Fluorescence of rubidium vapor in a transient interaction regime

Abstract

We have studied modification of the fluorescence spectra of a room-temperature atomic rubidium vapor in the region of 85 Rb and 87 Rb D2 line while changing the temporal rate of linear (triangular) scanning of laser radiation frequency. Increase of the ramping speed over certain value (≈ 10 6 MHz/s) results in essential modification of magnitudes of individual atomic transitions, different on rising and falling slopes, which characterize transition from a steady-state interaction regime to a transient one. Our experimental results are well consistent with the developed theoretical model. The obtained results can be used for determination of atomic system parameters such as ground-state relaxation rate. Possible follow-up actions on addressed control of atomic levels population is discussed.

Observation of optical Rabi oscillations in transmission signal of atomic vapor under continuous-wave laser excitation

“…(see e.g. [26]), where d ij is the transition dipole moment, 0 is the vacuum permittivity, n is the refractive index, c is the speed of light, S is the effective area of the laser beam cross-section, and ∆ is the detuning of the laser radiation frequency from the atomic transition (including also Doppler broadening and the spectral linewidth of laser radiation when it exceeds transition natural linewidth). The main contribution in the Doppler-overlapped (≈ 640 MHz FWHM) hyperfine transition group 85 Rb F g =3 → F e =2,3,4 gives the cycling transition F g =3 → F e =4, having a strength factor, which exceeds the strength factors of F g =3 → F e =3 and F g =3 → F e =2 by factors of 2.3 and 8.1, respectively.…”

Transition cancellations of $^{87}$Rb and $^{85}$Rb atoms in a magnetic field setting new standards

“…Laser spectroscopy of atomic vapors of alkali metals (Na, K, Rb, Cs) is widely used in atomic physics and numerous emerging applications, including quantum information, optical metrology, laser and sensor technologies, etc. [1,2,3]. Interest in such single-electron atomic media is caused by the simplicity of energy levels and the presence of strong optical transitions in the visible and near infrared, for which narrow-linewidth cw lasers are widely available.…”