PHOTON ABSORPTION AND SCATTERING IN FANO ANTIRESONANCES
PHOTON ABSORPTION AND SCATTERING IN FANO ANTIRESONANCES
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DOI：
10.1080/00268977400100061
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发表时间：
1974-01-01
影响因子：
1.7
通讯作者：
NITZAN, A
中科院分区：
文献类型：
--
作者：
NITZAN, A
利用格林函数方法得到了Fano线形问题的一种修正处理方法，该方法考虑了连续(或准连续)非辐射流形中不同态与相同辐射场的相互作用而产生的耦合。得到了吸收线形的新表达式：σa(∈)∞[(∈+qYl)2+(∈2+1)(1-yl)]/(∈2+1)，其中∈是约化能量参数，qis Fano线形指数，Yl是非辐射流形被光学禁止时获得的非辐射量子产额。由于YL总是小于单位，与法诺近似得到的结果相比，吸收永远不会严格地消失。此外，还得到了Fano共振中的发射线形状和(能量相关)发射量子产额的表达式。这样得到的量子产额不存在表征在法诺近似中获得的相同量的奇异行为。
The Green's function method is utilized to obtain a modified treatment of Fano's line-shape problem which takes into account the coupling between different states in the continuous (or quasi-continuous) non-radiative manifold due to their interaction with the same radiation field states. A new expression for the absorption line-shape is obtained in the form σa(∈)∞[(∈+qYL)2+ (YLq2+ 1)(1 -YL)]/(∈2+ 1), where ∈ is the reduced energy parameter,qis Fano's line-shape index andYLis the non-radiative quantum yield obtained when the non-radiative manifold is optically forbidden. AsYLis always smaller than unity, the absorption never strictly vanishes in contrast to the result obtained in Fano's approximation. In addition, expressions are obtained for the emission line-shape and for the (energy dependent) emission quantum yield within a Fano resonance. The quantum yield so obtained is free from the singular behaviour which characterizes the same quantity obtained in Fano's approximation.