Lyman-Alpha高斯柱形光子胚胎的传播模型  

Propagation Model of the Cylindrical Lyman-Alpha Gaussian Photon Embryo

作　　者：刘晓东[1] 宋昭远[2] 侯蓝田[2] 

机构地区：[1]大连民族学院光电子技术研究所,辽宁大连116605 [2]燕山大学红外光纤与传感研究所,河北秦皇岛066004

出　　处：《大连民族学院学报》2007年第5期121-123,共3页Journal of Dalian Nationalities University

基　　金：辽宁省教育厅攻关计划资助项目(2004D254)

摘　　要：定性地提出了Lyman-Alpha(Lyα)光子"胚胎"的高斯柱形模型,按照高斯光束的电磁传播理论,探讨了它在生成早期的传播图象.首先阐述了这种模型的物理原因,研究了Lyα高斯柱形光子"胚胎"的衍射发散程度,得出了与直觉所期望的不一致的结果;随后改进了该模型,提出了两步式传播图象,得出了具有横向光子局域化、衍射距离长、物理上相对合理的光子模型.A cylindrical profile with a Gaussian cross section for the Lyman- Alpha （Lyα） photon ＂embryo＂ is suggested qualitatively, and a propagation picture of the Lyα photon ＂embryo＂ is investigated according to the electromagnetic theory of a Gaussian light beam. After demonstrating the physical reason of this model, we study the diffractive expansion of the Lyα photon ＂embryo＂ and obtain an unphysical outcome about its cross section. Being an improvement of the above - mentioned model, a two - step propagation model is further used to show a physically reasonable photon structure with transverse photon localization and long diffraction distance.

关 键 词：Lyα 光子 光子胚胎 高斯光束 光子局域化 

分 类 号：O413.2[理学—理论物理]