Abstract The spontaneous emission spectrum from a four-level atom in a double-band photonic crystal has been investigated. We use the model which assumes three atomic transitions. One of the transitions interacts with the free vacuum modes, and the other two transitions couple to the modes of the isotropic photonic band gap (PBG), the anisotropic PBG and another free vacuum. The effects of the fine structure of the lower levels on the spontaneous emission spectrum of an atom are investigated in detail in the three cases. New features of four (two) transparencies with two (one) spontaneous emission peaks, resulting from the fine structure of the lower levels of an atom, are predicted in the case of isotropic PBG modes.
Received: 16 October 2003
Revised: 30 September 2004
Accepted manuscript online:
Fund: Project supported by the Scientific Research Foundation of the State Education Ministry for Chinese Scholars, China, and the Innovative Research Foundation of Jilin University.
Cite this article:
Wang Jian (王健), Yang Dong (杨冬), Zhang Han-Zhuang (张汉壮) Spontaneous emission spectrum of a four-level atom in a double-band photonic crystal 2005 Chinese Physics 14 323
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