29676.負型介電各向異性向列相液晶中空間光孤子的理論研究

1、2014年5月華南師范大學碩士研究生學位論文負型介電各向異性向列相液晶中空間光孤子的理論研究Theoreticalinvestigationofspatialopticalsolitonsinnematicliquidcrystalswithnegativedielectricanisotropy李一亨(華南師范大學信息光子技術廣東省高校重點實驗室)學號：2011021527院系：信息光電俐支學院專業(yè)：光學研究方向：光信息傳輸與處理導師

2、：胡巍教授二零一四年五月ABSTRACTABSTRACTInthispaper，wemainlyintroducesomebasicpropertiesofspatialopticalsolitonsinthenonlocalnonlinearmedianematicliquidcrystals(NLCs)withnegativedielectricanisotropynematicliquidcrystalsarenon—linear

3、materialswhichhaveacontrollabledegreeofnonlocality，thephysicalmechanismofnonlinearityofnematicliquidcrystalsisthemoleculereori—entationinducedbyopticalbeamThenonlinearitycamesfromtheinter—actionofmoleculesinliquidcrystal

4、s1_、●●●●’“1revl0USInvestigationsmainlytocusonthesituationthatthedielectricanisotropyofNLCsispositiveWeinvestigatedtheNLCswithnegativedielectricanisotropytheocraticallyIntheNLCswithpositivedielectricanisotropythedirectoro

5、rientationofNLCsmoleculeswillmovetowardtheelectricfielddirectionwhentheNLCsmoleculespolarizedbyexternalelectricfieldbut，intheNLCswithnegativedielectricanisotropythedirectororientationofNLCsmoleculeswillmovetowardthedirec

6、tionthatisperpendiculartotheelectricfielddi—rectionunderthecircumstance，whichwillleadtoaseriesofnewpropertiesofspatialopticalsolitonsTheoreticalresearchshowsthatnegativedielectricanisotropyNLChasanegativenonlinearcoeffic

7、ientTheanalyticalexpressionforcharac—teristiclengthofthenonlocalre—sponsefunction，alongwithexpressionfornonlinearcoefficient，aregivenSec—ilyThesolutionfforpatialpticanonllnearcoetnclentarelvenbecondly1hesolutionstorsData