What is the difference between surface plasmon and surface plasmon polariton?

There’s no difference between plasmon and plasmon polariton. Both of them indicate the resonant excitations involving electromagnetic wave and collective electronic motions simultaneously. “surface” stresses that the excitation in many cases occurs at the interface of a metal and a dielectric.

What is surface plasmon polarization?

Surface plasmon polaritons (SPPs) are electromagnetic waves that travel along a metal–dielectric or metal–air interface, practically in the infrared or visible-frequency. They are a type of surface wave, guided along the interface in much the same way that light can be guided by an optical fiber.

How do you excite the surface of plasmon?

To excite a surface plasmon you need a component of E field acting along the surface in the same direction as the K vector, as a surface plasmon is a longitudinal excitation, therefore K.E =/= 0 (in free space, K.E = 0 as they are always perpendicular).

What is surface plasmon absorption?

SPR is an optical phenomenon that happens when an incident beam of polarized light beats a prism covered by a thin metal film. Incident light photons are absorbed by free electrons at the surface of the biochip thereby changing the surface plasmon waves.

What is difference between SPR and LSPR?

What is LSPR and how is it different from traditional SPR? Traditional SPR uses a continuous gold film, while LSPR is created through metal nanoparticles, usually silver and gold. A powerful resonance absorbance peak is produced in the visible range of light by LSPR.

What is plasma and plasmon?

As nouns the difference between plasma and plasmon is that plasma is (physics) a state of matter consisting of partially ionized gas while plasmon is (genetics) all the genetic material in an organism.

How does surface plasmon polariton work?

Surface plasmon polaritons (SPPs) are transverse magnetic (TM) polarized optical surface waves formed through the interaction of photons with free electrons at the surface of metals, typically at visible or infrared wavelengths [1].

What is surface plasmon modes?

Surface plasmons (SPs or surface plasmon polaritons: SPPs) are known as non-radiative optical modes due to plasma oscillations of free electrons resonantly excited at a metal surface and propagate along the surface with evanescent electromagnetic fields [1].

What is surface plasmon resonance in nanoparticles?

Surface plasmon resonance (SPR) is the manifestation of a resonance effect due to the interaction of conduction electrons of metal nanoparticles with incident photons. The interaction relies on the size and shape of the metal nanoparticles and on the nature and composition of the dispersion medium.

What is bulk plasmon?

Bulk plasmon is a longitudinal wave, basically oscillation of free electrons along the bulk of a metal. Because light is a transverse wave, light cannot excite a bulk plasmon.

What causes surface plasmon resonance?

Surface Plasmon Resonance is a phenomenon that occurs when polarized light hits a metal film at the interface of media with different refractive indices.

What is LSPR effect?

Localized surface-plasmon resonance (LSPR) refers to the collective oscillation of electrons at the interface of metallic structures, which could be produced through the electron-magnetic interaction of the metal with incident light of a specific wavelength (Haes and Van Duyne, 2002; McFarland and Van Duyne, 2003; …

How are surface plasmon polaritons similar to photons?

They are a type of surface wave, guided along the interface in much the same way that light can be guided by an optical fiber. SPPs are shorter in wavelength than the incident light (photons). Hence, SPPs can have tighter spatial confinement and higher local field intensity.

How is the electric field of a surface plasmon sensitive?

SPPs are very sensitive to slight perturbations within the skin depth and because of this, SPPs are often used to probe inhomogeneities of a surface. The electric field (E-field) of an SPP at the silver-air interface, at the frequency where the free-space wavelength is 370 nm. The animation shows how the E-field varies over an optical cycle.

Which is an artificial mode of surface plasmon resonance?

Artificial SPP modes can be realized in microwave and terahertz frequencies by metamaterials; these are known as spoof surface plasmons. The excitation of SPPs is frequently used in an experimental technique known as surface plasmon resonance (SPR).

How is the propagation length of a surface plasmon determined?

The intensity of the surface plasmon decays with the square of the electric field, so at a distance x, the intensity has decreased by a factor of . The propagation length is defined as the distance for the SPP intensity to decay by a factor of 1/e.