(Nanoelectronics _ Plasmonic) Surface Plasmon Polariton
Researcher and author: Dr. ( Afshin Rashid)
Note: Surface Plasmon Polariton is the non-diffuse excitation of conduction electrons of metal nanostructures to which an electromagnetic field is coupled. Plasmonic waves are generated using the scattering problem of a conducting nanoparticle whose dimensions are below the wavelength of a high-excitation electromagnetic field.
The interaction of a particle of size d with electromagnetic waves with excitation wavelength λ can be investigated in various analytical, semi-analytical and numerical methods. Of course, in these analyzes, it is always assumed that d≪λ, that is, the particle size is much smaller than the wavelength. The coordinated oscillation phase of an electromagnetic field at a particle volume is assumed to be constant.
The following conditions are effective in the stimulation of localized superficial plasmons and their characteristics:
Electronic properties of nanoparticles
Dimensions and shape of nanoparticles
Temperature properties of nanoparticles
_ Dielectric surrounding nanoparticles
Of course, it is important to note that as the distance from the surface of the metal nanoparticle decreases, the intensity of the electromagnetic field (specifically the intensity of the electric field) decreases exponentially. In this nanoparticle, the generated electromagnetic field is localized, compressed and improved. Slight changes in the dielectric around the nanoparticle affect the amplification of surface plasmons, so that these changes are reflected in the amount of beam scattered, the absorbed beam, or the change in wavelength. These changes can be measured using optical characteristics. The oscillations of surface electrons and the electric field around them indicate the intensification of localized surface plasmons.The name polariton was used for quasi-particles that were half-matter and half-photon, which is the coupled state between an elementary excitation beam photon and metal conduction electrons, and the term Plasmon Polariton to express the cause of a coupling between a photon and Is a plasmon.
Conclusion :
Surface Plasmon Polariton is the non-diffuse excitation of conduction electrons of metal nanostructures to which an electromagnetic field is coupled. Plasmonic waves are generated using the scattering problem of a conducting nanoparticle whose dimensions are below the wavelength of the electromagnetic field of the excitation beam.
Researcher and author: Dr. ( Afshin Rashid)
PhD in Nano-Microelectronics