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25 个结果
  • 简介:Weevaluatetheinfluenceofthethermallyassistedtunneling(TAT)mechanismonchargetrappingmemory(CTM)cellperformancebynumericalsimulation,andcomprehensivelyanalysetheeffectsofthetemperature,trapdepth,distributionoftrappedcharge,gatevoltageandparametersofTATonerasing/programmingspeedandretentionperformance.TATisanindispensablemechanisminCTMthatcanincreasethedetrappingprobabilityoftrappedcharge.OurresultsrevealthattheTATeffectcausesthesensitivityofcellperformancetotemperatureanditcouldaffecttheoperationalspeed,especiallyfortheerasingoperation.TheresultsshowthattheretentionperformancedegradescomparedwithwhentheTATmechanismisignored.

  • 标签: 模拟电荷 内存性能 隧道 捕获 陷阱电荷 电池性能
  • 简介:面对一块线性地极化的激光地由muon散布一个电子在第一出生的近似被调查。理论结果揭示下列:我)在媒介和大散布角度,许多multiphoton过程发生在散布,和这些非线性的现象期间可以预言在碰撞过程形成的电子和muon的反响的状态。ii)photoabsorption(反的bremsstrahlung)统治光致核裂变(bremsstrahlung),引起生气的节增加。iii)当激光极化从事件方向背离时,lasermodified总数十字节更加取决于散布电子的方位角的角度。地力量,极化方向,和电子影响精力上的生气的节的依赖被学习。

  • 标签: 激光极化 散布 电子 碰撞过程 极化方向 非线性
  • 简介:认识到极化坡度冷却的一个新奇、简单的方法(PGC)被报导。稳定,变并且外部洞二极管激光的频率的快速的调节被使用Zeeman-effect-assisted认识到Doppler免费的浸透的吸收技术。基于这种方便技术,87Rb寒冷原子在磁电机光的陷井(警句)从房间温度背景蒸汽被捕获。同时,不变的数字,密度和在MOT的原子的一生被测量。随后,一个frequency-fast-varying电路被设计认识到PGC,它在实验有效地并且可靠地被表明。冷原子云的温度被二个不同方法测量,它与对方一起与一致。

  • 标签: 饱和吸收 塞曼效应 冷却 梯度 偏振 外腔半导体激光器
  • 简介:WereportanenhancementcavityforfemtosecondTi:sapphirelaserattherepetitionrateof170MHz.Anenhancementfactorof24isobtainedwhentheinjectingpulseshaveanaveragepowerof1Wandapulsedurationof80fs.ByplacingaBBOcrystalatthefocusofthecavity,weobtaina392-mWintracavitydoubled-frequencylaser,correspondingtoaconversionefficiencyof43%.Theoutputpowerhasalong-termstabilitywitharootmeansquare(RMS)of0.036%.

  • 标签: 内腔倍频激光器 增强腔 蓝宝石 飞秒 脉冲持续时间
  • 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。

  • 标签: 多晶硅 保护程序 微电子学 电子元件
  • 简介:Thispaperdescribestheeffectsofnon-equilibriumairplasmageneratedbyadielectricbarrierdischarge(DBD)onthecombustionoflowheatingvaluefuels.TheexperimentalresultsindicatethatadditionofaverysmallamountofenergytotheairflowintheformofDBDsignificantlyimprovestheflamestability.Moreover,maincombustioncharacteristicssuchasflamepropagationspeed,combustionintensityandleanblow-offlimitsarealsoenhancedbytheeffectofplasma.SomeactiveradicalssuchasexcitedOatomandexcitedN2moleculeareobservedbyspectrographinthedischargearea.BasedontheresultsofnumericalinvestigationwecanconcludethattheseactiveradicalsgeneratedindischargeareacanacceleratetheproductionrateofactiveOHradicalwhichplaysakeyroleintheoxidationprocessoflowheatingvaluefuel,andthusthewholecombustionprocessisaccelerated.

  • 标签: LOW HEATING value fuels NON-EQUILIBRIUM plasma
  • 简介:Inthispaper,acylindricaldielectricbarrierdischarge(DBD)reactorhasbeendevelopedfortheconversionofmethaneintohydrogenandothervaluablechemicals.Theeffectsofawiderangeofprocessingparametersincludingdischargepower,residencetimeandfrequencyontheperformanceofplasmamethaneconversionreactionhavebeeninvestigated.TheresultsshowthattheCH4DBDcouldbecharacterizedasatypicalfilamentarydischargewithamicrodis-chargezoneineachhalf-cycleoftheappliedvoltage.TheconversionofCH4reachesamaximumof25.2%atafeedflowrateof50mL·min-1,adischargepowerof45Wandanexcitationfrequencyof20kHz.Itisfoundthattheresidencetimeofmethaneinthedischargezonehasthemostsignificanteffectonbothmethaneconversionandhydrogenyield,whicharesignificantlyhigherathigherresidencetime.

  • 标签: 等离子体辅助 放电反应器 甲烷转化 电介质 大气压 势垒
  • 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%。

  • 标签: 超声波雾化器 定量分析 激光诱导 铅分析 水溶液 光谱
  • 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.

  • 标签: PHOTONIC crystal NANOCAVITY semiconductor quantum VACUUM
  • 简介:Thispaperproposesaschemewhereonecanrealizequantumcloningofanunknowntwo-atomentangledstatewithassistanceofastatepreparerincavityQED.Thefirststageoftheschemerequiresusualteleportation.Inthesecondstageofthescheme,withtheassistanceofthepreparer,theperfectcopiesofanunknownatomicentangledstatecanbeproduced.

  • 标签: 量子克隆 偶原子核 空泡 QED
  • 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.

  • 标签: CDSE量子点 太阳能电池 瞬态光电压 敏化 石墨 功率转换效率
  • 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.

  • 标签: INGAAS compact AVENUE wave room FAR
  • 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.

  • 标签: response fast experimental optical multiple PUMP
  • 简介:Wetheoreticallyinvestigatetheelectrontransmissionthroughaseven-layersemiconductorheterostructurewiththeDresselhausspin-orbitcouplingundertwoappliedoscillatingfields.Numericalresultsshowthatbothofthespin-dependentsymmetricBreit-WignerandtheasymmetricFanoresonancesappearandthatthepropertiesofthesetwotypesofresonancepeaksaredependentontheamplitudeandtherelativephasesofthetwoappliedoscillatingfields.Themodulationofthespin-polarizationefficiencyoftransmittedelectronsbytherelativephaseisalsodiscussed.

  • 标签: 半导体异质结构 电子传输 共振峰 维格纳 自旋相关 光子
  • 简介:OnaccountoftheexcellentmechanicalpropertiesofCrNfilmsuchasgoodwearandcorrosionresistance,andoxidizationatamuchhighertemperature,CrNfilmhasbeendemonstratedasoneofthebestcoatingsforenlargingthebearingatpresent.However,steelworkinglifespanatpresentt.However,withthemoreincreasinglyaggressiveoftheworkingenvironmentofmechanicalcomponents,especiallyforbearingsteel,newcoatingtechnologieswithamorebetterpropertiesofthetreatedpartssuchaswearandcorrosionresistancearerequired.

  • 标签: 复合涂层 离子束辅助沉积 轴承钢 耐磨性实验
  • 简介:Wereporttheinvestigationontheperformanceofanamplificationassisteddifferencefrequencygeneration(AA-DFG)systemdrivenbypulsedpumpandcontinuous-waveprimarysignallasers.AmonolithictandemlithiumniobatesuperlatticewasemployedasthenonlinearcrystalwithauniformgratingsectionfortheDFGprocess,followedbyachirpsectionfortheopticalparametricamplificationprocess.Theimpactsofpumppulseshape,primarysignalpower,inputbeamdiameter,andcrystalstructureonthepump-to-idlerconversionefficiencyoftheAA-DFGsystemwerecomprehensivelystudiedbynumericallysolvingthecoupledwaveequations.Itisconcludedthatsquarepumppulseandhighprimarysignalpowerarebeneficialtohighpump-to-idlerconversionefficiency.Inaddition,tighterinputbeamfocusandsmallerDFGlengthproportioncouldredeemthereductioninconversionefficiencyresultingfromwideracceptancebandwidthsfortheinputlasers.Webelievethatsuchsystemscombiningthemeritsofhighstabilityinheritedfromcavity-freeconfigurationandhighefficiencyattributedfromthecascadednonlinearconversionshouldbeofgreatinteresttoawidecommunity,especiallywhenthepulseshapingtechniqueisincorporated.

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