Abstract
We demonstrate efficient (>30%) quantum frequency conversion of visible single photons (711nm) emitted by a quantum dot to a telecom wavelength (1313nm). Analysis of the first- and second-order coherence before and after wavelength conversion clearly proves that pivotal properties, such as the coherence time and photon antibunching, are fully conserved during the frequency translation process. Our findings underline the great potential of single photon sources on demand in combination with quantum frequency conversion as a promising technique that may pave the way for a number of new applications in quantum technology.
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