Efficient electrical field Monte Carlo simulation of coherent backscattering

Hank, Philipp; Foschum, Florian; Geiger, Simeon; Kienle, Alwin

doi:10.1016/j.jqsrt.2022.108230

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…To calculate the derivative of N optical parameters one could perform

Monte Carlo simulations (one base simulation of p and N simulations of each varied parameter

). However, as already widely used in Monte Carlo simulations, we can make use of perturbation Monte Carlo (pMC) to efficiently compute small perturbations

of a background Monte Carlo simulation [ 30 , 31 , 32 , 33 , 34 ]. In pMC, the simulation is scaled by a scaling function

to change the contribution of the parameter p as

…”

Section: Methodsmentioning

confidence: 99%

Optical Goniometer Paired with Digital Monte Carlo Twin to Determine the Optical Properties of Turbid Media

Stolz,

Beutel,

Kienle

et al. 2024

Sensors

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We present a goniometer designed for capturing spectral and angular-resolved data from scattering and absorbing media. The experimental apparatus is complemented by a comprehensive Monte Carlo simulation, meticulously replicating the radiative transport processes within the instrument’s optical components and simulating scattering and absorption across arbitrary volumes. Consequently, we were able to construct a precise digital replica, or “twin”, of the experimental setup. This digital counterpart enabled us to tackle the inverse problem of deducing optical parameters such as absorption and scattering coefficients, along with the scattering anisotropy factor from measurements. We achieved this by fitting Monte Carlo simulations to our goniometric measurements using a Levenberg–Marquardt algorithm. Validation of our approach was performed using polystyrene particles, characterized by Mie scattering, supplemented by a theoretical analysis of algorithmic convergence. Ultimately, we demonstrate strong agreement between optical parameters derived using our novel methodology and those obtained via established measurement protocols.

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