Broadband enhancement and inhibition of single quantum dot emission in plasmonic nano-cavities operating at telecommunications wavelengths

Abstract : A plasmonic microcavity providing broadband control of spontaneous emission for large and sparse semiconductor quantum dots emitting at telecommunications wavelengths is proposed. By designing and fabricating such a cavity, we demonstrate a broadband Purcell effect with spontaneous emission enhancement over a broad spectral range of Dk ’ 20nm with a 3.9-fold maximum enhancement, as well as inhibition over Dk ’ 100 nm around 1.3 lm. The broadband feature relaxes the constraint on spectral matching between the dot emission and the cavity mode, favourable for implementing efficient non-classical light sources or nanoscale lasers.
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David Elvira, Remy Braive, Grégoire Beaudoin, Isabelle Sagnes, Jean-Paul Hugonin, et al.. Broadband enhancement and inhibition of single quantum dot emission in plasmonic nano-cavities operating at telecommunications wavelengths. Applied Physics Letters, American Institute of Physics, 2013, 103, pp.061113. ⟨10.1063/1.4818131⟩. ⟨hal-00859960⟩

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