Superradiance, subradiance, and suppressed superradiance of dipoles near a metal interface

Abstract

We theoretically characterize the collective radiative behaviour of N classical emitters near an interface between different dielectrics that supports the transfer of surface plasmon modes into the far-field of electromagnetic radiation. The phenomena of superradiance and surface plasmons can be combined to amplify the emitted radiation intensity S as S= A N^2 S_0 compared to a single emitter's intensity S_0 in free space. For a practical case study within the paper A=240, compared to A=1 in free space. We furthermore demonstrate that there are collective modes for which the intensity of the emitted radiation is suppressed by two orders of magnitude despite their supperadiant emission characteristics. A method to control the emission characteristics of the system and to switch from super- to sub-radiant behaviour with a suitably detuned external driving field is devised.

to appear in Phys. Rev. A

References in corpus (3)

• Strong coupling of single emitters to surface plasmons
• Rayleigh superradiance and dynamic Bragg gratings in an end-pumped Bose-Einstein condensate
• Super- and subradiant emission of two-level systems in the near-Dicke limit

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• Area theorem for surface plasmons interacting with resonant atoms