简介:Weevaluatetheinfluenceofthethermallyassistedtunneling(TAT)mechanismonchargetrappingmemory(CTM)cellperformancebynumericalsimulation,andcomprehensivelyanalysetheeffectsofthetemperature,trapdepth,distributionoftrappedcharge,gatevoltageandparametersofTATonerasing/programmingspeedandretentionperformance.TATisanindispensablemechanisminCTMthatcanincreasethedetrappingprobabilityoftrappedcharge.OurresultsrevealthattheTATeffectcausesthesensitivityofcellperformancetotemperatureanditcouldaffecttheoperationalspeed,especiallyfortheerasingoperation.TheresultsshowthattheretentionperformancedegradescomparedwithwhentheTATmechanismisignored.
简介:WereportanenhancementcavityforfemtosecondTi:sapphirelaserattherepetitionrateof170MHz.Anenhancementfactorof24isobtainedwhentheinjectingpulseshaveanaveragepowerof1Wandapulsedurationof80fs.ByplacingaBBOcrystalatthefocusofthecavity,weobtaina392-mWintracavitydoubled-frequencylaser,correspondingtoaconversionefficiencyof43%.Theoutputpowerhasalong-termstabilitywitharootmeansquare(RMS)of0.036%.
简介:一个新奇帮助多晶硅的控制硅的整流器(SCR)被介绍;在这篇论文分析了,它在HHNEC的0.18μm电可擦可编程只读存储器过程被制作。帮助多晶硅的SCR利用多晶硅层没有占据额外的布局区域,由通行证帮助静电的分泌物(ESD)电流。TLP当前电压(I-V)测量结果显示出给一样的布局区域那,帮助多晶硅的SCR的坚韧性性能能被改进到3次常规MLSCR的。而且,一个手指如此的帮助多晶硅的SCR,占据仅仅947μm,2]布局区域,能经历7-kVHBMESD应力。结果进一步证明帮助多晶硅的SCR的S类型I-V特征对由改变设备尺寸的不同操作条件可调节。与传统的SCR相比,这新SCR能绕过更多的ESD水流;消费更小的IC区域。
简介:Thispaperdescribestheeffectsofnon-equilibriumairplasmageneratedbyadielectricbarrierdischarge(DBD)onthecombustionoflowheatingvaluefuels.TheexperimentalresultsindicatethatadditionofaverysmallamountofenergytotheairflowintheformofDBDsignificantlyimprovestheflamestability.Moreover,maincombustioncharacteristicssuchasflamepropagationspeed,combustionintensityandleanblow-offlimitsarealsoenhancedbytheeffectofplasma.SomeactiveradicalssuchasexcitedOatomandexcitedN2moleculeareobservedbyspectrographinthedischargearea.BasedontheresultsofnumericalinvestigationwecanconcludethattheseactiveradicalsgeneratedindischargeareacanacceleratetheproductionrateofactiveOHradicalwhichplaysakeyroleintheoxidationprocessoflowheatingvaluefuel,andthusthewholecombustionprocessisaccelerated.
简介:Inthispaper,acylindricaldielectricbarrierdischarge(DBD)reactorhasbeendevelopedfortheconversionofmethaneintohydrogenandothervaluablechemicals.Theeffectsofawiderangeofprocessingparametersincludingdischargepower,residencetimeandfrequencyontheperformanceofplasmamethaneconversionreactionhavebeeninvestigated.TheresultsshowthattheCH4DBDcouldbecharacterizedasatypicalfilamentarydischargewithamicrodis-chargezoneineachhalf-cycleoftheappliedvoltage.TheconversionofCH4reachesamaximumof25.2%atafeedflowrateof50mL·min-1,adischargepowerof45Wandanexcitationfrequencyof20kHz.Itisfoundthattheresidencetimeofmethaneinthedischargezonehasthemostsignificanteffectonbothmethaneconversionandhydrogenyield,whicharesignificantlyhigherathigherresidencetime.
简介:在这研究,一个超声的喷雾器单位被建立为液体样品察觉改进导致激光的故障光谱学(解放)的定量分析能力,用象一个例子的重金属元素Pb的答案。一个分析过程被设计保证LIBS的稳定性和重覆性发信号。一系列实验根据过程严格地被执行。试验性的参数基于脉搏精力影响和排放特征的时间的进化的研究被优化。血浆温度和电子密度被计算证实血浆的LTE状态。由背景使紧张正常化被表明是在这个工作的一个适当方法。为Pb分析的这个系统的线性范围被与不同集中测量12件样品在04,150ppm的一个集中范围上证实。适合的刻度曲线的关联系数在线性范围象99.94%一样高,并且Pb的LOD作为2.93ppm被证实。集中预言实验被执行在上一进一步六件样品。系统的优秀量的能力被样品的真实、预言的集中的比较表明。最低相对错误是0.043%并且最高是仅仅7.1%。
简介:Thecoherentlight-matterinteractionhasdrawnanenormousamountofattentionforitsfundamentalimportanceinthecavityquantum-electrodynamics(C-QED)fieldandgreatpotentialinquantuminformationapplications.Here,wedesignahybridC-QEDsystemconsistingofaquantumdot(QD)drivenbytwo-tonefieldsimplantedinaphotoniccrystal(PhC)cavitycoupledtoanauxiliarycavitywithasingle-modewaveguideandinvestigatethehybridsystemoperatingintheweak,intermediate,andstrongcouplingregimesofthelight-matterinteractionviacomparingtheQD-photoninteractionwiththedipoledecayrateandthecavityfielddecayrate.Theresultsindicatethattheauxiliarycavityplaysakeyroleinthehybridsystem,whichaffordsaquantumchanneltoinfluencetheabsorptionoftheprobefield.BycontrollingthecouplingstrengthbetweentheauxiliarycavityandthePhCcavity,thephenomenonoftheMollowtripletcanappearintheintermediatecouplingregime,andevenintheweakcouplingregime.WefurtherstudythestrongcouplinginteractionmanifestedbyvacuumRabisplittingintheabsorptionwithmanipulatingthecavity-cavitycouplingunderdifferentparameterregimes.ThisstudyprovidesapromisingplatformforunderstandingthedynamicsofQD-C-QEDsystemsandpavingthewaytowardon-chipQD-basednanophotonicdevices.
简介:Thispaperproposesaschemewhereonecanrealizequantumcloningofanunknowntwo-atomentangledstatewithassistanceofastatepreparerincavityQED.Thefirststageoftheschemerequiresusualteleportation.Inthesecondstageofthescheme,withtheassistanceofthepreparer,theperfectcopiesofanunknownatomicentangledstatecanbeproduced.
简介:CdSequantumdotsensitizedsolarcells(QDSCs)modifiedwithgraphenequantumdots(GQDs)havebeensuccessfullyachievedinthisworkforthefirsttime.Satisfactorily,theoptimizedphotovoltage(Voc)ofthemodifiedQDSCswasapproximately0.04VhigherthanthatofplainCdSeQDSCs,consequentlyimprovingthephotovoltaicperformanceoftheresultingQDSCs.ServedasanovelcoatingontheCdSeQDsensitizedphotoanode,GQDsplayedavitalroleinimprovingVocduetothesuppressedchargerecombinationwhichhasbeenconfirmedbyelectronimpedancespectroscopyaswellastransientphotovoltagedecaymeasurements.Moreover,differentadsorptionsequences,concentrationanddepositiontimeofGQDshavealsobeensystematicallyinvestigatedtoboostthepowerconversionefficiency(PCE)ofCdSeQDSCs.AfterthecoatingofCdSewithGQDs,theresultingchampionCdSeQDSCsexhibitedanimprovedPCEof6.59%underAM1.5Gfullonesunillumination.
简介:Millimeterandterahertzwavephotodetectorshaveawiderangeofapplications.However,thestate-of-the-arttechniqueslagfarbehindtheurgentdemandduetothestructureandperformancelimitations.Here,wereportsensitiveanddirectmillimeterandterahertzwavephotodetectionincompactInGaAs-basedsubwavelengthohmicmetal–semiconductor–metalstructures.Thephotoresponseoriginatesfromunidirectionaltransportationofnonequilibriumelectronsinducedbysurfaceplasmonpolaritonsunderirradiation.ThedetectedquantumenergiesofelectromagneticwavesarefarbelowthebandgapofInGaAs,offering,tothebestofourknowledge,anoveldirectphotoelectricconversionpathwayforInGaAsbeyonditsbandgaplimit.Theachievedroomtemperaturerisetimeandnoiseequivalentpowerofthedetectorare45μsand20pW·Hz^-1∕2,respectively,atthe0.0375THz(8mm)wave.Thedetectedwavelengthistunablebymountingdifferentcouplingantennas.Roomtemperatureterahertzimagingofmacroscopicsamplesataround0.166THzisalsodemonstrated.Thisworkopensanavenueforsensitiveandlarge-areauncooledmillimeterandterahertzfocalplanararrays.
简介:Anall-opticallight–control–lightfunctionalitywiththestructureofamicrofiberknotresonator(MKR)coatedwithtindisulfide(SnS2)nanosheetsisexperimentallydemonstrated.TheevanescentlightintheMKR[witharesonanceQof~59,000andanextinctionratio(ER)of~26dB]isexploitedtoenhancelight–matterinteractionbycoatingatwo-dimensionalmaterialSnS2nanosheetontoit.Thankstotheenhancedlight–matterinteractionandthestrongabsorptionpropertyofSnS2,thetransmittedopticalpowercanbetunedquasi-linearlywithanexternalvioletpumplightpower,whereatransmittedopticalpowervariationrateΔTwithrespecttothevioletlightpowerof~0.22dB∕mWisobtained.Inaddition,theMKRstructurepossessingmultipleresonancesenablesadirectexperimentaldemonstrationoftherelationshipbetweenresonanceproperties(suchasQandER),andtheobtainedΔTvariationratewithrespecttothevioletlightpower.ItverifiesexperimentallythatahigherresonanceQandalargerERcanleadtoahigherΔTvariationrate.Intermsoftheoperatingspeed,thisdevicerunsasfastas~3.2ms.Thiskindofall-opticallight–control–lightfunctionalstructuremayfindapplicationsinfutureall-opticalcircuitry,handheldfibersensors,etc.
简介:Wetheoreticallyinvestigatetheelectrontransmissionthroughaseven-layersemiconductorheterostructurewiththeDresselhausspin-orbitcouplingundertwoappliedoscillatingfields.Numericalresultsshowthatbothofthespin-dependentsymmetricBreit-WignerandtheasymmetricFanoresonancesappearandthatthepropertiesofthesetwotypesofresonancepeaksaredependentontheamplitudeandtherelativephasesofthetwoappliedoscillatingfields.Themodulationofthespin-polarizationefficiencyoftransmittedelectronsbytherelativephaseisalsodiscussed.
简介:OnaccountoftheexcellentmechanicalpropertiesofCrNfilmsuchasgoodwearandcorrosionresistance,andoxidizationatamuchhighertemperature,CrNfilmhasbeendemonstratedasoneofthebestcoatingsforenlargingthebearingatpresent.However,steelworkinglifespanatpresentt.However,withthemoreincreasinglyaggressiveoftheworkingenvironmentofmechanicalcomponents,especiallyforbearingsteel,newcoatingtechnologieswithamorebetterpropertiesofthetreatedpartssuchaswearandcorrosionresistancearerequired.
简介:Wereporttheinvestigationontheperformanceofanamplificationassisteddifferencefrequencygeneration(AA-DFG)systemdrivenbypulsedpumpandcontinuous-waveprimarysignallasers.AmonolithictandemlithiumniobatesuperlatticewasemployedasthenonlinearcrystalwithauniformgratingsectionfortheDFGprocess,followedbyachirpsectionfortheopticalparametricamplificationprocess.Theimpactsofpumppulseshape,primarysignalpower,inputbeamdiameter,andcrystalstructureonthepump-to-idlerconversionefficiencyoftheAA-DFGsystemwerecomprehensivelystudiedbynumericallysolvingthecoupledwaveequations.Itisconcludedthatsquarepumppulseandhighprimarysignalpowerarebeneficialtohighpump-to-idlerconversionefficiency.Inaddition,tighterinputbeamfocusandsmallerDFGlengthproportioncouldredeemthereductioninconversionefficiencyresultingfromwideracceptancebandwidthsfortheinputlasers.Webelievethatsuchsystemscombiningthemeritsofhighstabilityinheritedfromcavity-freeconfigurationandhighefficiencyattributedfromthecascadednonlinearconversionshouldbeofgreatinteresttoawidecommunity,especiallywhenthepulseshapingtechniqueisincorporated.