What is it about?
In this work, we show that metallic nano-rings combined with metallic back reflectors increase the extraction efficiency of quantum light emitted by semiconductor quantum dots. We study the statistics of this effect over a large number of emitters (more than 200) randomly distributed on the chip and operating over a wavelength range of about 80 nm.
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Why is it important?
Our devices do not rely on narrowband optical cavities in fragile nano- or micro-structures, but they are broadband (the increase in brightness is observed over about 60 nm) and provide enhancement effects, allowing to collect photon fluxes reaching 7 million photons per second, with single-photon purities as high as 85%.
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This page is a summary of: Broadband, efficient extraction of quantum light by a photonic device comprised of a metallic nano-ring and a gold back reflector, Applied Physics Letters, February 2022, American Institute of Physics, DOI: 10.1063/5.0082347.
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