Photon indistinguishability measurements under pulsed and continuous excitation
arXiv:2107.09434 · doi:10.1103/PhysRevResearch.4.013037
Abstract
The indistinguishability of successively generated photons from a single quantum emitter is most commonly measured using two-photon interference at a beam splitter. Whilst for sources excited in the pulsed regime the measured bunching of photons reflects the full wavepacket indistinguishability of the emitted photons, for continuous wave (cw) excitation the inevitable dependence on detector timing resolution and driving strength obscures the underlying photon interference process. Here we derive a method to extract the photon indistinguishability from cw measurements by considering the relevant correlation functions. The equivalence of both methods is experimentally verified through comparison of cw and pulsed excitation of an archetypal source of photons, a single molecule.
arXiv comment6 page paper, 11 page supplement. Comments welcome
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- Probing Ultra-Fast Dephasing via Entangled Photon Pairs
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