The geometrical nature of optical resonances in nanoparticles

Details The geometrical nature of optical resonances in nanoparticles The geometrical nature of optical resonances in nanoparticles

2011-02-24

arxiv.org/abs/1102.4958v1

Physics

Optics

4 pages, 3 figures

Scientific paper

We give a geometrical theory of resonances in Maxwell's equations that generalizes Mie formulae for spheres to any dielectric or metallic particle without sharp edges. We show that the electromagnetic response of a particle is given by a set of modes of internal and scattered fields and reveal a strong analogy between resonances in nanoparticles and excess noise in unstable macroscopic cavities. We give examples of two types of optical resonances: those in which a single pair of internal and scattered modes become strongly aligned in the sense defined in this paper, and those resulting from constructive interference of many pairs of weakly aligned modes, an effect relevant for sensing. We demonstrate that modes can be either bright or dark depending on the incident field and give examples of how the excitation can be optimized. Finally, we apply this theory to gold particles with shapes often used in experiments.

Affiliated with

Also associated with

No associations

Rating

The geometrical nature of optical resonances in nanoparticles 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 The geometrical nature of optical resonances in nanoparticles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The geometrical nature of optical resonances in nanoparticles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-86484