Abstract
Dense comb on a chip
Highlights
A bright and efficient integrated singlephoton source has been made by combining a single InGaAs quantum dot with an optical element made by 3D printing technology
Scientists from Berlin and Stuttgart used electron-beam lithography to integrate the quantum dot with a GaAs microlens that sits on top of a distributed Bragg reflector
Feng Liang and co-workers from the Rowland Institute at Harvard University in the US and Swansea University in the UK have investigated this question in a quantitative manner using a plasmonic antenna-in-a-nanocavity single-molecule biosensor to study DNA–protein dynamics
Summary
A bright and efficient integrated singlephoton source has been made by combining a single InGaAs quantum dot with an optical element made by 3D printing technology. Scientists from Berlin and Stuttgart used electron-beam lithography to integrate the quantum dot with a GaAs microlens that sits on top of a distributed Bragg reflector. A multi-lens micro-objective was fabricated by 3D femtosecond direct laser writing and precisely aligned to the microlens in order to efficiently extract the emitted photons. The resulting light source operates with a photon extraction efficiency of ~40%. The team says that excellent single-photon purity is obtained with a g(2) factor of
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