Laser–particle interactions in shaped beams: Beam power normalization

Stout, Brian; Rolly, Brice; Fall, Mandiaye; Hazart, J.; Bonod, Nicolas

doi:10.1016/j.jqsrt.2012.10.007

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…For the total incidence cross-section the expression agrees with κ/k 2 , from Ref. [35] upon using the special values for Π n (π/2) = − cos (π [n + 1] /2) n! !/(n − 1)!!…”

Section: Fractional Cross-sections (Analytical)supporting

confidence: 59%

Energy-redistribution signatures in transmission microscopy of Rayleigh and Mie particles

Selmke

Cichos

2014

J. Opt. Soc. Am. A

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The transmission characteristics of a spherical (possibly multilayered) particle of arbitrary size under focused illumination are discussed within the generalized Lorenz-Mie theory. Expressions generalizing the total extinction and scattering cross-sections to their fractional counterparts are presented which allow for a convenient modeling of transmission signals, both on-axis and off-axis. The strong dependence of the signal on the collection angle and the complex polarizability are readily included in this minimal, yet accurate model. The precise signature of the energy redistribution and absorption are found for particles of arbitrary complex-valued polarizability. For perfect dielectrics, a transition from sensitive extinction to insensitive scattering signals is observed and quantified for apertures including angles larger than twice the beam's angle of divergence. Implications for positioning, temperature control, spectroscopy and optimized extinction measurements are discussed.

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“…For the total incidence cross-section the expression agrees with κ/k 2 , from Ref. [35] upon using the special values for Π n (π/2) = − cos (π [n + 1] /2) n! !/(n − 1)!!…”

Section: Fractional Cross-sections (Analytical)supporting

confidence: 59%

Energy-redistribution signatures in transmission microscopy of Rayleigh and Mie particles

Selmke

Cichos

2014

J. Opt. Soc. Am. A

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“…The torque obtained by solving the scattering problem can be written in terms of normalized quantities [13] as…”

Section: Electromagnetic Forces and Torquesmentioning

confidence: 99%

Polarized scattering by Gaussian random particles under radiative torques

Herranen

Markkanen

Muinonen

2018

Journal of Quantitative Spectroscopy and Radiative Transfer

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We study the internal alignment of a statistical ensemble of Gaussian random ellipsoids with respect to the radiation direction. We solve the rigid body dynamics due to scattering forces and torques, using a numerically exact and efficient T-matrix solver for arbitrary particle shapes and compositions. We then compare the polarization of the aligned ensemble to a randomly oriented ensemble and a perfectly aligned ensemble. We find that the ensemble becomes partially aligned under monochromatic radiation and that the internal alignment has an significant effect on the intensity and polarization of the scattered light.

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“…(44) [43][44][45]. The localized beam shape coefficients described above can also be normalized with respect to the incident power [46]. This normalization proves to be useful in the calculation of scattering cross sections.…”

Section: Beam Shape Coefficients Of a Remodeled Davis Beammentioning

confidence: 99%

Angular spectrum and localized model of Davis-type beam

Lock¹

2013

J. Opt. Soc. Am. A

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The angular spectrum of the Davis fifth-order linearly polarized, dual, and symmetrized fields of a focused Gaussian laser beam is obtained. Since the original Davis fields are not an exact solution of the vector wave equation and Maxwell's equations, a beam remodeling procedure within the angular spectrum is described that produces an exact solution. The spherical multipole beam shape coefficients of the remodeled beam are then obtained, and it is shown that in the weak focusing limit they simplify to the localized model Gaussian beam shape coefficients for both on-axis and off-axis beams. The angular spectrum method is then applied to a transversely confined electromagnetic beam with arbitrary profile in the focal plane, and to a general zero-order Bessel beam.

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Laser–particle interactions in shaped beams: Beam power normalization

Cited by 5 publications

References 16 publications

Energy-redistribution signatures in transmission microscopy of Rayleigh and Mie particles

Energy-redistribution signatures in transmission microscopy of Rayleigh and Mie particles

Polarized scattering by Gaussian random particles under radiative torques

Angular spectrum and localized model of Davis-type beam

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