简介：Aninfraredsensorusingtheliquidcrystalchopperispresented.Theinfraredsensorisdesignedtodetectinfraredrayswithapyroelectricelementusedasaliquidcrystalchopperinsuchaninfraredsensororthelike.

简介：Infraredphotodetectorshavebeenusedextensivelyinbiomedicine,surveillance,communicationandastronomy.However,stateofthearttechnologybasedonIII-VandII-VIcompoundsstilllacksexcellentperformanceforhigh-temperatureoperation.Surfaceplasmonpolaritons(SPPs)havedemonstratedtheircapabilityinimprovingthelightdetectionfromvisibletoinfraredwaverangeduetotheirlightconfinementinsubwavelengthscale.Advancedfabricationtechniquessuchaselectron-beamlithography(EBL)andfocusedion-beam(FIB),andcommerciallyavailablenumericaldesigntoollikeFinite-DifferenceTime-Domain(FDTD)haveenabledrapiddevelopmentofsurfaceplasmon(SP)enhancedphotodetectors.Inthisreviewarticle,thebasicmechanismsbehindtheSP-enhancedphotodetection,thedifferenttypeofplasmonicnanostructuresutilizedforenhancement,andthereportedSP-enhancedinfraredphotodetectorswillbediscussed.

简介：Inthetheorycalculationoflatticevibration,oneacousticandthreeopticalbrancheswerefoundtocomposethephononvibratingspectrum.Someisolatedmodeswithfrequencieslyingoutsidethecontinuumbrancheswillariseunderthedefectstates.TheselocalmodelresultsinthesharppeaksintheinfraredabsorptionandRamanspectra.Fromcalculationoftheinfraredabsorption,thelocalmodewiththeinfraredactivityisobtainedintheinfraredabsorptionspectrumofMXcompounds.

简介：Thispaperreportsthathexagonal-phaseLaF3:Yb30.20,Er30.02andLaF3:Yb30.20,Tm30.02nanocrystals(NCs)weresynthesizedviaahydrothermalmethod.Thetransmissionelectronmicroscopy,selectedareaelectrondiffraction,powderx-raydiffraction,andthermogravimetricanalysisareusedtocharacterizetheNCs.Under980nmexcitation,theYb3/Er3andYb3/Tm3codopedNCscolloidalsolutionspresentbrightgreenandblueupconversionfluorescence,respectively.TheseNCsshowefficientinfrared-to-violetandinfrared-to-visibleupconversion.TheupconversionfluorescencemechanismsofLaF3:Yb30.20,Er30.02andLaF3:Yb30.20,Tm30.02NCsareinvestigatedwitha980-nmdiodelaserasexcitationsource.

简介：Thequantumvibrationalenergy-spectraincludinghighexcitedstatesoftheproteinmoleculeshavebeencalculatedbynewtheoryofbio-energytransportalongtheproteinmoleculesanditsdynamicequation,discretenonlinearSchrodingerequation,appropriatetotheproteinmoleculesonthebasisofthelevelofmolecularstructure.Thisenergy-spectraobtainedarebasicallyconsistentwiththeexperimentalvaluesbyinfraredabsorptionandradiatedmeasurementofperson'shandsandlaser-RamanspectrumfrommetabolicallyactiveE.Coli..Fromthisenergy-spectraweknowthattheinfraredlightswith(1-3)x1000nmand(5-7)x1000nmwavelengthcanbeabsorbedbytheproteinmoleculesinthelivingsystems.Inaccordancewiththenon-lineartheoryofthebio-energytransportweknowthattheenergyoftheinfraredlightabsorbedbytheproteinscanresultinvibrationsofamide-Iinaminoacidsandcanfacilitatethebio-energytransportalongtheproteinmolecularchainsfromoneplacetootherforthegrowthoflivingbodies.Thisprocesseisnon-thermal.Thisisjustnon-thermaleffectoftheinfraredlights.Accordingtothemechanismweexplainedfurtherthemedicalfunctionsoftheinfraredlightsabsorbed.

简介：Theinfraredmulti-photondissociation（IRMPD）ofaceticanhydridetogeneratestate-selectedCH2hasbeeninvestigatedbyusingtimeandwavelengthresolvedfluorescencetechniques.IthasbeenobservedthatthegenerationofthenascentgroundstateCH2（a1A1）isdelayedbyabout0.6μsrelativetotheonsettimeoftheexcitedCH2（b1B1）.TherelativepopulationofthegroundandexcitedstateCH2andtheonsettimefortheappearanceofthegroundstateCH2havebeenfoundtodependstronglyonCO2laseroutputfluences.TheseresultsappeartohaveastrongbearingonthestructureofthepotentialenergysurfacesoftheintermediateCH2CO.Apossiblephotolysisme-chanismisproposedtoexplaintheseexperimentalresults.

简介：Baiyuneboite-(Ce)isanewfluor-carbonatemineral.Basedonthefinedataonthestructureofthemineral,thefactorgroupandnormalcoordinateanalysesforitsinfraredspectrumhavebeencarriedout.ThefactorgroupanalysesindicatethatthesitegroupandfactorgroupsplittingsoftheinternalvibrationbandsofCO3^2-ionsdonotoccurandthatthedoublebandsofnormalmodesresultfromtwonon-equalsetsofCO3^2-ionsinthecrystalstructure,Thenormalcoordinateanalysesgivethestretchingforceconstants.bendforceconstantsandcalculatedfrequenciesofCO3^2-ions.Thecalculationsofpotentialenergydistributionallowustoassignv3andv4tothestretchingvibrationandthebendvibrationofCO3^2-ions.respectively.

简介：Theoreticalresultsofnormalcoordinateanalysisofpolybenzamideperformedwithtwoconformationalisomerizedmodels,thecistransandtheall-transconformation,havebeenadoptedtoexamineanumberofinfraredspectraoffilmsofthepolymertreatedinasubsequentannealingprocessandacoolingprocess.Itshows,inthisinvestigation,thattwosetsofinfraredspectralprofilesaround1400cm-1and900cm-1behavequiteattractively.Theirspectralbehaviourshavebeencorrelatedtotheconformationaldefectvariationinsamples,andreasonablypredictedbythenormalcoordinatecalculation.

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简介：Asmid-infrared(MIR)lasersshownumerousapplicationsinthefieldofdefense,medical,materialsprocessing,andopticalcommunications.InvestigationonMIRRamanfiberlasers(RFLs)increasinglybecomesahottopic.Comparedwiththetraditionalsilicafibers,fluorideandchalcogenideglassfiberspossesshighernonlinearcoefficientsandexcellentMIRtransmittances.Inthisarticle,thelatestdevelopmentsoftheMIRRFLsusingfluorideandchalcogenideglassfibersasgainmediaareintroduced,respectively.ThisreviewarticlemainlyfocusesonthedevelopmentsofMIRRFLsinaspectsofoutputwavelength,outputpower,andopticalefficiency.Besides,theprospectofMIRRFLsisalsodiscussed.

简介：光读出uncooled红外线的察觉者，与沥青尺寸60m采用一个没有底层的焦点的飞机数组，被建立。双性人层结构错配的压力导致的反射镜变丑被讨论，接着，决定光读出敏感和最佳的过滤器位置的一个通用答案被发现。由使用这个答案，为飞机反射镜能理论上作为与常规操作相比增加80%的理想的光读出敏感，和敏感损失也由反射镜变丑罐头引起了被归结为合理水平。

简介：Weproposeimprovedmultilevelfilters(IMLFs)involvingtheabsolutevalueoperationintothealgorithmicframeworkoftraditionalmultilevelfilters(MLFs)toimprovetherobustnessofinfraredsmalltargetenhancementtechniquesunderacomplexinfraredclutteredbackground.Comparedwiththewidelyusedsmalltargetenhancementmethodswhichonlydealwithbrighttargets,theproposedtechniquecanen-hancetheinfraredsmalltarget,whetheritisbrightordark.Experimentalresultsverifythattheproposedtechniqueisefficientandpractical.

简介：Mid-infrared(mid-IR)lasers,generallydefinedashavinganoperationwavelengthinthespectralregionof2μmto20μm,haveattractedgreatscientificandtechnologicalinterestsowingtotheirwidespreadapplications.Thiswavelengthrangenotonlycontainssome

简介：Aninfraredreal-timeimagingsystemusingDSP(digitalsignalprocessor)asthekernelofdigitalsignalprocessingboardispresented.Inthissystem,theimagingdifferenceandnonuniformitycorrectionmethodisdevelopedonthechiptakingadvantageofDSPwithhighspeed.Themethodcombineshardwareandsoftwaretogether,sothatthedifficultyforrealizingsuchamethodwithotherhardwarecanbeovercome.

简介：［1］S.Jin,T.H.Tiefel,M.McCormack,etal.:Sci-ence,264(1994),p.413.［2］R.vonHelmolt,J.Wecker,B.Holzapfel,etal.:Phys.Rev.Lett.,71(1993),p.2331.［3］Y.Shimakawa,Y.Kubo,T.Manako:Nature,379(1996),p.53.［4］C.Zener:Phys.Rev.,82(1951),p.403.［5］A.J.Millis,P.B.Littlewood,B.I.Shraiman:Phys.Rev.Lett.,74(1995),p.5144.［6］A.J.Millis,B.I.Shraiman,R.Mueller:Phys.Rev.Lett.,77(1996),p.175.［7］D.Louca,T.Egami,E.L.Brosha,:Phys.Rev.B,56(1997),p.8475.［8］G.Zhao,K.Conder,H.Keller,etal.:Nuture,381(1996),p.676.［9］C.H.Booth,F.Bridges,G.J.Snyder,etal:Phys.Rev.B,54(1996),p.15606.［10］K.H.Kim,J.Y.Gu,H.S.Choi,etal.:Phys.Rev.Lett.,77(1996),p.1877.［11］S.Zhou,G.Zhou,Y.Zhang:Jpn.J.Appl.Phys.,38(1999),p.5075.［12］S.Tajima,A.Masaki,S.Uchida,etal.:J.Phy.C:SolidStatePhys.,20(1987),p.3469.［13］L.M.Rodriguez-Martinez,J.P.Attfield:Phys.Rev.B,58(1998),p.2426.

简介：Wehaveanalyzedtheorder-disorderingvarianceduetoresonanceeffectandthenonlinearbehavioroffarinfraredraylaser(FIRL)-biologicalsysteminteraction.TheanalyticresultsshowthattheinteractionbetweenthelivingbiologicalsystemandFIRLcanproduceresonanceexcitationeffect,andsotheoriginalhighorderedstateofthesystemcanbedestroyedandthustheconformationvariationinthesystemcanbeproducedunderfurtheractionofthelaser.Inaddition,wehaveanalyzedthenonlinearpropertiesoftheFIRLbio-moleculeinteractionandexplainedthemutagenesiseffectsofFIRL.ThetheoreticanalysisisconsistentwiththeresultsofFIRLmutagenesisbreedingtest.

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简介：Micro-bolometerpixelisanessentialelementintheinfraredfocalplanearray(IRFPA)ofinfrareddetectors.Itsresponsetoinfraredradiationisanalyzedinthispaper.Thepixelstructureismodeledasacompositelaminatethinplatewhosesidesaremeasuredwiththethicknessfrom0.1-1μm.Itsmiddleplyisaferroelectricthinfilm.Itstopsurfaceiscoveredwithagoldorplatinuminfraredabsorber,whilethebottomsurfaceisdepositedwithplatinumorlanthanum-nickel.Meanwhilebothsurfacesareapairofelectrodes.Thetopsurfacereceivesinfraredradiationpulsessuccessively.Fortheverytinymicrobolometerpixel,itisassumedthattheinfraredradiationisuniformlydistributedontheplate.Furthermore,astheratioofthesidelengthtothethicknessoftheplateisdramaticallylarge,itisassumedthatheattransferonlytakesplaceacrossthethicknessoftheplate.Thethermal-electric-mechanicalcouplinggoverningequationsaresolvedinaformofFourierseries.Resultsofthedisplacement,temperaturevariationandelectricoutputsignalsofthemicrobolometerpixelstructureunderinfraredradiationareobtained,analyzedandcomparedwithexperimentaldata.

简介：为使320×凉下来有盯的焦点的飞机数组的240察觉者，新奇中间红外线一个热光系统被介绍。系统由5个球形的透镜组成。透镜的材料是硅和金者。光参数和调整转移功能(MTF)被调查。系统有衍射从−30°C的有限图象质量和到70°C的稳定的图象飞机。系统的典型参数如下：4的f/number，100%的冷盾效率，3.74.8μm的光谱区域和80%的transmissivity。系统简单结构的优点，低价格，和它对用机器制造容易。

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