近化學(xué)計(jì)量比鈮酸鋰晶體電光性能的研究.pdf

1、南開(kāi)大學(xué)碩士學(xué)位論文近化學(xué)計(jì)量比鈮酸鋰晶體電光性能的研究姓名：劉宏德申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：凝聚態(tài)物理指導(dǎo)教師：許京軍孔勇發(fā)20040518南開(kāi)大學(xué)碩士學(xué)位論文AbstractLithiumniobate(LiNb03)isarlexcellentsyntheticcrystal，whichhasmanyimportantproperties，suchaselectrooptic，acousto—optic，thermaloptic，p

2、iezoelectricandphotorefractiveeffects，etc，Inthelastfewyears，manynewtechniquesandstudiesrelativetolithiumniobatecrystalsdevelopedandbecamehotspots，forinstance，thenonvolatileholographicrecording，thequasiphasematchingperiod

3、icallypoledlithiumniobate(PPLN)wavegenerationandcontrolatTHzwaveAndmostimportantlybecauselithiumniobatecrystalsplaysasignificantroleinIntegrateoptics，ithasbeenconsideredasapromisingcandidatefor‘‘OpticalSilicon”materialHo

4、weverthecrystalweusuallyusediscongruent，whichhasaplentyofintrinsicdefectsMoreandmoreexperimentsresultsindicatethattheseintrinsicdefectsdegradethephysicalcharacteristiesofcrystalsWiththeincreasementoftheLi20contentthereis

5、agreatenhancementonsomecharacterizationsoflithiumniobatecrystalsInthispaper，weinvestigatedtheelectro—opticalcharacteristicsofnear—stoichiometriclithiumniobatecrystalsInchapterone，wegenerallyintroducedthebackgrotmdandobje

6、ctiveofthisworkInchaptertwo，weintroducedthefabricatingprocessofthenearstoichiometriclithiumniobateplatesindetml，especiallytheprocessof3inchwafersandbatchprocessofplatesInchapterthree，weinvestigatedthephotorefractiveresis

7、tantcharacteristicsofthenearstoichiometriclithiumniobatecrystalsdopedwithMgTheyCanwithstandlightintensityashighas26堿|矗whichismorethan6orderslargerascomparedwiththatofcongruentonesInchapterfour，weinvestigatedthephotoreffa

8、ctivepropertiesofnear—stoichiometriclithiumuiobatecrystalsdopedwithFeTherespondingtimeinnearstoichiometricimndopedlithiumniobatecrystalsisahalfsmallerthesensitivityisenhanced23times，andcouplingcoefficientis3～4timeshigher

9、thanthatofcongruentonesTherespondingtimeinnearstoichiometricCO—dopedlithiumniobatecrystalshasseveralsecondsInchapterfive，weinvestigatedthefluorescenceintensityofnearstoichiometriclithiumuiobatecrystalsdopedwithErTheemiss

10、ionintensityofEr3innearstoichiometriclithiumniobateCO—dopedwithMgandEris72timeshigherthanthatofthecongruentoneKeywords：lithiumniobate，nearstoichiometry，VTE(vaportransmittanceequilibration)，photorefractiveresistance，photo