Coherent backscattering of turbid samples containing large Mie spheres

Lenke, Ralf; Tweer, Ralf; Maret, Georg

doi:10.1088/1464-4258/4/3/313

Cited by 33 publications

(20 citation statements)

References 13 publications

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“…8,27,28,42,43 Using this method, a portion of scattered intensity is collected after a photon reaches each new position within the medium. This "partial photon" intensity I partial is calculated by multiplying the probability that the photon is scattered in the direction of the surface Fðθ s ; 0Þ by the probability that it will reach surface according to the Beer-Lambert law e −ðμ s þμ a Þz :…”

Section: Semi-analytical Approachmentioning

confidence: 99%

“…Of particular importance for this paper are CBS codes that have been developed to model and calculate tissue optical properties, 18,23,24 electric field tracking codes, 25,26 and codes that implement the semi-analytical approach (also known as the partial photon technique). 8,27,28 In this paper, we have developed a polarized light Monte Carlo algorithm written in the C programming language that tracks the progression of the electric field in scattering and absorbing media containing birefringent materials. This code enables the modeling of tissue as a statistically homogeneous continuous random media under the Whittle-Matérn model or as a composition of discrete spherical scatterers under Mie theory.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Open source software for electric field Monte Carlo simulation of coherent backscattering in biological media containing birefringence

Radosevich¹,

Rogers²,

Capoglu³

et al. 2012

J. Biomed. Opt

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Abstract.We present an open source electric field tracking Monte Carlo program to model backscattering in biological media containing birefringence, with computation of the coherent backscattering phenomenon as an example. These simulations enable the modeling of tissue scattering as a statistically homogeneous continuous random media under the Whittle-Matérn model, which includes the Henyey-Greenstein phase function as a special case, or as a composition of discrete spherical scatterers under Mie theory. The calculation of the amplitude scattering matrix for the above two cases as well as the implementation of birefringence using the Jones N-matrix formalism is presented. For ease of operator use and data processing, our simulation incorporates a graphical user interface written in MATLAB to interact with the underlying C code. Additionally, an increase in computational speed is achieved through implementation of message passing interface and the semi-analytical approach. Finally, we provide demonstrations of the results of our simulation for purely scattering media and scattering media containing linear birefringence.

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Section: Semi-analytical Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Open source software for electric field Monte Carlo simulation of coherent backscattering in biological media containing birefringence

Radosevich¹,

Rogers²,

Capoglu³

et al. 2012

J. Biomed. Opt

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show abstract

“…A diffusive approximating is applicable when it is possible to neglect an absorption and when a thickness of sample is much greater than the transport path length of photons [7][8][9]. In this case, the radiation transfer can be described by the diffusion …”

Section: Discussionmentioning

confidence: 99%

Registration of CBS Effects from Wedge-shaped Samples Containing Particles of Alumina

Исмаилов¹,

Kamenev²

2018

KEn

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The paper looks at recent results of research dealing with a coherent backscattering (CBS) on the particles of alumina. It was developed a system of registration of CBS with a tunable dynamic sample. During the experiment the transport mean free path over the width of the peak of angular profile of signal intensity of CBS was determined. Moreover, new scientific data about the CBS's profiles from randomly inhomogeneous environments were obtained.

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“…This problem can be avoided by using a movable fiber, which scans the angular dependence of the backscattered light. 11,12 In this case, care has to be taken that the recorded light always passes the polarization filter ͑and QWP, see below͒ at right angles, such that singly scattered light can be efficiently and homogeneously reduced. Otherwise the polarization properties will change, leading to a misestimation of the incoherent background and hence a distortion of the CBC.…”

Section: B Former Setup Designsmentioning

confidence: 99%

“…10,12 Our setup uses a lens with a focal distance of 0.1 m which is also the distance between the lens and the CCD chip. The CCD chip has a resolution of 512 ϫ 512 pixels, which in this setup results in an angular resolution of 0.012°over a range of ±3°.…”

Section: -4mentioning

confidence: 99%

A precise method to determine the angular distribution of backscattered light to high angles

Groß

Störzer

Fiebig

et al. 2007

Review of Scientific Instruments

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We present an approach to measure the angular dependence of the diffusely scattered intensity of a multiple scattering sample in backscattering geometry. Increasing scattering strength give rise to an increased width of the coherent backscattering and sets higher demands on the angular detection range. This is of particular interest in the search for the transition to Anderson localization of light. To cover a range of −60°to +85°from direct back-reflection, we introduced a new parallel intensity recording technique. This allows one-shot measurements, with fast alignment and short measuring time, which prevents the influence of illumination variations. Configurational average is achieved by rotating the sample and singly scattered light is suppressed with the use of circularly polarized light up to 97%. This implies that backscattering enhancements of almost two can be achieved. In combination with a standard setup for measuring small angles up to ±3°, a full characterization of the coherent backscattering cone can be achieved. With this setup we are able to accurately determine transport mean free paths as low as 235 nm.

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Coherent backscattering of turbid samples containing large Mie spheres

Cited by 33 publications

References 13 publications

Open source software for electric field Monte Carlo simulation of coherent backscattering in biological media containing birefringence

Open source software for electric field Monte Carlo simulation of coherent backscattering in biological media containing birefringence

Registration of CBS Effects from Wedge-shaped Samples Containing Particles of Alumina

A precise method to determine the angular distribution of backscattered light to high angles

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