Photon Statistics, Measurements, and Measurements Tools

Stevens, Martin J.

doi:10.1016/b978-0-12-387695-9.00002-0

Cited by 20 publications

(17 citation statements)

References 45 publications

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“…The experimental setup used has moderate detection efficiencies and harnesses SPCMs as click-detectors for photon counting. Therefore, the second-order correlation function can be extracted from a coincidence measurement precisely, whereas the measurement of the full photon number distribution needs high detection efficiencies and number resolving detectors [50]. We measure coincidences after pulsed excitation and approximate the value by integration over a time window of t = 0.5 ns as explained in detail in appendix B.…”

Section: Second-order Correlation Functionmentioning

confidence: 99%

Revealing superradiant emission in the single-to-bulk transition of quantum emitters in nanodiamond agglomerates

et al. 2022

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Individual quantum emitters form a fundamental building block for emerging quantum technologies. Collective effects of such emitters might improve the performance of applications even further. When scaling materials to larger sizes, however, collective effects might be covered by transitions to bulk properties. Here, we probe the optical properties of Nitrogen Vacancy (NV) centers in agglomerates of nanodiamonds. We quantify the transition from individual emitters to bulk emission by fluorescence lifetime measurements, and find a transition to occur on a length scale of ∼3 wavelengths around the emitter. While our lifetime measurements are consistent with superradiant decay, the second-order correlation function, which is a standard measure to reveal collective properties, fails to probe collective effects for our case of an ensemble of collectively contributing domains to the emission. Therefore, we propose and apply a new measure to trace collective effects based on the fluctuation statistics of the emitted light. Our work points toward systematically studying collective effects in a scalable solid-state quantum system, and using them for quantum optical applications in agglomerates of highly-doped nanodiamonds.

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Section: Second-order Correlation Functionmentioning

confidence: 99%

Revealing superradiant emission in the single-to-bulk transition of quantum emitters in nanodiamond agglomerates

et al. 2022

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“…For high heralding probabilities the experimental data deviates from the theory due to the approximation in Eq. ( 8) [49], since 𝑃(1) 𝑃( 2) no longer holds. Fig.…”

Section: Using a Conventional Snspds To Reduce The Second-order Corre...mentioning

confidence: 99%

Reducing $g^{(2)}(0)$ of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors

Sempere-Llagostera,

Thekkadath,

Patel

et al. 2021

Preprint

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Multiphoton contributions pose a significant challenge for the realisation of heralded single-photon sources (HSPS) based on nonlinear processes. In this work, we improve the quality of single photons generated in this way by harnessing the photon-number resolving (PNR) capabilities of commercial superconducting nanowire single-photon detectors (SNSPDs). We report a 13 ± 0.4% reduction in the intensity correlation function 𝑔 (2) (0) even with a collection efficiency in the photon source of only 29.6%. Our work demonstrates the first application of the PNR capabilities of SNSPDs and shows improvement in the quality of an HSPS with widely available technology.

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“…For high heralding probabilities the experimental data deviates from the theory due to the approximation in Eq. ( 8) [50], since (1) (2) no longer holds. Fig.…”

Section: Using a Conventional Snspd To Reduce Thementioning

confidence: 99%

Reducing g(2)(0) of a Parametric Down-Conversion Source via Photon-Number Resolution with Superconducting Nanowire Detectors

Sempere-Llagostera

Thekkadath²,

Patel³

et al. 2021

Quantum Information and Measurement VI 2021

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Multiphoton contributions pose a significant challenge for the realisation of heralded single-photon sources (HSPS) based on nonlinear processes. In this work, we improve the quality of single photons generated in this way by harnessing the photon-number resolving (PNR) capabilities of commercial superconducting nanowire single-photon detectors (SNSPDs). We report a 13 ± 0.4% reduction of (2) ( = 0), even with a collection efficiency in the photon source of only 29.6%. Our work demonstrates the first application of the PNR capabilities of SNSPDs and shows improvement in the quality of an HSPS with widely available technology.

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Photon Statistics, Measurements, and Measurements Tools

Cited by 20 publications

References 45 publications

Revealing superradiant emission in the single-to-bulk transition of quantum emitters in nanodiamond agglomerates

Revealing superradiant emission in the single-to-bulk transition of quantum emitters in nanodiamond agglomerates

Reducing $g^{(2)}(0)$ of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors

Reducing g(2)(0) of a Parametric Down-Conversion Source via Photon-Number Resolution with Superconducting Nanowire Detectors

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