29676.負(fù)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(xué)碩士研究生學(xué)位論文負(fù)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(xué)信息光子技術(shù)廣東省高校重點(diǎn)實(shí)驗(yàn)室)學(xué)號(hào)：2011021527院系：信息光電俐支學(xué)院專業(yè)：光學(xué)研究方向：光信息傳輸與處理導(dǎo)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