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1、中国科技论文在线http://www.paper.edu.cnPhotoassociationspectroscopyofNaCsmolecularlong-range#statesbelowthe(3S1/2)+(6P3/2)limit**5LIUYanyan,WUJizhou,XIAOLiantuan,MAJie,JIASuotang(StateKeyLaboratoryofQuantumOpticsandQuantumOpticsDevices,InstituteofLaserSpectros
2、copy,CollegeofPhysicsandElectronicsEngineering,ShanxiUniversity)Abstract:Inthispaper,wepresenthighresolutionphotoassociationspectroscopyofNaCsmoleculesinlong-rangestatebelowtheNa(3S1/2)+Cs(6P3/2)asymptote.TheexcitedstateNaCsmoleculesare10producedbyphot
3、oassociationofultracoldNaandCsatomsinadual-speciesmagneto-opticaltrap.TraplossspectroscopyoftheultracoldpolarNaCsmoleculesformedbyphotoassociation,hasbeenexperimentallyobtainedbyusinghighlysensitivemodulationspectroscopytechnique.PAspectrocopy3+forcΣst
4、atecorrelatedtoNa(3S1/2)+Cs(6P3/2)asymptoteisdemonstratedandthebindingenergiesofthemolecularlevelsareprovided.15Keywords:HeteronuclearBi-alkaliMolecules;Photoassociation;High-resoulationSpectroscopy0IntroductionUltracoldpolarmoleculeshaverecentlydrawnc
5、onsiderableattentions[1–20]owingtotheirintrinsicpermanentelectricdipolemoments(EDM),whichallowthemtointeractstronglyinthe20presenceofelectricfields.Inaddition,theanisotropiclongrangedipole-dipoleintermolecularinteractionshavemadethesesystemseasilymanip
6、ulatedthroughexternalelectricormagneticfieldswithenhancedprecision[1],providingexcitingnewresearchesinthefieldsofquantumchemistry[2,3],quantumsimulation[4,5],precisionmeasurements[6,7],andquantuminformation[8].25Heteronuclearbi-alkalimolecules,haverece
7、ntlyreceivedparticularinterestmainlybecausetheconstituentalkaliatomsareeasytolasercoolandassociattoformmoleculesatultracoldtemperatures.Variousapproaches[9–14]toproduceultracoldmoleculeshavebeenproposedandrealized,amongwhichtheindirectmethodsofassembli
8、ngmoleculesfromlaser-cooledatomse.g.,photoassociation(PA)andFeshbachresonancehavebeenwidelyused.PAofultracoldatomsis30oneofthemostefficienttechniquestoobtainheteronuclearbi-alkalimolecules[15–20].PAhasproventobeanimportanttechniquetopro
