Plasmons are quantum of plasma oscillations. That means the collective oscillation of electron upon excitation by electromagnetic radiation causes conversion of photons into plasmons. Plasmons are of three types: (1) Volume plasmons or bulk plasmons (2) Surface plasmons (3) Localised surface plasmons

Surface plasmons are propagating plasmons bound to the suraface at the interface of a metal and a dielectric.

Can anyone prove me, Plasma oscillation is before interaction with EM waves, and Plasmons formed after interaction with EM waves, and Polaritons formed after coupling with EM waves.?????if its true. Please discuss it with some partcular refferences.

Thanks

https://www.youtube.com/watch?v=ow9MOZ3Eeqg please go through it it might help

Anam Ahmad

Hello Tahereh Naderishahab,

Cordial Greetings!

plasmons are collective (a discrete number) oscillations of the free electron gas density. For instance: at optical frequencies, plasmons can couple with a photon to create another quasiparticle called a plasmon polariton whereas surface plasmons are coherent demoralized electron oscillations that exist at the interface between any two materials where the real part of the dielectric function changes sign across the interface.

Best,

Anand.

Dear Tahereh Naderishahab and Anam Ahmad

Seems interesting discussion. To keep it simple and straightforward:

Plasmon: Charge density oscillation (free electrons) on any surface [electrons vibrate around their equilibrium positions at certain characteristic frequencies called plasma frequency, which depends only on the number density of electrons, electric charge, electron mass and permittivity of free space.] is called plasmon. One can look into the origin of word from plasma "the way blood plasma carries various corpuscles while a transparent liquid remains", 'Langmuir wave' etc.. (They exist independently).

Polaritons: Coupled oscillations of electromagnetic waves and oscillation of any charged particles in solids (they need coupling with radiation, not-independent).

Surface plasmon: The plasmons that are found on surface of metal (generally) are called surface plasmons (They exist independently).

Surface plasmon polaritons: When the incoming radiation is coupled with the surface plasmons the coupled oscillation can be generated only when certain Maxwell's equations are satisfied. This is achieved using prism and incidence at a particular angle in KR, RK, grating and Otto configurations etc. These coupled oscillation in the case of surface plasmons are called Surface plasmon polaritons (SPPs). In addition to SPPs, surface phonon polaritons at surfaces of ionic crystals and surface exciton polaritons at semiconductor surfaces are also well known in solid-state physics. (they need coupling with radiation, not-independent).

Moreover, there are different types of plasmons: localized, delocalized, bulk, propagating, partially propagating and combinations of these.

You may look into the following to gather more information:

Article Metal-Free, Graphene Oxide-Based Tunable Soliton and Plasmon...

Article Femtomolar Detection of Spermidine Using Au Decorated SiO2 N...

Article Superior Resonant Nanocavities Engineering on Photonic Cryst...

I also second the thoughts from Anand Kumar Singh and Sibasish Dutta as well

Good luck!