半導(dǎo)體超晶格子帶間光躍遷吸收理論研究.pdf

1、首都師范大學(xué)碩士學(xué)位論文半導(dǎo)體超晶格子帶間光躍遷吸收理論研究姓名：李文兵申請學(xué)位級別：碩士專業(yè)：光學(xué)指導(dǎo)教師：趙國忠王福合20060425首都師大碩十論文李文兵：半導(dǎo)體超晶格子帶問躍遷光吸收研究AbstractSemiconductorsuperlatticeandquantumwellhavebecomeoneoftheforefrontresearchtopicsincondensedmatterphysicsinrecentyea

2、rsComparisingwithbulkmaterials，semiconductorsuperlatticeandquantumwel1havereceivedincreasinginterestsduetoagreatdealofnovelandpoticalmarvelousphysicalpropertiesobserved，andprospectiveandpotentialapplicationsInthisthesis，

3、wepresentsomedetailedtheoryonelectronicenergylevelstructureandIntersubbandabsorptioninsemconductorsuperlatticc’swithperiodicstructuralThemainresultsofthisthesisaresummarizedasfollOWS：1、weinvestigatedtheelectronicenergyle

4、velstructureoftheboundstateinGaAs／Al。Gal一。supperlatticebasedonthegeneralformaliSilloftheKronig—PennymodelTheopticaltransitionfrequency。thebandwidthandtransitionmomentasafunctionofthequantumwellwidth，thebarrierwidthandthe

5、compositionpercentofA1areobtainedInaddition，therelationbetweenenergyandthewavevectorisgivenanddiscussed，OurcalculatedresultsshowthatthemostimportantfactorthatimpactstheopticaltransitionfrequencyisthewidthofwellThewiderth

6、ewellis，thesmallertheopticaltransitionfrequencyisThemainfactorthataffectthebandwidthisthewidthofbarrierThewiderthewell(thebarrier)is，thesmallerthewellandbandwidthisThesecondsubbandisaffectedmoredistinctlythanthefirstsubb

7、andbythewavevector2、weinvestigatedtheelectronicenergy1evelstructureoftheextendedstateinGaAs／A1。6aI一；supperlatticebasedonthegeneralformalismoftheKronig—PennymodelTheopticaltransitionfrequencyandthebandwidthasafunctionofth