Silicon avalanche photodiodes as detectors for photon correlation experiments

Overbeck, Ekkehard; Sinn, Christian; Flammer, I.; Rička, J.

doi:10.1063/1.1149130

Cited by 23 publications

(19 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This e ect can be visualized by noting that nonlinear e ects reduce the modulation of the (Gaussian)¯uctuations of the sample. Again, the bar denotes a certain averaging over both detectors; typical values are expected to be · non º 0:9 for moderate count rates [21].…”

Section: Detector Nonlinearitiesmentioning

confidence: 99%

See 1 more Smart Citation

Three-dimensional dynamic light scattering

Overbeck¹,

Sinn²

1999

Journal of Modern Optics

Self Cite

View full text Add to dashboard Cite

We describe the employment of a novel light-scattering scheme for the decorrelation of multiple scattering in strongly turbid samples. The three-dimensional scheme, which has been proposed already theoretically, shows certain advantages compared with the two-colour apparatus, which is commercially available. We describe our set-up in detail; features are the use of modern semiconductor laser diodes and contemporary single-mode ®bre receivers. We show experimentally that the optimal signal-to-noise ratio (or intercept) optˆ0 :20, which is obtainable with our set-up, can be quantitatively calculated from the measured uncertainties in the alignment. In particular, we give a detailed derivation of all factors in¯uencing the signal-to-noise ratio. We investigate a highly turbid polystyrene latex sample with a nominal radius of 57.5 nm and 5% solid content, to demonstrate clearly measurements of the cross correlation function without distortions due to multiple scattering. With its turbidity of 3 mm ¡1 at 790 nm this represents the most turbid sample which has been investigated by dynamic light scattering to date.

show abstract

Section: Detector Nonlinearitiesmentioning

confidence: 99%

“…The scattered light is coupled into a single-mode ®bre, which assures a high intercept as already noted. The detectors that we use are silicon avalanche photodiodes with a gated quenched circuit, the merits of which have already been published [21]. Their TTL signals are fed into a digital correlator (ALV-5000/E).…”

Section: Polarizationmentioning

confidence: 99%

Three-dimensional dynamic light scattering

Overbeck¹,

Sinn²

1999

Journal of Modern Optics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The straight line through g 12 t is a ®t to a single exponential which yields R 64X5 nm. For comparison, this ®t curve has been shifted to the data points of g 11 t. have an in¯uence on the data [16]. In addition, for strongly turbid samples, the statistical errors in determining the estimate for the true correlation function with the correlator play a role.…”

Section: Decorrelation Of Multiple Scatteringmentioning

confidence: 99%

Particle Characterization Using Multiple Scattering Decorrelation Methods. Part 1: Standard Latex Particles

Sinn

Niehüser

Overbeck

et al. 1999

Part. Part. Syst. Charact.

Self Cite

View full text Add to dashboard Cite

We determined the dimensions of standard polystyrene latex spheres suspended in water at different sample concentrations by dynamic light scattering and turbidimetry. Applying two different schemes for the decorrelation of multiple scattering, we show that the samples exhibit distortions of the auto-correlation function due to multiple scattering even at moderate volume fractions, which prohibits the correct determination of the particle radius. The cross-correlation functions, however, are free from these distortions. The recently deployed three-dimensional crosscorrelation setup is superior to the commercially available twocolor machine, as more turbid samples are accessible. In order to verify the results obtained by dynamic light scattering, we performed turbidity measurements with the same samples. This method is inherently free from multiple scattering contributions. We observe a systematically smaller radius in turbidimetry than in dynamic light scattering. The deviation, however, is only slightly outside the accuracy range of the measurements. We discuss possible origins for this deviation and show that our measurements are compatible with a hairy layer present on the particle's surface.

show abstract

“…It may seem that this configuration would remove the detector dead time effect because two successive photons detected at separate detectors appear to be free from the dead time effect of each detector. Unfortunately, the dead time effect on SOC nevertheless exists even in this usual configuration and the distortion in SOC is known to depend on the higher-order (N ≥ 3) correlation functions [11][12][13][14]. From this consideration, one can expect that it might be possible to extract the information on the higher-order correlations from the SOC measurement by analyzing the dead time effect.…”

Section: Introductionmentioning

confidence: 99%

Indirect measurement of three-photon correlation in nonclassical light sources

et al. 2016

View full text Add to dashboard Cite

We have observed the three-photon correlation in nonclassical light sources by using an indirect measurement scheme based on the dead time effect of photon-counting detectors. We first developed a general theory which enables us to extract the three-photon correlation from the twophoton correlation of an arbitrary light source measured with detectors with finite dead times. We then confirmed the validity of our measurement scheme in experiments done with the cavity-QED microlaser operating with a large intra-cavity mean photon number exhibiting both sub-and super-Poissonian photon statistics. The experimental results were in a good agreement with the theoretical expectation. Our measurement scheme provides an alternative approach for N -photon correlation measurement employing (N − 1) detectors and thus a reduced measurement time for a given signal-to-noise ratio, compared to the usual scheme requiring N detectors. arXiv:1608.07915v1 [quant-ph]

show abstract

Silicon avalanche photodiodes as detectors for photon correlation experiments

Cited by 23 publications

References 19 publications

Three-dimensional dynamic light scattering

Three-dimensional dynamic light scattering

Particle Characterization Using Multiple Scattering Decorrelation Methods. Part 1: Standard Latex Particles

Indirect measurement of three-photon correlation in nonclassical light sources

Contact Info

Product

Resources

About