Nanoantennas demonstrating weak superradiance

Dicke superradiance is a phenomenon where multiple closely spaced emitters can enter a collective excited state with a much shorter lifetime than the excited states of the individual emitters.

Together with collaborators at the Universities of Rochester, Ottawa, Toronto, British Columbia and the Technológico de Monterrey, we have now demonstrated that a similar phenomenon, termed weak superradiance exists for plasmonic nanoantennas. If N-antennas are contained within a circle with radius equal to the resonance wavelength of the antennas, then the extinction linewidth of the system is broadened by a factor N compared to the linewidth of the individual antennas.

As the antenna spacing is reduced the linewidth is broadened as more and more antennas are contained within a single wavelength radius.

This work is now published in the October edition of Physical Review A.

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