理想腔中具有正交偶极矩的级联型三能级原子发射谱

Emission spectrum of a cascade three-level atom with orthogonal dipoles interacting with a single-mode field

假设原子具有两正交跃迁电偶极矩,运用全量子论研究了与单模电磁场共振相互作用的等距三能级原子的发射谱.对不依赖于场强耦合和依赖强度耦合两种情况分别进行了发射谱的计算,并比较了原子偶极矩正交和平行条件下发射谱的异同.结果表明,一般情况下,具有平行偶极矩的原子的发射谱谱线少于具有正交偶极矩的原子的谱线,一些谱线由于干涉而消失.

Under the assumption of orthogonal electrical dipole moments of a cascade three-level atom with equally spaced energy levels, the full quantum theory is applied to study the emission spectrum of the atom interacting resonantly with a single-mode electromagnetic field in an ideal cavity. Spectral calculations for both the intensity-dependent and intensity-independent couplings are performed and the spectra in the cases of orthogonal dipole moments and parallel dipole moments are compared. It is found that some spectral lines disappear for the atom with parallel dipoles due to destructive interference leading to fewer lines compared with the spectrum of the atom with orthogonal dipole moments.