_ Department of nanoelectronics and (plasmonic waves)
Investigating non-diffusive excitation of nano conduction band electrons
Researcher and author: Dr. ( Afshin Rashid)
Note: The interaction of a particle with size d with electromagnetic waves with excitation wavelength λ can be investigated by different analytical, semi-analytical and numerical methods. Of course, in these analyses, the assumption is always considered that d≪λ, that is, the dimensions of the particle are much smaller than the wavelength. The coordinated oscillation phase of the electromagnetic field is assumed to be constant in the particle volume.
Of course, it is important to mention that when moving away from the surface of the metal nanoparticle, the intensity of the electromagnetic field (specifically, the intensity of the electric field) decreases exponentially. In this nano volume created, the electromagnetic field is localized, compressed and improved. Small changes in the dielectric around the nano volume affect the resonance of surface plasmons, so that these changes show themselves in the amount of scattered light, absorbed light or change in its wavelength. These changes can be measured using optical characteristics. It shows the oscillation of surface electrons and the electric field around them in the resonance 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 a photon of the elementary excitation beam and the conduction electrons of the metal, and the term plasmon polariton (Plasmon Polariton) was used to express the cause of the coupling between a photon and is a plasmon.
Surface Plasmon Polariton (Surface Plasmon Polariton) is the non-emissive excitation of conduction band electrons of metal nanostructures to which an electromagnetic field is coupled. Plasmonic waves are generated by using the scattering problem from a conductive nanoparticle whose dimensions are below the wavelength of the electromagnetic field of radiation excitation.
Conclusion :
The interaction of a particle with size d with electromagnetic waves with excitation wavelength λ can be investigated by different analytical, semi-analytical and numerical methods. Of course, in these analyses, the assumption is always considered that d≪λ, that is, the dimensions of the particle are much smaller than the wavelength. The coordinated oscillation phase of the electromagnetic field is assumed to be constant in the particle volume.
Researcher and author: Dr. ( Afshin Rashid)
Specialized doctorate in nano-microelectronics