Abstract

Semiconductor quantum dots are useful emitters in various contexts. They are, for example, a bright source of photons because of the possibility to generate multiple excitons within one quantum dot and subsequently obtain the emission of multiple photons upon each excitation. In practice, however, such multiphoton emission is often inefficient due to fast nonradiative decay channels such as Auger recombination. We have recently demonstrated that the biexciton emission efficiency can be significantly improved by a large radiative enhancement in the near field of a gold nanocone antenna [1].

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