D2-Line Spectroscopy of Potassium Atoms in an Optical Nanocell

A. Gopalan, Edith Leber, Jürgen Bömmels +4 more

Armen D. Sargsyan

Armen D. Sargsyan, A. Amiryan, T. A. Vartanyan +1 more

Abstract A nanocell filled with atomic vapors of rubidium and potassium was used to develop a modified method of Faraday rotation. The formed lines are characterized by a spectral width that is a factor of 1.5‒2 smaller than those obtained by traditional method of Faraday rotation in nanocells. The new method allows obtaining the spectral width of atomic line that is 8 times smaller than the Doppler broadening in the case of the D2 line of rubidium and 15 time smaller than the Doppler broadening in the case of the D1,2 lines of potassium. In magnetic fields B = 100−1200 G, all atomic lines of Rb and K atoms are spectrally resolved and identified. In the case of the D2 line of Rb, it is demonstrated that the probabilities of magneto-induced transitions (87Rb, Fg = 1 → Fe = 3 and 85Rb, Fg = 2 → Fe = 4) can exceed the probabilities of the allowed transitions. Convenience and efficiency of the modified method of Faraday rotation for high-resolution spectroscopy is demonstrated.

Arman Davtyan, M. E. Movsesyan, A. Papoyan +1 more

E. Mariotti, Alen Khanbekyan, Alen Khanbekyan +7 more

We present for the first time the results of the sub-Doppler spectroscopy realized with a nanocell filled with a Sodium metal. The thickness L of the gap between the windows (which determines the length of the atomic vapor column) has a wedge in the vertical direction varying from 100 to 900 nm. It is demonstrated that the use of a nanocell with the thickness L=lambda/2 and L=lambda, where lambda is the wavelength of the dye laser radiation resonant with D2 line of Sodium, allows one to provide sub-Doppler spectroscopy of the Transmission and Fluorescence spectra of D2 lines of Sodium (lambda ~ 590 nm). A cw dye laser radiation with the linewidth of ~1 MHz and tunable in the range of several GHz has been used

Jin‐Tae Kim