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1、第35卷第1期吉首大学学报(自然科学版)Vol.35No.12014年1月JournalofJishouUniversity(NaturalScienceEdition)Jan.2014ArticleID:10072985(2014)01002907∗OpticalAbsorptionofanQuantumWellsinTerahertzPlasmonicMicrocavity1,2,MENGFanbin1,WUHongwei1MIXianwu(1.CollegeofPhysicalScienceandMe
2、chanicalEngineering,JishouUniversity,Jishou416000,HunanChina;2.DepartmentofPhysicsandInformationEngineering,HuaihuaCollege,Huaihua418000,HunanChina)Abstract:Anapproachofsolvingexcitonicabsorptionispresentedforanasymmetricdoublequantumwelldrivenbyanintenset
3、erahertzfieldembeddedinasemiconductormicrocavity.TheformalismreliesonZubarev’sGreenfunctions,whichallowustohandlethemicrocavityfieldandterahertzfieldasthephotonsandtofullyaccountforthequantumaspectoftheopticalresponseoftheasymmetricdoublequantumwells.Richn
4、onlineardynamicsbehaviorsofthereplicapeakandtheAutler-Townessplittingaresystematicallystudiedinundopedasymmetricdoublequantumwellsfortakingaccountofthemulti-plefactors,suchasthedetuning,couplingconstantoftheintenseterahertzfield,decayrateofthesecondelectro
5、nsubband,photonnumberoftheintenseterahertzfield.Theworkprovidesasimpleandconven-ientapproachtodealwiththemicrocavity-opticalresponseoftheasymmetricdoublequantumwellinafullyquantummechanicalframework.Keywords:opticalabsorption,intenseterahertzfield,Autler-T
6、ownessplittingCLCnumber:O47Documentcode:ADOI:10.3969/j.issn.10072985.2014.01.0081IntroductionTheopticalpropertiesofsemiconductorquantumwell(QW)havebeenreportedmanytimesinre-[15]centyears.Particularly,theresearchtopicofanexternalelectricfieldbeingappliedtot
7、hesemicon-ductorQWhasattractedgreatinterestrecentlybecauseitplaysanimportantroleinunderstandingvari-ousinterestingphenomenoninsemiconductornanosizestructure.Adirectcurrent(dc)electricfieldis[67]appliedalongthesemiconductorQWgrowthdirection,theFranz-Keldysh
8、effect(FKE)andthequan-[8]tumconfineStarkeffect(QCSE)havebeenstudiedinsemiconductorQW.Foranacelectricfieldap-pliedtoQWmodulatestheinterbandabsorption,inparticulartheelectro-opticmodulationbyaterahertz(THz)elec
