简介:Aphasespacemodeloftwo-dimensional(2D)Gaussianbeampropagationisgeneralizedforthree-dimensional(3D)generalastigmaticGaussianbeampassingthroughfirst-orderopticalsystem.ThegeneralastigmaticGaussianbeamisrepresentedbyafour-dimensional(4D)phasesuper-ellipsoidthatdefinedbyanassociated4×4realmatrix,thenthetransformationformulaofthephasesuper-ellipsoidofthebeamthroughfirst-orderopticalsystemisderived.Inparticular,inthephasespaceframework,thebeampropagationfactorM2valueisprovedtobearatioofphaseareaofrealbeamtoidealbeam,andanovelapproachforaqualitativeexaminationofthepropertiesoffractionalFouriertransform(FRT)forthebeamisalsoprovided.
简介:Byinvestigatingthecross-spectraldensityofpartiallycoherentmulti-rotatingellipticalGaussianbeams(REGBs)thatpropagatethroughafocusingopticalsystem,weobtaintheradiationforceonaRayleighparticle.Theradiationforcedistributionisstudiedunderdifferentbeamindexes,coherencewidths,andellipticalratiosofthepartiallycoherentmultiREGBs.Thetransverseandthelongitudinaltrappingrangescanincreaseatthefocalplanebyincreasingthebeamindexordecreasingthecoherencewidth.Therangeofthetrappedparticleradiiincreasesastheellipticalratioincreases.Furthermore,weanalyzethetrappingstability.
简介:Theopticalwavescatteringfromone-dimensional(1D)lossydielectricGaussianrandomroughsurfaceisstudied.ThetaperedincidentwaveisintroducedintotheclassicalKirchhoffapproximation(KA),andtheshadowingeffectisalsotakenintoaccounttomaketheKAresultshaveahighaccuracy.ThedefinitionofthebistaticscatteringcoefficientofthemodifiedKAandthemethodofmoment(MOM)areunified.ThecharacteristicsoftheopticalwavescatteringfromthelossydielectricGaussianrandomroughsurfaceofdifferentparametersareanalyzedbyimplementingMOM.
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