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(SchoolofPhysicsandElectronicEngineer

2、ing,GuangzhouUniversity,Guangzhou510405,China)Abstract:Theopticalfieldinducedrefractiveindexchangeindoublequantumwellsiscalculatedtheoreti2callybydensitymatrixanditerativemethod.NumericalresultsareillustratedforatypicalGaAs/AlGaAsdoublequantumwells(DQWs).R

3、esultsshowthattheelectricfieldinducedrefractiveindexchangeinDQWsvarieswiththewidthoftheintermediatepotentialbarrier.Anditdecreasesastheincidentopticalintensityincreases.Keywords:refractiveindexchange;doublequantumwellsCLCnumber:O417.3Documentcode:A[4]strac

4、teshadbeenstudiedatroomtemperaturetoo.0IntroductionTheresearchresultsindicatethatthenonlinearrefractiveindexn2intheZnCdSe2ZnSe/GaAsMQWsisaboutThanksforthemolecular2beamepitaxygrowth-5105×10-5esu.InRef[5],themagnetic2fieldde2technology,inrecentyears,manykin

5、dsofsemiconduc2pendenceofthenonlineardifferentialrefractiveindextormicrostructuresinglequantumwellandmultipleΔninquantumwires2measuredbynon2degeneratepumpquantumwellswithdifferentshapecanbefabricatedandprobespectroscopyisinvestigatedtheoretically.Thewithhi

6、ghquality.BecauseofitspossibilitytoproducerefractiveindexΔnexhibitspositiveandnegativepeaksnewopto2electronicdevices,theresearchesoftheirop2atcertainpumpandprobedetuningfrequenciesassoci2ticalpropertieshavedrawnwideattention.Itwasshownatedwiththeformationo

7、fbiexcitonsandbleachingofbytheearlierexperimentthattheintersubbandtransitionexcitons,respectively.AndfieldeffectontherefractiveinaconductionbandofquantumwellmayhavelargeindexinAlGaAsquantumwellstructureshadbeenstud2[1,2][6]dipolemoment.Soitcaneasilybepredi

8、ctedthatiedbyYasuoKan.intersubbandopticaltransitionsinaquantumwellwillInthispaper,wewillusethecompactdensityma2havelargeopticalnonlinearities.trixapproachanditerativemethodtocalculatethere2InRef[3],thefieldin