采用空心金屬波導(dǎo)的原子導(dǎo)引及其空心光束的產(chǎn)生.pdf

1、華東師范大學(xué)碩士學(xué)位論文采用空心金屬波導(dǎo)的原子導(dǎo)引及其空心光束的產(chǎn)生姓名：代萌申請學(xué)位級別：碩士專業(yè)：光學(xué)指導(dǎo)教師：印建平20050501AbstractThemethodsforlaserandmagnetguidingofneutralatomsincludered—detunedlaserguiding，biueddetunedlaserguiding，currentcarryleadguiding，currentcarrycon

2、ductorguidingandpermanentmagnetatomicguidingarebrieflyintroducedinthispaperwealsointroducedthedefinitionofatomicfiumelanditsbasicprincipleandgeneration，finallythepotentialapplicationsofatomicfimnelinatomopticsarediscusse

3、dWeproposedanewschemetoguidecoldatomsusingablue—detunedTE01doughnutmodeinahollowmetallicwaveguide@10microns)，itinvolvedtheadvantagesofbothblue—detunedlaseratomicguidinghollowfiberatomicguidingWecalculatedtheelectromagnet

4、icfielddistributionoftheguidingmodesinthehollowmetallicwaveguide，discussedthemodeattenuationcharacteristicinwaveguidesofdifferentmediaandradius，andfindthemethodtorestrainothermodes’propagation：modematchingandchoosingther

5、ightmediatoincreasetheEHl1mode。sattenuation。FortheTE01modewhichisrepresentedbythefistkindBesselfunction，wecalculateditsopticintensitydistribution，thencalculatedtherelationshipbetweenitsopticalpotentialforthetwo—level85Rb

6、atomsandthedetaning，andestimateitsphotonscatteringrateWefindthattheopticaIpotential(U。。=570inK)oftheTE01modeishighenonghtoloadcoldatoms(120／tK)fromastandardmagneto—opticaltrapandguidethemintheHMWandthephotonscatteringrat

7、eisSOlowthatCanbeneglectItprovedthatourschemeisdesirabletealizeacomputercontrolledatomlithographywitllanarbitrarypattemDiffractednealandfarfielddistributionsoftheTE0tmodeoutputbeamundertheFresnelapproximationarestudiesWe

8、findtheoutputbeamisadarkhollowonewhichCanbeanalyzedbythepattemofaTEM01donutmodeWhenwepayattentiontothenear—field，wefindthatthebeamwillbefocusedbyitselfinashortpropagationdistance，fora20一micron—radiushollowwaveguide，thefo