Propagation of Surface Plasmons in Ordered and Disordered Chains of Metal Nanospheres

Details Propagation of Surface Plasmons in Ordered and Disordered Chains of Metal Nanospheres Propagation of Surface Plasmons in Ordered and Disordered Chains of Metal Nanospheres

2006-09-15

arxiv.org/abs/physics/0609140v1

Phys. Rev. B 75, 085426 (2007)

Physics

Optics

Scientific paper

10.1103/PhysRevB.75.085426

We report a numerical investigation of surface plasmon (SP) propagation in ordered and disordered linear chains of metal nanospheres. In our simulations, SPs are excited at one end of a chain by a near-field tip. We then find numerically the SP amplitude as a function of propagation distance. Two types of SPs are discovered. The first SP, which we call the ordinary or quasistatic, is mediated by short-range, near-field electromagnetic interaction in the chain. This excitation is strongly affected by Ohmic losses in the metal and by disorder in the chain. These two effects result in spatial decay of the quasistatic SP by means of absorptive and radiative losses, respectively. The second SP is mediated by longer range, far-field interaction of nanospheres. We refer to this SP as the extraordinary or non-quasistatic. The non-quasistatic SP can not be effectively excited by a near-field probe due to the small integral weight of the associated spectral line. Because of that, at small propagation distances, this SP is dominated by the quasistatic SP. However, the non-quasistatic SP is affected by Ohmic and radiative losses to a much smaller extent than the quasistatic one. Because of that, the non-quasistatic SP becomes dominant sufficiently far from the exciting tip and can propagate with little further losses of energy to remarkable distances. The unique physical properties of the non-quasistatic SP can be utilized in all-optical integrated photonic systems.

Affiliated with

Also associated with

No associations

Rating

Propagation of Surface Plasmons in Ordered and Disordered Chains of Metal Nanospheres does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Propagation of Surface Plasmons in Ordered and Disordered Chains of Metal Nanospheres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Propagation of Surface Plasmons in Ordered and Disordered Chains of Metal Nanospheres will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-411049