?
Metamaterial inventor Sir John Pendry awarded the Julius Springer Prize for Applied Physics 2013.
Why are Ag and Au good metals for plasmonic materials?
What are plasmonic sensors?
Herein the phrase “plasmonic sensor” refers to sensors that directly utilize shifts in the spectral properties of the plasmon to act as the transducer of the sensing signal. Plasmonic sensors are constructed either with 2D chips that support a SPP mode or with nanoparticles that support LSPR, as mentioned in Section 2.
What does plasmonic mean?
(plăz′mŏn′) 1. The aggregate of cytoplasmic or extranuclear genetic material in an organism. 2. A quantum of collective electron oscillation in a metal, considered as a quasiparticle and analogous to the oscillations of a plasma consisting of stationary positive ions and a gas of electrons.
What are plasmonic nanoparticles used for?
Plasmonic nanoparticles are extremely strong absorbers and scatters of light and are used in lateral flow diagnostics, surface enhanced spectroscopy, labeling, and color changing sensors.
What are plasmonic materials?
Plasmonic materials are metals or metal-like materials that exhibit negative real permittivity. Most common plasmonic materials are gold and silver.
How can plasmonic metamaterials enhance nonlinearity?
Plasmonic metamaterials also provide an opportunity to develop a new approach to enhancing nonlinearity that utilizes the so-called nonlocal effects arising in the epsilon-near-zero regime [11.49,11.50]. The nonlocal effects depend strongly on the losses in the system and by controlling loss in Au nanorods can be significantly modified.
What happens when light hits a metamaterial?
Light hitting such a metamaterial is transformed into surface plasmon polaritons, which are shorter in wavelength than the incident light. Plasmonic materials are metals or metal-like materials that exhibit negative real permittivity. Most common plasmonic materials are gold and silver.
What determines the optical properties of metamaterials?
Optical properties of metamaterials are determined by plasmonic resonances of the constituents, e.g., split-ring resonators or nanorods, as well as the electromagnetic coupling between them [11.46].