ELL819 : Introduction to Plasmonics
Kushal Shah

Slot : B
Room :

Surface Plasmons (SP) are coherent electromagnetic oscillations that exist at the interface between a dielectric and a metal. These plasmons can propagate along such an interface until the electromagnetic energy is dissipated. The primary aim of plasmonics is to exploit the optical properties of metallic nanostructures to enable active manipulation of light at the nanoscale. The natural compatibility of plasmonics with electronics also offers a lot of promise for next-generation systems that will incorporate the best qualities of both photonics and electronics for communication at much higher speeds than what is possible today. A plasmonic device based on negative index materials (NIMs) is also thought to be able to help in constructing a superlens that can exceed the diffraction limit. NIMs are basically artificial structures where the refractive index has a negative value leading to an unnatural deviation of light during refraction when it is incident on to a NIM from a positive index material.

This course is going to cover the theoretical aspects of plasmas, plasmonics and negative index materials with a few lectures on computer simulations using FDTD.

Broad outline for the course:
  1. Maxwell's equations (Ch. 7,9 of Griffiths)
  2. Dispersion Model (Sec. 7.5 of Jackson)
  3. Charged particle dynamics in conductors (Plasmas)
  4. Evanescent Waves
  5. Scattering and Diffraction
  6. Surface Waves in Dielectrics
  7. Surface Plasmons (SP)
  8. Negative Index Materials (NIMs) (Veselago 1968, Ch. 1-2 of Marques, Ramakrishna 2005)
  9. FDTD method (Ch. 2, 4, 9 of Taflove&Hagness, MEEP)

Recommended books and papers: