Dissertation > Excellent graduate degree dissertation topics show
Study on Scattering Characteristics of Gaussian Beam by Typical Particle
Author: ZhangHuaYong
Tutor: HanYiPing
School: Xi'an University of Electronic Science and Technology
Course: Optics
Keywords: Gaussian beam beam shape coefficients arbitrary illumination spheroidal particle concentric spheroid with nonconfocal boundaries infinitely long circular cylindrical particle
CLC: TN011
Type: PhD thesis
Year: 2008
Downloads: 150
Quote: 2
Read: Download Dissertation
Abstract
In this thesis, an analytic solution to the scattering of the Gaussian beam by a spheroidal particle and by an infinitely long circular cylindrical particle in the general case of arbitrary illumination is constructed. The main contributions of the author’s works are as follows:1. Based on the generalized LorenzMie theory and addition theorem for spherical vector wave functions under coordinate rotations, an expansion of the incident Gaussian beam in terms of the spheroidal vector wave functions natural to a spheroid of arbitrary location and orientation is derived, and also the representations for the beam shape coefficients. For the special cases of the spheroidal particle center located on the Gaussian beam axis and the incident plane wave, the simplified expressions are given.2. The relations between the cylindrical vector wave functions of the first kind and the spherical ones are provided, on the basis of which a description of the expansion of the Gaussian beam with arbitrary illumination in terms of the cylindrical vector wave functions is presented, and also the representations for the corresponding beam shape coefficients. For the special cases of the cylinder axis intersecting the Gaussian beam axis and plane wave illumination, the simplified computational expressions are available.3. The scattering of the Guassian beam with arbitrary illumination by a spheroidal particle is studied by means of the method of separation of variables, thus extending the parallel propagation of the Gaussian beam available in the literature to the general case of arbitrary illumination.4. For a concentric spheroid with nonconfocal boundaries, the difficulty appears of handling the electromagnetic boundary conditions as its boundaries can be the coordinate surfaces in different spheroidal systems. In this thesis a theoretical procedure is developed to deal with the nonconfocal boundary conditions, based on which the Gaussian beam scattering by an arbitrarily oriented spheroid having layers with nonconfocal boundaries is studied.5. A method of calculating the scattered electromagnetic fields of an infinitely long circular cylinder of arbitrary orientation illuminated with a Gaussian beam is presented, and the general expression to compute the scattered fields in the far zone is obtained. For the case of a tightly focused Gaussian beam, naturally a threedimensional problem, the scattering characteristics that are different from those for an incident plane wave are described in detail

Related Dissertations
 Theoretical Investigation on the Light Force Exerted by a Laser Beam on a Negative Index Material Sphere,TN241
 The Study of the Radiation Forces Exert on the Rayleigh Particles by the Laser Beam,O436.2
 Propagation Properties of Femtosecond Pulsed Beams in Dispersive,TN249
 Study on the Properties of CLens Collimator,TN253
 Scattering of a Spheroidal Particle llluminated by Gaussian Beam,TN011
 The Study of Adaptive Fiber Coupling Based on of Variable Quality of Laser Beam,TN248
 Fractional Transforms and Their Applications in Image Encryption and Filtering,O438
 Study of the Scattering Characteristics of Metallic Wire Grids at Submillimeter Wavelengths,TN25
 Research on the Resonator with Diffraction Optical Elements and Its Applications,TN243
 Investigation on the Transformation and Coincidence Imaging of Complicated Laser Beams,TN241
 Crystal polarizing prism effect of the laser beam,O436.3
 The Comparison and Study of Vectorial Diffraction Theories and Its Application,O436
 An Initial Research for Interaction of Strongly Nonlocal Optical Spatial Solitons,O436
 Nonlinear Optical Properties of πconjugated Polymers and a Novel Zscan Theory,O437
 Theoretical Study of Novel Atomoptical Mirrors,O562
 Steadystate nonlinear self focusing problem,O432.12
 Study on the Characteristics of Laser Propagation and Attenuation Through the Fog,TN241
 Debye Series of Gaussian Beam Scattering by Imhomogeneous Sphere,O436
 Optical tweezers capture of particles in the radiation power of,TN201
 Researches on Intense Laser Indused Damage of the Photoelectric Detectors,TN36
CLC: > Industrial Technology > Radio electronics, telecommunications technology > General issues > Basic theory > Radio wave propagation,the propagation mechanism
© 2012 www.DissertationTopic.Net Mobile
