简介：WebuildaZeemanslowerwithconsecutivecoilsanduseittoloadanYbmagneto-opticaltrap(MOTs).CoolingefficiencyismeasuredbythefluorescenceintensityoftheatomiccloudtrappedbytheMOT.Anoptimizedmagneticfieldprofilecanacquirethemaximumcoolingefficiency,correspondingtoagoodcompromisebetweenthesmallermagneticfieldmismatchandthehighcapturevelocity.OurstudiesprovideusefulinformationonhowtheperformanceoftheZeemanslowercanbeimproved.

简介：Photoniccrystalfibers(PCFs)withasteppedraised-coreprofileandonelayerequallyspacedholesinthecladdingareanalyzed.Usingeffectiveindexmethodandconsideringaraisedsteprefractiveindexdifferencebetweentheindexofthecoreandtheeffectiveindexofthecladding,weimprovethecharacteristicparameterssuchasnumericalapertureandV-parameter,andreduceitsbendinglosstoaboutonetenthofaconventionalPCF.ImplementingsuchastructureinPCFsmaybeonestepforwardtoachievelowlossPCFsforcommunicationapplications.