The relaxation of atomic polarization in buffer-gas-free, paraffin-coated cesium vapor cells is studied using a variation on Franzen's technique of ``relaxation in the dark'' [Franzen, Phys. Rev. {\bf 115}, 850 (1959)]. In the present experiment, narrow-band, circularly polarized pump light, resonant with the Cs D2 transition, orients atoms along a longitudinal magnetic field, and time-dependent optical rotation of linearly polarized probe light is measured to determine the relaxation rates of the atomic orientation of a particular hyperfine level. The change in relaxation rates during light-induced atomic desorption (LIAD) is studied. No significant change in the spin relaxation rate during LIAD is found beyond that expected from the faster rate of spin-exchange collisions due to the increase in Cs density.
Diffusion of Rb atoms in paraffin - coated resonant vapor cells
本文报道了Rb原子在涂有石蜡的共振汽泡中扩散的研究结果。我们已经模拟了Rb在电池和涂层中的扩散,假设Rb原子的主要损失是由于玻璃衬底对原子的物理吸收。它表明,在细胞中的平衡原子密度是一个单调函数的石蜡涂层的厚度:密度增加,在涂层的厚度的增加。铷在石蜡薄膜中的扩散系数被确定为4.7 *10^-7 cm ^2/s。实验结果有助于更好地理解碱金属原子与石蜡涂层相互作用过程的细节。
We measured the spin noise spectroscopy (SNS) of rubidium atomic ensemble with two different atomic vapor cells (filled with the buffer gases or coated with paraffin film on the inner wall), and demonstrated the enhancement of signal to noise ratio (SNR) by using of the polarization squeezed state (PSS) of 795 nm light field with Stokes operator S2 squeezed. PSS is prepared by locking the relative phase between the squeezed vacuum state of light obtained by a sub-threshold optical parametric oscillator and the orthogonal polarized local oscillator beam by means of the quantum noise lock. Under…