简介：TheRamanspectraofthenaturalendmembersofthegarnet-groupminerals,whichincludepyrope,almandineandspessariteofFe-Algarnetseriesandgrossularite,andraditeanduvaroviteofCa-Fegarnetseries,havebeenstrdied.MeasuredRamanspectraofthesemineralsarereasonablyandqualitativelyassignedtotheinternalmodes,translationalandrotatorymodesofSiO4tetrahedra,aswellasthetranslationalmotionofbivalentcationsintheXsite.ThestretchandrotatoryA1gmodesfortheFe-AlgarnetseriesshowobviousRamanshiftsascomparedwiththosefortheCa-Fegarnetseries,owingtothecationsresidingintheXsiteconnectedwithSiO4tetrahedrabysharingthetwoedges.TheRamanshiftsofallmemberswithineitheroftheseriesareattributedmainlytothepropertiesofcationsintheXsitefortheFe-AlgarnetseriesandintheYsitefortheCa-Fegarnetseries.

简介：Theso-called＂phasedifference＂iscommonlyintroducedasaphenomenologicalparameterinRamantensortheory,soastofittheexperimentaldatawell.Althoughphasedifferenceiswidelyrecognizedasanintrinsicpropertyofcrystals,itsphysicsstillremainsambiguous.Recently,Kranertetal.havepresentedanewformalismtoexplaintheoriginofphasedifferencetheoretically.Here,wesystematicallyconductedexperimentalresearchwithpolarphononsinwurtzitecrystals,theresultsofwhichstronglysurestthatthephasedifferenceshouldbepredeterminedinaRamantensor,ratherthanbetreatedasRamantensorelementstraditionallyorasanintrinsicproperty.OnthegroundsofpinpointingexistinglogicalflawsinRamantensorstudy,weprovidealogicallyclearparadigm.

简介：TheangledependenceofopticalphononmodesofanAlNbulksinglecrystalfromthem-plane（1100）andc-plane（0001）surfaces,respectively,isinvestigatedbypolarizedRamanspectroscopyinabackscatteringconfigurationatroomtemperature.CorrespondingRamanselectionrulesarederivedaccordingtomeasuredscatteringgeometriestoillustratetheangledependence.Theangle-dependentintensitiesofphononmodesarediscussedandcomparedtotheoreticalscatteringintensities,yieldingtheRamantensorelementsofA1（TO）,E22,E1（TO）,andA1（LO）phononmodesandtherelativephasedifferencebetweenthetwocomplexelementsofA1（TO）.Furthermore,theRamantensorofwurtziteAlNiscomparedwiththatofwurtziteZnOreportedinpreviouswork,revealingtheintrinsicdifferencesoflatticevibrationdynamicsbetweenAlNandZnO.

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

简介：TheRamanspectrafromleukemiccellline（HL60）andnormalhumanperipheralbloodmononuclearceils（PBMCs）areobtainedbyconfocalmicro-Ramanspectroscopyusingnear-infraredlaser（785nm）excitation.Thescanningrangeisfrom500to2000cm-1.ThetwoaverageRamanspectraofnormalPBMCsandcarcinomacellshavecleardifferencesbecausetheirstructureandamountofnucleicacid,protein,andothermajormoleculesarechanged.Thespectraarealsocomparedandanalyzedbyprincipalcomponentanalysis（PCA）todemonstratethetwodistinctclustersofnormalandtransformedcells.Thesensitivityofthistechniqueforidentifyingtransformedcellsis100%.更多还原

简介：Theobjectiveofthestudywastoelucidateopticalcharacteristicsofthechromophorestructuresoffluorescentproteins.RamanspectraofcommonlyusedGFP-likefluorescentproteins(FPs)withdiverseemissionwavelengths(green,yellow,cyanandred),includingtheenhancedhomogenousFPsEGFP,EYFP,andECFP(fromjellyfish)aswellasmNeptune(fromseaanemone)weremeasured.High-qualityRamanspectrawereobtainedandmanymarkerbandsforthechromophoreoftheFPswereidentifiedviaassignmentofRamanspectrabands.WereportthepresenceofapositivelinearcorrelationbetweentheRamanbandshiftofCs=C6andtheexcitationenergyofFPs,demonstratedbyplottingabsorptionmaxima(cm-1)againstthepositionoftheRamanbandCs=C6inEGFP,ECFP,EYFP,theanionicchromophoreandtheneutralchromophore.ThisstudyrevealednewRamanfeaturesinthechromophoresoftheobservedFPs,andmaycontributetoadeeperunderstandingoftheopticalpropertiesofFPs.

简介：NormalHamanSpectra(NRS)ofsolidPMT(1-phenyl-5-mercaptotetrazole)andMBT(2-mercaptobenzothiazole)andtheirsurfaceenhancedRamanspectra(SERS)adsorbedonthesurfaceofthesilversubcolloidalparticlesarereportedandcompared.ItissupposedthatPMTadsorbedonsilverwithbothNandSatomswhereasMBTmaybeadsorbedonsilverthroughSatom.

简介：Ramanspectroscopyisaversatiletoolwidelyusedforcomprehensiveprobingofcrystalinformation.However,generallywhenappliedinnarrow-band-gapvanderWaalscrystals,itisliabletoforma'bug,'especiallyintransition-metal-dichalcogenides(TMDs).Thatis,severalresonantRaman-scattering(RS)modeswillinevitablyappearintheRamanspectrawithstrongintensity,interferingwiththedesiredsignalofoptical-phononmodes.Here,weproposecross-sectionalpolarizedRamanscatteringcapableofregulatingtheintensityofRSmodesinaccordancewithquasi-sinusoidalrules.Typically,forMoS2andWS2,whenthepolarizationvectorofexcitedlightisalongthecaxisofthecrystal,allRSmodesarenearlycompletely'expunged'fromtheRamanspectra.ThemechanismisthattheabsorptionofmostTMDswithaspacegroupofR3mforthelightpolarizedalongthecaxisisinfinitesimal,thusformingasmallcouplingintensityofelectronicstatesexcitedopticallyandacoustic-phononmodesatpointM,whichinturnrestraintheappearanceofRSmodes.TheregulatingstrategyproposedcanbeappliedtoothervanderWaalscrystalssoastoobtainahighsignal-to-noiseratioRamanspectrum.

简介：材料，体积或平面波导的有弹性、震动的性质，被Brillouin和拉曼光谱学学习在眼镜陶艺跟随nanocrystals生长的过程。nanoparticles原因外观在低频率拉曼光谱，典型山峰，谁的放，取决于晶体的尺寸。同时，由于光声子，锋利的水晶山峰出现在拉曼系列，允许起核心作用的阶段，和Brillouin山峰的频率移动的决心被观察。CLC数字TB383现在的工作与MIUR-FIRBRBNE012N3X的金融支持部分被资助了，MIURPRIN，轻拍FAPVU2004鈥?006。

简介：调查在上植入Ge在氨下面轧了由MOCVD成年然后在1100点退火的电影周围被执行了。与增加Ge培植剂量，四座另外的山峰在260的波浪数字产生，314，428并且在Ramam系列的670cm-1。在PL系列，与在2.66eV和黄乐队集中的PL乐队相比的乐队边排放的相对紧张随植入Ge的剂量的增加减少。260的模式和314cm-1被归因于散布的激活混乱的拉曼，而428的模式和670cm-1被分到空缺和空缺相关的建筑群的本地颤动。在2.66eV和黄乐队集中的PL乐队也与这些空缺缺点有关。在为样品的301cm-1的新拉曼山峰退火了仅仅5min由于缺乏的退火从Ge簇发源。

简介：A31kmlongrangedistributedopticalfiberRamanphotontemperaturesensor(DOFRPTS)systemhavebeendevelopedbasedontemperatureeffectoftheamplifiedspontaneousRamanscatteringinfiber,andusingfiberlaserasapumpedsource.Theresultsshowthattemperaturemeasuringuncertaintyis±2°C,temperatureresolutionis0.1°C,measurementtimeis432s,spatialresolutionislessthan4m.

简介：Aclearlight-yellowsilversolwhichhasthevisiblespectralabsorptionat390nm,whenadsorbedphenylmercaptotetrazole(PMT)ormercaptobenzothiazole(MBT),hasanewabsorptionat510-550nm.ItwasfoundthattheadsorptionofhalideionscompeteswithPMTandMBT.However,halideionshaveacompletelydifferentinfluencefromPMTandMBTonthespectralabsorptionofthesilversol.Thedifferencesmayresultfromthechangeofthepropertiesofthesurfaceofthesilversubcolloidalparticlesandfromthebondformscombiningadsorbateswiththesubstrates.

简介：Thestructureanddynamicsofelectrode/liquidinterfacesplayanincreasinglyimportantroleinelectrochemistry.Ramanspectroscopyiscapableofprovidingdetailedstructuralinformationatmolecularlevelandnewinsightintotheinterfacialstructure,adsorption,reaction,electrocatalysisandcorro-sion.InthisaccountwewillsummarizesomeprogressesofsurfaceRamanspectroscopyinthestudyofelectrochemicalinterfaces,mainlybasedonourgroup’swork,layingemphasisonthedetectionsensitivity,spectralresolution,timeresolutionandspatialresolutionaswellasthehyphenatedtechnique.

简介：TheStokesspectruminthestimulatedRamanscattering(SRS)isverycomplicated.Inthisarticle,weusebothGaussianandLorentzapproximationtoinvestigatethegainpropertiesofmulti-pumpingbroadbandRamanamplifier,andpresentsomeschemesforflatteningthegain.Alltheresultsshowthattheflatnessofthegainspectrumiscloselyrelatedtothepumpingfrequencygrid.ByresearchingthegainpropertiesofRamanamplifiersofsuchITU-TfibersasG.652,G.653,G.655andlargeeffectiveareanon-zerodispersionflatteningfiber,wefindthattheRamangainisassociatedwiththefibertypeanditstransmissioncharacteristics,especiallyitdecreaseswiththeincreaseoftheeffectivecorearea.

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简介：影响在噪音特征上由拉曼效果导致了一弄空并且有损耗的双泵纤维光参量的放大器(FOPA)被调查。考虑拉曼效果，修改联合振幅方程第一被造，然后，拉曼的影响在Stokes和反上完成--司烧有不同起始的信号力量的波长进一步被分析。而且，FOPA获得上的效果也与一样的起始的信号力量和经常的噪音数字(NF)被显示出。

简介：Weinvestigatetheopticalbistabilityandmultistabilitybehaviorsinaclosedthree-levelΛ-typeatomicsystem.Byaddingasidebandoneitherhandofthetransitionswhichareoriginallycoupledbyacoherentcontrolfieldandacoherentprobefieldtodisturbthetwo-photonresonance,bistabilityoccursduetotwo-channelinterference.IncreasingthesidebandRabifrequencyleadstotheswitchingfrombistabilitytotristability.Whenthesidebandsimultaneouslycoupleswithbothhands,wecaneasilyobtainquadrastability.

简介：Alow-thresholdRamaneffectinakilowattytterbium-dopednarrowbandfiberamplifiersystemisreported.TheRamanStokeslightat1120nmisachievedwiththetotaloutputpowerofonly~400W,indicatingthattheRamanthresholdofthiskilowattcodirectionalpumpedcontinuouswavefiberamplifierismuchlowerthanthepredictedvalueestimatedbytheclassicformula.Tofigureoutthemechanismofthisphenomenon,simulationsbasedonthegeneralstimulatedRamanscattering(SRS)modelareanalyzedindicatingthatthekeyfactoristhecouplingbetweenfour-wavemixing(FWM)andSRS.Thesimulationresultsareingoodagreementwithourexperiments.

简介：WesystematicallyinvestigatetheopticalpropertiesoftheInP1-xBixternaryalloyswith0≤x≤2.46%,byusinghighresolutionpolarizedRamanscatteringmeasurement.BothInP-likeandInBi-likeopticalvibrationmodes（LO）areidentifiedinallthesamples,suggestingthatmostoftheBi-atomsareincorporatedintothelatticesitestosubstitutePatoms.AndtheintensityoftheInBi-likeRamanmodeispositivelyproportionaltotheBi-content.Linearred-shiftoftheInP-likelongitudinalopticalvibrationmodeisobservedtobe1.1cm-1/Bi%,whilethatoftheInP-likeopticalvibrationovertone（2LO）isnearlydoubled.Inaddition,throughcomparingthe（XX）andZ（XY）Ramanspectra,longitudinaloptical-plasmon-coupled（LOPC）modesareidentifiedinallthesamples,andtheirintensitiesarefoundtobeproportionaltotheelectronconcentrations.

简介：Mitoxantrone,aclinicallyusefulantitumourantibioticforleukaemiaandbreastcancer,hasreceivedmoreattentions.Inthispaper,theinteractionbetweenmitoxantroneandcalfthymusDNAisinvestigatedbyRamanandfluorescencespectroscopies,andthebindingsiteofmitoxantronetocalfthymusDNAisexplored.TheresultsshowedthatmitoxantroneinteractswithcalfthymusDNAbasesbytheintercalationofanthracyclineintothebasepairplaneofadenine(A)andthymine(T),anditresultsinthedisruptionofthehydrogenbondsbetweencalfthymusDNAbases,andthusthecalfthymusDNAdouble-strandcanbedisruptedintotheB-formDNAdouble-strandsegments.