简介：Theinfluenceofairgapsontheresponseoftransmissionforatransverse-electricmodeparallel-platewaveguide(TE-PPWG)withasinglecavityanddoublecavitieshasbeenstudiedexperimentally.Astheairgapislargerthantheresonantwavelengthofhighordercavitymodeinthesingledeepgroovedwaveguide,onlythefundamentalcavitymodecanbeexcitedandsingleresonancecanbeobservedinthetransmissionspectrum.Basedonaboveobservations,atunablemultibandterahertz(THz)notchfilterhasbeenproposedandthevariationofairgaphasturnedouttobeaneffectivemethodtoselectthebandnumber.Experimentaldataandsimulatedresultsverifythisbandnumbertunability.Thismechanicalcontrolmechanismforelectromagneticinducedtransparency(EIT)willopenadoortodesignthetunableTHzdevices.

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简介：Naturalandventilatedcavitationsgeneratedonasmooth-nosedaxisymmetricbodywerestudiedexperimental-ly.Thecharacteristicsofsmallscaleandlocalizedfluctuationsof'steadycavities'weremeasuredbypressuretransducers.Comparisonsbetweennaturalandventilatedcavitiesatdiffer-entmeasuredpointsforseveralcavitationnumbersweredone.Itwasobservedthatthedominantfluctuationswereconcen-tratedinthefrequencyrangeofOHz-50Hzforallthecavitati-oncases,Similarshapesandmagnitudesofthefrequencyspectraweredetectedforbothnaturalandventilatedcavities.Muchlargerspectralamplitudeinthecavityclosureregionsuggestedasfluctuationssource.Frompartialcavitatingflowtosupercavitatingflow,thedominatfrequencyandthecorre-spondingamplitudedecreasedwithdecrasingcavitationnum-ber,whichmeantthatcavitybecamemoresteadywhiledevel-oping.

简介：在洞量electrodynamics(证完)的上下文，一个潜在的计划被建议产生纠缠的协调状态。计划与洞包括二水平的原子的相互作用两次。在第一个相互作用，二个原子分别地与大detuning被送到一个微波洞。然后第二个相互作用是二个原子进入另一个微波洞并且被反响的古典地同时驾驶。当我们选择合适的相互作用时间并且在二个原子上做测量时，二块微波洞模式地determinatively被纠缠。另外，概括计划到多洞和多原子是容易的。

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简介：Weproposeaschemeforteleportationoffour-levelatomicstatesinthermalcavities.TheschemedoesnotinvolvethegeneralizedBell-stateorgeneralizedGHZ-statemeasurement,whichisdifficultinpractice.Anotherfeatureoftheschemeisthatitdoesnotrequireindividualaddressingofatomsincavityandisinsensitivetobothcavitydecayandthermalfield,whichisofimportanceinpointofexperiment.

简介：Inthispaper,ananalyticmethodisdevelopedtoaddresssteadySH-wavescatteringandperformdynamicanalysisofmultiplecircularcavitiesinhalfspace.ThescatteredwavefunctionusedforscatteringofSH-wavesbymultiplecircularcavities,whichautomaticallysatisfiesthestress-freeconditionatthehorizontalsurface,isconstructedbyapplyingthesymmetryoftheSH-wavescatteringandthemethodofmulti-polarcoordinatessystem.Applyingthisscatteredwavefunctionandmethodofmovingcoordinates,theoriginalproblemcanbetransformedtotheproblemofSH-wavescatteringbymultiplecircularcavitiesinthefullspace.Finally,thesolutionoftheproblemcanbereducedtoaseriesofalgebraicequationsandsolvednumericallybytruncatingtheinfinitealgebraicequationstothefiniteones.Numericalexamplesareprovidedforcasewithtwocavitiestoshowtheeffectofwavenumber,andthedistancesbetweenthecentersofthecavitiesandfromthecenterstothegroundsurfaceonthedynamicstressconcentrationaroundthecavityimpactedbyincidentsteadySH-wave.

简介：Wedescribeanoveltechnique,lowsurfaceenergyGasExpansionMolding(GEM),tofabricatemicrobubblearraysinpolydimethylsiloxane(PDMS)whichareincorporatedintoparallelplateflowchambersandtestedincellsortingandmicrocellcultureapplications.Thisarchitectureconfersseveraloperationaladvantagesthatdistinguishthistechnologyapproachfromcurrentlyusedmethods.HereinwedescribetheGEMprocessandtheparametersthatareusedtocontrolmicrobubbleformationandaVacuum-AssistedCoating(VAC)processdevelopedtoselectivelyandspatiallyalterthePDMSsurfacechemistryinthewellsandonthemicrochannelsurface.WedescriberesultsfrommicroflowimagevisualizationstudiesconductedtoinvestigatefluidstreamsaboveandwithinmicrobubblewellsandconcludewithadiscussionofcellculturestudiesinPDMS.

简介：ThedevelopmentoftheHalfWaveResonator(HWR010)isbasedontheChinaADSproject.TheHWR010operatesat162.5MHzandcanprovidemorethan0.78MVofacceleratingvoltagepercavityforprotonwithopt=0.10.ThegoaloftheRFpropertiesistogetalowerheatloadandahigheracceleratinggradient,whicharedeterminedbyahigherR/Q0andlowerpeaksurfacefields(Bpk/EaccandEpk/Eacc).InordertooptimizetheHWRgeometryparameters,CST-MWSisusedtoconducttheRFsimulation.TheoptimizedRFparametersareshowinTable1.

简介：我们在场在多重洞纠缠域的一个计划。我们的计划基于Ξ-的反响的相互作用与洞地forprecalculated相互作用时间打三水平的原子，它使我们能产生量entangledGreenberger-Horn-Zeilinger(GHZ)在多重洞的地的状态。原则上，计划能也被概括产生N聚会GHZ状态。要求的试验性的技术在能在建立的微波洞证完被获得的范围以内。

简介：Reflectorsareanessentialcomponentforon-chipintegratedphotonics.Here,weproposeanewmethodfordesigningreflectorsontheprevalentthin-film-on-insulatorplatformbyusinggenetic-algorithmoptimization.Insimulation,thedesignedreflectorwithafootprintofonly2.16μm×2.16μmcanachieve~97%reflectivityand1dBbandwidthaswideas220nm.Thestructureiscomposedofrandomlydistributedpixelsandishighlyrobustagainsttheinevitablecornerroundingeffectindevicefabrication.Inexperiment,wefabricatedon-chipFabry–Perot(FP)cavitiesconstructedfromoptimizedreflectors.ThoseFPcavitieshaveintrinsicqualityfactorsof>2000withthehighestvaluebeyond4000inaspectralwidthof200nm.ThereflectivityfittedfromtheFPcavityresonancesis>85%intheentirewavelengthrangeof1440–1640nmandisbeyond95%atsomewavelengths.ThefabricationprocessesareCMOScompatibleandrequireonlyonestepoflithographyandetch.Thedevicescanbeusedasastandardmoduleinintegratedphotoniccircuitryforwideapplicationsinon-chipsemiconductorlaserstructuresandopticalsignalprocessing.

简介：Fieldemissionoccurredinsuperconductingradio-frequency(SRF)cavitiesisthemajorobstacleoftheacceleratorsoperatingathighgradient,whichpartlycausedbytheinnersurfacecontamination,suchasthehydrocarbonsandtheabsorbedresidualgas.Theplasmaprocessingcanbeaneffectivemethodtosolvethefieldemissionissues.Thepropertiesoflowtemperatureglowdischarge,whichwasargonplasmawiththechemicallyreactiveoxygen,wereinvestigatedfortheSRFcavitiesusedforCADSproject.

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.

简介：WesuggesttwoschemestogeneratetheWstateofNA-typethree-levelatoms.Intheschemes,identicalNthree-levelatomsaretrappedinacavityorNdistantcavities.ThesuccessorfailureofthegenerationoftheWstatecanbedeterminedbydetectingthepolarizationofphotonleakingoutofthecavity.TheresultdemonstratesthattheWstateisfreefromboththecavitylossandthespontaneousemissionduetothefactthatthetwogroundstates(leftandright)ofthethree-levelatomsarestablestates(ormetastablestates).

简介：Thetunablemultipleplasmon-inducedtransparency(PIT)effectisinvestigatednumericallyinametal-insulator-metal(MIM)waveguidewiththreeside-coupledrectangularresonators.Thesystemexhibitsdual-modePITeffectsinthevisibleandnear-infraredregions.Byadjustingthegeometricalparametersofthestructure,wecanmanipulatenotonlyeachsinglePITwindow,butalsothedoublePITwindowssimultaneously.Ourstructuresmayhavepotentialapplicationsforopticalcommunication,integratedoptics,andopticalinformationprocessing.Thefiniteelementmethod(FEM)illustratesourtheoreticaldesign.

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简介：Basedonthecouplingoftwodistantthree-levelatomsintwoseparateopticalcavitiesconnectedwithtwoopticalfibres,schemesonthegenerationofseveraltwo-qubitlogicgatesarediscussedundertheconditionsof△=δ-2νcosπk/2g/2andν～g.Discussionandanalysisofthefidelity,gatetimeandexperimentalsetupsshowthatourschemesarefeasiblewithcurrentopticalcavity,atomictrapandopticalfibretechniques.Moreover,theatom-cavity-fibrecouplingcanbeusedtogenerateanN-qubitnonlocalentanglementandtransferquantuminformationamongNdistantatomsbyarrangingNatom-cavityassemblagesinalineandconnectingeachtwoadjacentcavitieswithtwoopticalfibres.

简介：Weproposeandexperimentallydemonstratea2×2thermo-optic(TO)crossbarswitchimplementedbydualphotoniccrystalnanobeam(PCN)cavitieswithinasilicon-on-insulator(SOI)platform.Bythermallytuningtherefractiveindexofsilicon,theresonancewavelengthofthePCNcavitiescanbered-shifted.WiththehelpoftheultrasmallmodevolumesofthePCNcavities,only～0.16mWpowerisneededtochangetheswitchingstate.Withaspectralpassbandof0.09nmatthe1583.75nmoperationwavelength,theinsertionloss(IL)andcrosstalk(CT)performancesweremeasuredasIL(bar)=-0.2dB,CT(bar)=-15dB,IL(cross)=-1.5dB,andCT(cross)=-15dB.Furthermore,thethermaltuningefficiencyofthefabricateddeviceisashighas1.23nm/mW.

简介：Thispaperstudiesthree-dimensionaldiffractionofobliquelyincidentplaneSHwavesbytwininfinitelylongcylindricalcavitiesinlayeredporoelastichalf-spaceusingindirectboundaryelementmethod.Theapproachisvalidatedbycomparisonwiththeliterature,andtheeffectsofcavityinterval,incidentfrequency,andboundarydrainageconditiononthediffractionarestudiedthroughnumericalexamples.Itisshownthat,theinteractionbetweentwocavitiesissignificantandsurfacedisplacementpeaksbecomelargewhentwocavitiesareclose,andthesurfacedisplacementmaybesignificantlyamplifiedbytwincavities,andtheinfluencerangewithlargeamplificationcanbeaswideas40timesofthecavityradius.Surfacedisplacementsindryporoelasticcaseandsaturatedporoelasticcaseswithdrainedandundrainedboundariesareevidentlydifferentundercertaincircumstances,andthedifferencesmaybemuchlargerthanthoseinthefree-fieldresponse.