论文标题
Rb d $ _1 $线的磁诱导的原子过渡的特征，由Doppler-Free方法研究基于吸收光谱的第二个衍生物
Features of Magnetically-induced atomic transitions of Rb D$_1$ line studied by Doppler-free method based on the second derivative of the absorption spectra
论文作者
论文摘要
我们表明，RB原子蒸气的吸收光谱的第二个衍生物（SD）技术被限制在厚度$ \ ell =λ/2 = 398 $ nm中的纳米孔中，允许实现接近多普勒的光谱光谱。 SD信号响应在过渡概率方面的狭窄线宽和线性性使我们能够在外部横向磁场（0.6至4 kg）中分别研究，大量的原子过渡为$^{85} $ rb和$^{87} $ rb原子。原子过渡$ | f_g，0 \ rangle \ rightarrow | f_e = f_e = f_g，0'\ rangle $，在零磁场（磁性磁性诱导的过渡）下，偶极矩为无效，在磁场增加的概率上显示出巨大的增加。当在蒸气上施加磁场时，我们显示了通过添加耦合激光器在这些过渡上形成黑暗共振的可能性。因此，当耦合激光启用时，探针辐射的传输增加了五倍。理论计算与实验结果非常吻合。
We show that the Second Derivative (SD) technique of the absorption spectra of Rb atomic vapours confined in a nanocell with a thickness $\ell= λ/2=398$ nm allows to achieve close to Doppler-free spectroscopy. Narrow linewidth and linearity of the SD signal response with respect to transition probabilities allow us to study separately, in an external transverse magnetic field (0.6 to 4 kG), a big number of the atomic transitions of $^{85}$Rb and $^{87}$Rb atoms. Atomic transitions $|F_g,0\rangle \rightarrow |F_e=F_g,0'\rangle$, for which the dipole moment is null at zero magnetic field (so-called magnetically-induced transitions), show a gigantic increase in probability with increasing magnetic field. When a magnetic field is applied on the vapour, we show the possibility of forming a dark resonance on these transitions by adding a coupling laser. We hence demonstrate a five-fold increase in the transmission of the probe radiation when the coupling laser is on. Theoretical calculations are in a very good agreement with experimental results.
