Journal ArticleDOI
Internal fields of a spherical particle illuminated by a tightly focused laser beam: Focal point positioning effects at resonance
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TLDR
The dependence of structural resonance behavior on focal point positioning for a spherical particle illuminated by a tightly focused (beam diameter less than sphere diameter), linearly polarized, Gaussian-profiled laser beam was investigated in this article.Abstract:
The spherical particle/arbitrary beam interaction theory developed in an earlier paper is used to investigate the dependence of structural resonance behavior on focal point positioning for a spherical particle illuminated by a tightly focused (beam diameter less than sphere diameter), linearly polarized, Gaussian‐profiled laser beam. Calculations of absorption efficiency and distributions of normalized source function (electric field magnitude) are presented as a function of focal point positioning for a particle with a complex relative index of refraction of n=1.33+5.0×10−6i and a size parameter of α≊29.5 at both nonresonance and resonance conditions. The results of the calculations indicate that structural resonances are not excited during the on‐center focal point positioning of such a tightly focused beam but structural resonances can be excited by proper on‐edge focal point positioning. Electric wave resonances were found to be excited by moving the focal point from on‐center towards the edge of the sphere parallel to the direction of the incident beam electric field polarization. Magnetic wave resonances were found to be excited by moving the focal point from on‐center towards the edge of the sphere perpendicular to the direction of the incident beam electric field polarization.read more
Citations
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Journal ArticleDOI
Theoretical determination of net radiation force and torque for a spherical particle illuminated by a focused laser beam
TL;DR: In this paper, series expressions for the net radiation force and torque for a spherical particle illuminated by an arbitrarily defined monochromatic beam are derived utilizing the spherical particle/arbitrary beam interaction theory developed in an earlier paper.
Journal ArticleDOI
Fifth-order corrected electromagnetic field components for a fundamental Gaussian beam
John P. Barton,D. R. Alexander +1 more
TL;DR: In this article, the fifth-order corrected expressions for the electromagnetic field components of a monochromatic fundamental Gaussian beam (i.e., a focused TEM00 mode laser beam) propagating within a homogeneous dielectric media are derived.
Journal Article
Rigorous Justification of the Localized Approximation to the Beam-Shape Coefficients in Generalized Lorenz-Mie Theory
Gérard Gouesbet,James A. Lock +1 more
TL;DR: In this article, the generalized Lorenz-Mie theory describes electromagnetic scattering of an arbitrary light beam by a spherical particle and the computationally most expensive feature of the theory is the evaluation of the beam-shape coefficients, which give the decomposition of the incident light beam into partial waves.
Journal ArticleDOI
Rigorous justification of the localized approximation to the beam-shape coefficients in generalized Lorenz–Mie theory. I. On-axis beams
James A. Lock,Gérard Gouesbet +1 more
TL;DR: In this article, the generalized Lorenz-Mie theory describes electromagnetic scattering of an arbitrary light beam by a spherical particle and the computationally most expensive feature of the theory is the evaluation of the beam-shape coefficients, which give the decomposition of the incident light beam into partial waves.
Journal ArticleDOI
Generalized Lorenz–Mie theories and description of electromagnetic arbitrary shaped beams: Localized approximations and localized beam models, a review
TL;DR: Localized beam models have been particularly useful for speeding up numerical computations in the framework of generalized Lorenz-Mie theories (GLMTs), i.e. theories dealing with the interaction between electromagnetic arbitrary shaped beams and a regular particle, allowing one to solve the problem by using the method of separation of variables as discussed by the authors.
References
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Principles of Optics
TL;DR: In this paper, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Principles of Optics
TL;DR: In this article, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Journal ArticleDOI
Light Scattering by Small Particles
H. C. Van de Hulst,V. Twersky +1 more
TL;DR: Light scattering by small particles as mentioned in this paper, Light scattering by Small Particle Scattering (LPS), Light scattering with small particles (LSC), Light Scattering by Small Parts (LSP),
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Light Scattering by Small Particles
TL;DR: Light scattering by small particles as mentioned in this paper, Light scattering by Small Particle Scattering (LPS), Light scattering with small particles (LSC), Light Scattering by Small Parts (LSP),
Journal ArticleDOI
Theory of electromagnetic beams
TL;DR: In this paper, a relatively simple method for calculating the properties of a paraxial beam of electromagnetic radiation propagating in vacuum is presented, where the vector potential field is assumed to be plane-polarized.