双量子阱中的折射率改变英文

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1、第4卷　第2期广州大学学报(自然科学版)Vol.4No.22005年　4月　JournalofGuangzhouUniversity(NaturalScienceEdition)Apr.2005文章编号:167124229(2005)0220108204RefractiveindexchangeindoublequantumwellsDENGYong2qing,GUOKang2xian,YUFeng2mei,WANGRui2qiang(SchoolofPhysicsandElectronicEn

2、gineering,GuangzhouUniversity,Guangzhou510405,China)Abstract:Theopticalfieldinducedrefractiveindexchangeindoublequantumwellsiscalculatedtheoreti2callybydensitymatrixanditerativemethod.NumericalresultsareillustratedforatypicalGaAs/AlGaAsdoublequantumw

3、ells(DQWs).ResultsshowthattheelectricfieldinducedrefractiveindexchangeinDQWsvarieswiththewidthoftheintermediatepotentialbarrier.Anditdecreasesastheincidentopticalintensityincreases.Keywords:refractiveindexchange;doublequantumwellsCLCnumber:O417.3Docu

4、mentcode:A[4]stracteshadbeenstudiedatroomtemperaturetoo.0IntroductionTheresearchresultsindicatethatthenonlinearrefractiveindexn2intheZnCdSe2ZnSe/GaAsMQWsisaboutThanksforthemolecular2beamepitaxygrowth-5105×10-5esu.InRef[5],themagnetic2fieldde2technolo

5、gy,inrecentyears,manykindsofsemiconduc2pendenceofthenonlineardifferentialrefractiveindextormicrostructuresinglequantumwellandmultipleΔninquantumwires2measuredbynon2degeneratepumpquantumwellswithdifferentshapecanbefabricatedandprobespectroscopyisinves

6、tigatedtheoretically.Thewithhighquality.BecauseofitspossibilitytoproducerefractiveindexΔnexhibitspositiveandnegativepeaksnewopto2electronicdevices,theresearchesoftheirop2atcertainpumpandprobedetuningfrequenciesassoci2ticalpropertieshavedrawnwideatten

7、tion.Itwasshownatedwiththeformationofbiexcitonsandbleachingofbytheearlierexperimentthattheintersubbandtransitionexcitons,respectively.AndfieldeffectontherefractiveinaconductionbandofquantumwellmayhavelargeindexinAlGaAsquantumwellstructureshadbeenstud

8、2[1,2][6]dipolemoment.SoitcaneasilybepredictedthatiedbyYasuoKan.intersubbandopticaltransitionsinaquantumwellwillInthispaper,wewillusethecompactdensityma2havelargeopticalnonlinearities.trixapproachanditerativemethodtocalculatethere2InRef[3],thefieldin