摘要
讨论了各向异性光子晶体中Λ型三能级原子的辐射性质.研究发现,原子上能级与光子晶体带边的相对位置和两低能级相对位置将直接影响原子的动力学性质及其周围辐射场的性质.通过数值计算和理论分析,得到了光子晶体中原子周围辐射场在不同位置随时间演化的图像,并讨论了光子晶体对原子辐射谱的影响.
The spontaneous emission properties of a Λ-type atom embedded in anisotropic photonic crystals are investigated. We find that the dynamical properties of the atom and the propagating characteristics of the radiation field are obviously influenced by the relative position of the upper level from the forbidden gap and the space between the two lower levels. With the help of numerical calculation and theoretical analysis, we plot the evolution of the total radiation field and its components with the time. Furthermore, we also study the influence of photonic crystals on radiative properties of the atom by means of spontaneous emission spectrum.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第2期696-703,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:90203007
60507008)
上海市启明星跟踪计划(批准号:04QMH1407)
同济大学理科发展基金资助的课题.~~
关键词
光子晶体
辐射场
辐射谱
photonic crystals, radiation field, radiative spectrum
