收稿日期: 2016-06-06
网络出版日期: 2018-06-27
基金资助
国家自然科学基金资助项目(11172163);国家自然科学基金资助项目(11372175);上海市重点学科建设资助项目(S30106);上海市教委e-研究院建设计划资助项目;上海市高校创新团队建设资助项目
Attenuation characteristics of Gaussian beams passing through a granular system
Received date: 2016-06-06
Online published: 2018-06-27
为提高有机发光二极管(organic light-emitting diode,OLED)真空镀膜有机发光材料的沉积效率和利用率,研究了受光束约束的有机发光材料蒸汽和聚焦高斯光的相互作用.对有机发光材料做颗粒化处理, 并将其形貌等效为球体,通过Lorenz-Mie理论得到经过多粒子体系后高斯光束能量的的衰减规律.结果表明, 表征光束能量的坡印廷矢量在轴向呈指数衰减状态,其特性受到光学、颗粒及其共同作用特征的影响;进一步的分析给出了光能衰减规律的关系式,该关系式能够较好地反演计算数据,并和已有研究在物理上保持了较好的一致性.
关键词： 广义Lorenz-Mie理论; 消光特性; 真空热蒸发; 多粒子体系; 颗粒气体
王涵, 周哲玮, 张金松, 张建华, 王志亮 . 高斯光束通过颗粒系统的衰减特征[J]. 上海大学学报(自然科学版), 2018 , 24(3) : 392 -401 . DOI: 10.12066/j.issn.1007-2861.1821
Vacuum deposition is an essential coating process to form organic light-emitting diode (OLED) film luminescent layers. Vapor of organic polymers is treated as a spherical particle systems (granular gas). A laser beam is proposed to improve their utilization rate when casting organic polymers. The Lorenz-Mie theory is used to investigate interactions between the Gaussian beam light and granular gas. The energy is found to decay exponentially, which is affected by many factors, e.g., beam waist radius, particle size parameters or refractive index. A formula of decay law is derived and analyzed to well recover the simulated data, and is consistent with the known behaviors and relations physically.
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