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复杂目标光学散射截面数值仿真方法（英文）.docx

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复杂目标光学散射截面数值仿真方法（英文） Title:NumericalSimulationMethodsforComplexTargetOpticalScatteringCross-Section Abstract: Opticalscatteringisafundamentalphenomenonthatoccurswhenlightinteractswithmatter.Understandingandaccuratelypredictingthescatteringbehaviorofcomplextargetsiscrucialinvariousfieldssuchasoptics,photonics,andremotesensing.Thispaperpresentsanoverviewofnumericalsimulationmethodsforcalculatingtheopticalscatteringcross-sectionofcomplextargets.Wediscusstheimportanceofopticalscattering,thechallengesassociatedwithsimulatingcomplextargets,andthevariousnumericaltechniquesemployedintacklingthesechallenges.Thepaperalsohighlightsthestrengthsandlimitationsofdifferentsimulationmethodsandprovidesfutureresearchdirectionsinthefieldofcomplextargetopticalscatteringsimulations. Introduction: Opticalscatteringistheprocessbywhichlightisdeflectedorscatteredbyobjectswhenitinteractswiththeirsurfaces.Thescatteringbehavioroftargetsisdeterminedbytheirsize,shape,composition,andthenatureoftheincidentlight.Accuratelycharacterizingthescatteringpropertiesofcomplextargetsisessentialforvariousapplicationssuchastargetdetection,localization,andidentificationinremotesensing,aswellasinthedesignandoptimizationofopticaldevicesandsystems. ChallengesinSimulatingComplexTargets: Simulatingtheopticalscatteringbehaviorofcomplextargetsposesseveralchallenges.First,complextargetsoftenpossessirregularshapesthatcannotbeeasilydescribedanalytically.Second,thesizeofthetargetandthewavelengthoftheincidentlightareoftencomparable,leadingtosignificantmultiplescatteringanddiffractioneffects.Lastly,materialswithnon-uniformrefractiveindices,anisotropicproperties,andsurfaceroughnessfurthercomplicatethescatteringphenomena. NumericalSimulationMethods: 1.Finite-DifferenceTime-Domain(FDTD)Method: TheFDTDmethodsolvesMaxwell'sequationsnumericallyonadiscretizedgrid.Itenablesthemodelingofcomplextargetshapesandarbitraryelectromagneticsources.FDTDcanhandlebroadbandandpulsedsources,makingitsuitableforsimulatingcomplextargetscatteringove