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15 June 2023 New interferometric photon-correlation tools for spectral diffusion measurements of emerging single-photon emitters
Hendrik Utzat
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Proceedings Volume PC12512, Advanced Photon Counting Techniques XVII; PC1251206 (2023) https://doi.org/10.1117/12.2664090
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States
Abstract
Spectral diffusion is a ubiquitous process caused by bath fluctuations which randomizes the spectral mode of single-photon emitters at cryogenic temperatures. Accurately measuring spectral diffusion on a single-emitter level is still a challenging task owing to the required high spectral and temporal resolution with an additionally high temporal dynamic range. In this talk, I highlight our recent progress towards understanding spectral diffusion in nascent quantum emitters using photon-correlation Fourier spectroscopy (PCFS). PCFS can measure the bandwidth and kinetics of spectral fluctuations down to nanosecond timescales. Using PCFS, I show how quantum emitters in 2D hexagonal boron nitride exhibit multi-timescale discrete spectral jumping that can be attributed to a bath with at least two characteristic fluctuation relaxation time constants.Broadly, I propose PCFS as a particularly suitable tool for the detailed study of decoherence processes and spectral diffusion.
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Hendrik Utzat "New interferometric photon-correlation tools for spectral diffusion measurements of emerging single-photon emitters", Proc. SPIE PC12512, Advanced Photon Counting Techniques XVII, PC1251206 (15 June 2023); https://doi.org/10.1117/12.2664090
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KEYWORDS
Diffusion
Interferometry
Quantum dots
Boron
Fourier spectroscopy
Perovskite
Lead
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