Nondiffractive-nondiffusive beams in complex crystals

Self-collimation in PT -symmetric crystals

We predict the self-collimation phenomena (or equivalently, dynamical localization) in two-dimensional PT symmetric complex potentials, where the complex modulation is considered in the transverse, longitudinal, or simultaneously in both directions. Nondiffractive propagation is analytically predicted and further confirmed by numerical integration of a paraxial model. The parameter space is exp...

Quasi–Nondiffractive Beams for OCT–Visualization: Theoretical and Experimental Investigations

5 Ju n 20 05 Diffraction - Attenuation Resistant Beams in Absorbing Media ( † ) Michel Zamboni - Rached

In this work, in terms of suitable superpositions of equal-frequency Bessel beams, we develop a theoretical method to obtain nondiffractive beams in (weakly conductive) absorbing media capable to resist the loss effects for long distances.

Characterization of Nondiffracting Bessel Beams in the Propagation Range

Nondiffractive Bessel beams were generated experimentally and their propagation was characterized using the self-convergent width method. By the use of this criterion for the calculation of the truncated second-moment of the irradiance, the invariant propagation of the generated Bessel beams is confirmed.

Empirical relationship between Kubelka-Munk and radiative transfer coefficients for extracting optical parameters of tissues in diffusive and nondiffusive regimes.

Kubelka–Munk (K-M) theory is a phenomenological light transport theory that provides analytical expressions for reflectance and transmittance of diffusive substrates such as tissues. Many authors have derived relations between coefficients of K-M theory and that of the more fundamental radiative transfer equations. These relations are valid only in diffusive light transport regime where scatter...