简介:ThemethodsforprotectingInPsurfaceagainstdegradationduringannealing,includingencapsulantandencpsulant-freetechniques;rapidthermalan-nealingofInPimplantedlayers;implantedionspeciesandsomeprofilesoftypicaldopants,etc.,theyareallthekeytechniquesconcerningionimplantationintose-mi-insulatingInP,andhavebeenreviewedsyntheticallyaswell.
简介:SomenewresultsofimplantdisorderingonInPbasedMQWstructuresbyim-plantedcompositionaldisorderingarepresented.TheenergyshiftofPLpeakdependsonionspecies,iondose,annealingconditionsandtargettemperature,TheresultsindicatethatthenonactiveionssuchasF^+andNe^+arethebestcandiatesforIICD,theiondosewhichcausedbiggestblueshiftisaround1×10^14cm^-2forroomtemperatureimplantationand5×10^14cm^-2foranelevatedimplantedtemperatureof200℃andtheoptimumannealingconditionisapproximately750℃for30s.AESandTEMcharacterizationsuggeststhationbombardmentbynonelectricallyactiveionssuchasF^+,Ne^+inducedsameamountoflayerinterdiffusionwhichresultsinthebandgapblueshiftduetothecompositionalchanges.
简介:InPintegratedphotonicshasbecomeacriticalenablerformoderntelecommunications,andispoisedtorevolutionizedatacommunications,precisionmetrology,spectrometry,andimaging.Thepossibilitytointegratehigh-performanceamplifiers,lasers,modulators,anddetectorsincombinationwithinterferometerswithinonechipisenablinggame-changingperformanceadvances,energysavings,andcostreductions.Genericintegrationacceleratesprogressthroughtheseparationofapplicationsfromacommontechnologydevelopment.Inthispaper,wereviewthecurrentstatusinInPintegratedphotonicsandtheeffortstointegratethenextgenerationofhigh-performancefunctionalityonacommonsubstrateusingthegenericmethodology.
简介:Weproposethatnanomaterialsareusedforfibers.Anovelnano-InPdopedfiberhasbeenfabricatedbythemethodofmodifiedchemicalvapordeposition(MCVD).Ithasbeenmeasuredthatthedopingconcentrationofphosphoruselementis0.1%.TherelationshipbetweenrefractiveindexandthewavelengthisobtainedbyfittingexperimentaldatatoSellmeierequation.Dispersionofthefiberhasbeencalculatedinthewavelengthrangeof1.2-1.6μm.Asthewavelengthvariesfrom1.20μmto1.60μm,dispersionparamete...
简介:WehavemeasuredthedeepenergyleveloftheInP:Fewhichissemi-insulatorthroughthemethodofOTCS.TheeffectoflightintensityonOTCSmeasurementismainlydiscussed.ThereareelectrontrapofET=0.034eVandholetrapofET=1.13eVinInP:Feunderthestronglightandlowtemperature.ThelocationoftheOTCSpeakofelectrontrap(ET=0.34eV)movestowardsthedirectionofhightemperaturer,whenthelightintensitywasincreased,ETisdifferentunderdifferentlightintensity.Itiscorrectedintermsoftheorythatthestuffratioofthedeepenergylevelisaffectedbythelightintensity.Theexperimentsshowthattheerrorisdecreasedgreatlywiththecorrection.
简介:Zinchasbeendiffusedinton-typeInxGa1-xAs,InPandGaAsinclosedam-poules,andtheexperimentaldataforInxGa1-xAsrarelyreportedpreviouslyhavebeenob-tained,TheoreticallythelinearrelationsipbetweenlogarithmicdiffusioncoefficientlnDandthecompositionxhasbeendemonstrated,whichisingoodagreementwiththeexperimentalresults.ThecalculateddiffusionjunctiondepthforInGaAsbasedonthediffusionmodelinwhichD^∝c^2isassumedalsoagreeswellwiththatoftheexperment,Finallytheoveralldiffusiontimeinamultiayerheterostructurewasapproximatedast=(∑√-ti)^2.
简介:WestudythroughelectromagneticmodelingtheabsorptionoflightofagivenwavelengthinanarrayofhorizontalInPnanowiresofdiameterlessthan100nm.Suchabsorptionisperformedmostefficientlybyusingpolarizedlightandbyexcitingacoupledopticalresonanceinasparsearray.Inthatcase,weexcitearesonanceintheindividualnanowiresandcoupletheresonancesinneighboringnanowiresthroughalatticeresonanceoftheperiodicarray.Atsucharesonance,anarraywithnanowiresof80nmindiametercanabsorbmorethaneighttimesmorestronglythanatight-packedarray,despitecontainingaseventimessmalleramountoftheabsorbingInPmaterial.
简介:ThedarkcurrentofIn0.47Ga0.53As/InPheterojunctionphotodiodes(HPDs)wasanalysed.Wefoundthatthereexistsanewdarkcurrentcompo-nent-deeplevel-assistedtunnelingcurrent.DLTSwasusedtomeasuretheIn0.47Ga0.53As/InPHPDs.Anelectronictrapwhichhasathermalactivationenergyof0.44eV,levelconcentrationof3.10×10^13cm^-3andelectroniccapturecrosssec-tionof1.72×10^12cm^2hasbeenfound.It^ˊsexistenceresultsinthenewtunnelingcurrent.
简介:摘要:随着社会经济的不断发展,能源的需求量不断增加,为了能够将有效降低能源的损耗,实现能源的可持续发展目标,我国对于节能环保事业的发展尤为的关注。基于科学技术的发展,我国在照明领域开展的环保事业发展取得了一定的成就。例如LED的研发和应用,其在使用的过程中不仅节能环保,同时也体积比较小,且功能时效时间比较长,与普通的照明源对比来讲更具有发展前景。经过技术研发人员的不懈努力,找到了一种能够有效提升LED出光率的新技术,即通过蓝宝石图形化衬底实现LED高出光率的目标,为LED广泛应用于多个领域地奠定了坚实的基础。本文通过对蓝宝石图形化衬底提升LED出光率的机理、表面微结构对LED发光率的影响进行了分析,并探讨了LED蓝宝石图形化衬底的制作过程。