Dispersion and extinction of surface plasmons in an array of gold nanoparticle chains: influence of the air/glass interface.
We investigate the dispersion relation and extinction properties of surface plasmons in an array of gold nanoparticle chains under s-polarized plane wave excitations, through experiment and simulation. Our results reveal that the dispersion and extinction properties of gold nanoparticle chains at an air/glass interface are significantly different from those in a uniform medium. Under total internal reflection, the dispersion is much larger than that above total internal reflection and 100% extinction can be reached. We show that the large dispersion under total internal reflection can be explained by dipole fields and coupling at the air/glass interface.
Yang
Tian
T
School of Engineering and Applied Sciences, Harvard University, 33 Oxford Street, Maxwell Dworkin, Cambridge, Massachusetts 02138, USA. tianyang@deas.harvard.edu
Crozier
Kenneth B
KB
D000388:Air; D003198:Computer Simulation; D005898:Glass / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008027:Light; D008956:Models, Chemical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
D006046:Gold