掺二氧化钛微晶聚集体的若丹明6G溶液的低阈值激射  

Low threshold lasing of rhodamine 6G solution embeded with TiO2 nanocrystal aggregate

作　　者：汪河洲[1,2] 赵福利[1,2] 何拥军 黄旭光[1,2] 

机构地区：[1]中山大学超快速激光光谱学国家重点实验室 [2]中山大学化学系

出　　处：《激光杂志》1998年第1期27-31,共5页Laser Journal

基　　金：国家863-416高技术资助;广东省自然科学基金

摘　　要：本文实验表明，在若丹明６Ｇ染料溶液存在二氧化钛微晶团聚体形成的聚集体时，染料溶液的激射阈值比纯净的染料溶液的激射阈值降低２０多倍。激射脉宽接近激发激光脉宽，激射谱带很窄并随激发强度增大而稍微红移和稍微增宽。本文讨论了这种低阈值激射的机制。The experimental resuts in this paper show that the lasing threshold of rhodamine 6G solution,in which TiO2 nanocrystal aggregate is embeded,is significantly reduced compared to that of a neat dye solution.The lasing spectral bandwidth of rhodamine 6G solution embeded with TiO2 nanocrystal aggregate is very sharp,and its peak wavelength redshifts slightly according to the increasement of pump density.The emission duration is as short as the pump pulse duration.The mechanism of this low threshold lasing is discussed.

关 键 词：激射阈值 激射光谱 微晶聚集体 激光染料 

分 类 号：TN244[电子电信—物理电子学]