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光电学院纳米光子学团队非线性光学材料上取得新进展

时间: 2019-09-04浏览: 217编辑: 董真摄影:     通讯员: 设置

jinri,weilaiguangxueguojishiyanshixiadenamiguangzixuetuanduicaibinjiaoshouzaifeixianxingguangxuecailiaoshangqudexinjinzhan,zaizhimingqikan《acs photonics》(sciyiqu)shangyi“dast optical damage tolerance enhancement and robust lasing via supramolecular strategy”(jiyuchaofenzijiegoudedastguangsunshangyuzhizengqianghewendingdejiguangjishe)weitifabiaofengmianwenzhang。guangdianxueyuanboshiyanjiushengtiantianweigailunwendiyizuozhe。

188体育平台youjifeixianxingguangxuejingtidast(4-[4-(dimethylamino) styryl]-1- methyl-pyridinium tosylate)juyoubichuantongwujifeixianxingjingtirunisuanli(linbo3)denggao1-2geshuliangjideerjiefeixianxing,zaitaihezibojifa、tance,tongxunlingyudechaogaosudianguangdiaozhiyijijiguangbozhangzhuanhuandengzhuduoyingyonglingyuyinqileguangfanguanzhu。danzhangqiyilai,chezhouyudastjingtiguangsunshangyuzhidixia,qifazhanyuyingyongshoudaolehendadezhiyue。

为突破以上瓶颈,研究团队利用具有桶装结构的环糊精(β-CD)分子对条状的DAST分子进行包覆,形成DAST@β-CD超分子体系,利用β-CD分子的位阻效应成功地抑制了DAST分子的光分解。而且,超分子包覆可以有效消除浓度消光效应对DAST光致发光性能的负面影响,荧光量子效率可提高约10倍。在此基础之上,通过二次培养法成功制备出高质量的DAST@β-CD 超分子晶体纳米线(NWs)、微晶(MPs)和混晶(CMCs)。研究表明这些DAST@β-CD超分子晶体不仅具备与原DAST晶体相当的二阶非线性,而且兼顾了优良的荧光特性与光稳定性。利用此特点,课题组在DAST@β-CD微晶上实现了低阈值单模激光信号的输出,在混晶上实现了随机激光信号输出。在敞开空气环境下, 532 nm皮秒激光以17.5 GW / cm2的峰值功率密度(该值比DAST晶体光漂白阈值高8-9个数量级)连续照射晶体4小时,仍然能维持95%的激光信号强度,显示了极高的光稳定性。

benyanjiuzhibeidedast@β-cd chaofenzijingti,zaijichengledastjingtierjiefeixianxingdetongshi,jiangulejigaodenaiguangxingheyingguangfaguangtexing,zheibujindadatuozhanledastjingtizaifeixianxingguangxuelingyudeyingyongfanwei,erqiejidadifengfulejingtizishendewulineihan,weiduowulichangdexianghuzuoyong、diaozhitigonglejihaodewuzhijichu。benchengguotecibei《acs photonics》linxuanwei2020nian8yue7juan8qidefengmianwenzhang。guangdianxueyuanyuanshuai、liminheyouguanjundengduoweilaoshizaiketiyanjiutuijinguochengzhongjiyulebangzhuyuzhidao。


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供稿: 光电学院

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