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Vladislav Stefanov

Publications and source records attributed to Vladislav Stefanov.

2 recordsLinked to original sources

Polarimetric Backscattering Setup for Quantitative Scattering Parameters Retrieval

We present two backscattering polarimetric scanning setups based on point-illumination schemes, that are designed to probe the optical properties of subsurface media. We describe their advantages and limitations, characterize their performance in Mueller matrix determination, and demonstrate their ability to retrieve unknown sample parameters (such as the scattering coefficient and anisotropy factor) using a maximum likelihood approach. As an experimental validation, a polystyrene suspension is investigated as a representative case. By applying Fisher information formalism on the theoretical model, we estimate boundaries of the retrieved parameters.

physics.optics↗

Noise avalanche and its quantum quenching in bosonic chains with random off-diagonal disorder

Here we discuss a phenomenon of sharp increase in the photon number noise at initial stages of propagation in tight-binding bosonic chains with off-diagonal disorder. Such a "noise avalanche" occurs under classical coherent excitation of waveguides and leads to high super-thermal photon bunching. Additional classical excitation slows but cannot quench this noise avalanche. However, an additional single-photon excitation stops the avalanche.

quant-ph↗