多層結(jié)構(gòu)中波傳播的幾個(gè)理論問題研究.pdf

1、南昌大學(xué)碩士學(xué)位論文多層結(jié)構(gòu)中波傳播的幾個(gè)理論問題研究姓名：王同標(biāo)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：理論物理指導(dǎo)教師：劉念華20070601AbstractABSTRACTWestudyonthetheoreticalproblemsforthewavepropagationinmultilayeredstructuresnlethesisconcentratesonthetransmissionofelectroninonedimensiona

2、lfinitequantumwellandtheinteractionbetweenlightandmaterialsinthecavitywhenthelightspreadinthecavityofphotoniccrystalThetheoreticalresearchisgiveninthefollowingEveryquantumwellhasitsonlyeigenenergylevel，andeigen—energyhas

3、relationwiththesizeofthequantumwellIfthewidthofquantumwellisperiodicallymodulated，whichisequivalenttocouplingquantumwellwithdifferenteigen—energyitCanleadtonewtransferphenomenonThetransmittanceoftheonedimensionalmul卸lequ

4、antumwellstructurew油dualperiodicallymodulatedthicknesswascalculatedbymeansoftransfermatrixmethodAndtheelectricalfieldwavefunctionwhichwasmodulatedbythewidthofthewellisgivenWhenthethicknessofthequantumwellWaSmodulatedperi

5、odicallytheedgeofbandswouldbemovedTheupperbandedgewouldmovetohigherenergyandthelowerbandedgewouldmovetolowerenergySomestatesofbandedgesappearinthegapoftheformersingleperiodicpotentialmultiplequantumwells，andformsomenalTo

6、wsubbendsThewavefunctionsinthenarrowbandsarelocalizedBecausethetransmiRanceandeigenvalueofelectrondependonthematrixproductofthewellandpotential，weneedonlytochangethematrixofthewellandpotentialifthereexistdefectinthequant

7、umwell，thenthetransmittanceandeigenvalueCallbeacquiredIfthedispersivedefectexistsinthemiddleofphotoniccrystals，thisdefectcallappearnegativerefractionindexinsomefrequencyrangeWecalculatedthetransmissionspectrumanddensityo

8、fstatesofonedimensionalphotoniccrystalswithdispersivecavityWeuseaLorentzmodeasthedispersivemedium，therelationshipbetweentherealandimaginarypartofrefractionindexandthefrequencyoftheelectromagneticwaveisalsocalculated，andf