Bouncing surface plasmons | Zendy

Ni. V. Kuzmin | Zendy; Paul F. A. Alkemade | Zendy; G. W. ’t Hooft | Zendy; E. R. Eliel | Zendy

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Bouncing surface plasmons

Author(s) -

Ni. V. Kuzmin,

Paul F. A. Alkemade,

G. W. ’t Hooft,

E. R. Eliel

Publication year - 2007

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.15.013757

Subject(s) - optics , surface plasmon , plasmon , finesse , wavelength , reflection (computer programming) , interferometry , localized surface plasmon , phase (matter) , scattering , materials science , reflection coefficient , ray , surface plasmon resonance , physics , light scattering , surface plasmon polariton , fabry–pérot interferometer , quantum mechanics , computer science , nanoparticle , programming language , nanotechnology

Employing an interferometric cavity ring-down technique we study the launching, propagation and reflection of surface plasmons on a smooth gold-air interface that is intersected by two parallel, sub-wavelength wide slits. Inside the low-finesse optical cavity defined by these slits the surface plasmon is observed to make multiple bounces. Our experimental data allow us to determine the surface-plasmon group velocity (v(groug) = 2.7+/-0.3x10(-8) m/s at lambda = 770 nm) and the reflection coefficient (R approximately 0.04) of each of our slits for an incident surface plasmon. Moreover, we find that the phase jump upon reflection off a slit is equal to the scattering phase acquired when light is converted into a plasmon at one slit and back-converted to light at the other slit. This allows us to explain fine details in the transmission spectrum of our double slits.

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