简介：Exoticquantumspinliquid(QSL)statesandfractionalizedquasiparticlesinfrustratedmagnetsareofmuchcurrentinterestintheoreticalandexperimentalstudiesofquantummagnetism.Thekagome-latticeHeisenbergantiferromagnet(KAFM)providesapossiblerealizationofjustsuchnoveltopologicalstatesofmatter.ThekagomelatticeshowninFig.1isoneofelevenArchimedeanlatticesintwospatialdimensions,wherethewordkagomeitselfmeansuweavepattera"inJapanese.

简介：Inthispaper,theinfluenceofvariousboundaryconditionsonthefrequencyresponseofthreelayeredplatesisanalysedusinghigherordertheoryofsheardeformation.ThefacesheetsarelaminatedorthotropiccompositebasedonMindlintheory(orFSDT).UtilisingmethodofenergyandprincipleofHamilton,theequationsofmotionareobtainedconsideringcontinuityboundaryconditionsbetweenlayers.Themodeshapesandfrequencyoftheplatearecalculatedapplyingmethodofdifferentialquadrature(DQM).

简介：Weexperimentallydemonstratetwokindsofallfew-modefiber(FMF)ringlaserswithhigh-ordermode(HOM)oscillationinthelasercavity.Onekindisaswitchable-wavelengthall-FMFHOMlaserwithanoutputoftunableopticalvortexbeams(OVBs);theotherisaQ-switchedall-FMFHOMlaserwithanoutputofpulsedcylindricalvectorbeams(CVBs).Thelasersarecomposedofall-FMFcomponentsandfew-modeerbium-dopedfiber.ASagnacinterferometermadeofa3dBFMFcouplerfunctionsasthewavelengthselector,andswitchablemultiwavelengthtunableOVBsareexperimentallyrealized.Carbonnanotube-basedsaturableabsorbersandthenonlinearpolarizationrotationtechniqueareusedtoachieveQ-switchedCVBlasers.Thisisthefirstreport,toourknowledge,onthegenerationofswitchable-wavelengthandQ-switchedHOMbeamsinall-FMFlasercavities.