1、湖北大學(xué)碩士學(xué)位論文脈沖激光沉積法制備硫鹵玻璃薄膜的工藝及光學(xué)性能研究姓名：夏敏申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：章天金20090501AbstractRecentlyGeSe2Ga2Se3—KBrchalcogenideglassesfilmshaveattractedmuchattentionaccordingtotheirpossibleapplicationsasintegratedmaterials、opticalcom

2、municationsandotherfieldsEndowedwithprioritiesoflowPhononenergy、highrefractiveindex、beingeasytobepreparedandproeessed、bigseeondordernonlinearsusceptibilityetalChaleogenideglasseshavebeenrankedasakindofopticalmaterialwith

3、manypotentialapplicationsInthispaperbulkyglasswithcompositionofwasprearedusingconventionalfusingquenchingmethod，itwassubsequentlyusedaStargetforPLDWithPLDmethod，wedepositedchalcogenidefilmandcharaeterizeditwithXRD(X—rayd

4、iffaction)、Transmittancetest、SEM(Scanningelectronicmicroscopic)、Ramanspectra、XRF(Xrayphotoelectronspectroscopy)、profilemeterCharacterizationresultsindicatedthattheaspreparedfilmwasamorphous，ofhomogeneoustextureItsthickne

5、ssreachedto1000nanometersIthaveashort—cutwavelengthplacedatabout530nm，itsaveragetransmittancewashigherthan75％Comparedwiththetargets，thestructuresofthefilmdifferedlittle，itscompositionwasalittlediscrepant，butnotSOobviousT

6、hecolorofthinfilmsisdarkyellowwhilethecolorsgruduallychangetolightyellowwiththeincreaseofthecontentofKBrThemicrostructureoftheGeSe2Ga2Se3KBrfilmsisconsideredasfollowing：thenetworkconsistsofthe[GeSe4】and【GeSe4】tetralledra

7、lconnectedbybridgedSe；theadditionalbromineatomswillreplacesomepartialseleniumatomsasthenet—terminatorwhichleadtotheformationof【Se3GaBr]。newstructureunit，Kionsenterintotheglassnetwork，itplayaroleofadjustmentAfterannealing

8、opticalbandgapenergyoffilmsincreasedTheopticalabsorptionedgeshiftedtothelongwavelengthTherefractiveindexoffilmsreduced，itgraduallyreducedwiththeincreaseofthecontentofKBLThefilmsirradiatedbylaserwith248nmoccurphotoinduced

9、—darkeningphenomenonOpticalbandgapenergyoftheilluminatedfilmsreducedTheopticalabsorptionedgeshiftedtotheshort—wavelengthThevolumeisexpandedAfterirradiationThechangeisveryobviouswiththeincreasingofthetimeofilluminationRef