简介:Wereportonanoveldibenzothiophene-basedtwo-photonfluorescentprobeforselectivenuclearbioimaging,whichcontainsbilaterallysymmetricalpyridineringsconnectedbyacentralconjugated-bridgedibenzothiophene.Thisprobepossessesalargetwo-photonabsorptioncross-sectionof471GM,yieldsa25-foldenhancementofthefluorescencetitration,andastrongerphotostabilityfornucleilabelingthanexistingprobes.Thereal-timeobservationperiodisaminimumof1800sunderafemtosecondlaserexcitation,whichissignificantlylongerthanthatof40,6-diamidino-2-phenylindole.Theaboveresultsconfirmthatthisnovelmoleculeisasuitabletwo-photonfluorescentprobeforapplicationtonuclearbioimagingincells.
简介:Wereportanopticallyaddressedliquidcrystallightvalve,ahome-madedevicethathassolvedtheproblemoflowtransmittancecausedbyopaqueelectrodesinpresenttransmissivespatiallightmodulators.Theoperatingcharacteristicofthelightvalveisanalyzed.Theoptimumdrivingvoltageofthisdeviceis27Vat300Hz,asdeducedfromtheequivalentelectricmodel.Itstransmittancereaches80%anditscontrastisapproximately40:1.Itsdynamicperformance,especiallyitsabilitytoobscurelaserlightatprogrammedlocations,isdemonstrated.Theresultsareingoodagreementwiththedesiredshape,whichindicatesthatourlightvalveperformsverywell.
简介:Thereisatradeoffbetweenthequantumefficiencyandthespectralresponselinewidthinresonant-cavityenhanced(RCE)photodetectors.Recentlyanewtypeofphotodetectorstructurehasbeenproposed,whichutilizesaninclinedmirrorinathree-mirrorcavity.Itdecouplesthequantumefficiencyandthespectralresponselinewidthandhashighresponsespeed,highquantumefficiency,andnarrowlinewidthsimultaneously.Theanalysisresultindicatesthatthelinewidthof0.8nmandquantumefficiencyhigherthan70%canbeachievedonthisdevice.Fora30×30μm2device,themaximumbandwidthapproaches23GHz.
简介:主要叙述了液压系统仿真的发展历程和应用领域。仿真技术主要用于产品研发和优化,可以大量节省产品研发时间。随着仿真技术水平的提高,各领域之间的联合仿真技术开启了仿真技术的新起源。
简介:介绍了CAQN网络检测系统的应用和特点,解决了人工测量产品不精确的现状。对产品质量实施有效控制,通过数据自动采集、计算,来实现实时监控、数据查询、质量分析等功能。