Optical absorption resonances of trapped particles

M. E. J. Friese, J Enger, Halina H. Rubinsztein-Dunlop +1 more

E. V. Baklanov, Е. А. Титов, V. A. Ulybin

The two-photon absorption line profile in a standing wave field is found for particles captured in a three-dimensional trap. When the transverse dimension of the optical beam is comparable with the size of the trap, transit broadening is eliminated and the line profile is that of a resonance having the homogeneous width. For optical beams of small dimensions, homogeneous-width resonances occur in the line profile if the frequency of the ion oscillations in the trap is greater than the homogeneous width.

C. Gabbanini

Е. А. Титов, V. A. Ulybin

An investigation is made of the two-photon absorption line profile in a standing-wave field for particles trapped in an oscillator potential at right angles to the optical beam. It is found that this profile is an equidistant lattice of resonances if the oscillation frequency and the amplitude of the ion thermal oscillations are greater than the homogeneous line width and the size of the optical beam, respectively. Allowance for the thermal quadratic Doppler and Stark effects results in broadening of each resonance and changes its profile. A new method of eliminating thermal broadening of the spectral components of the line profile is discussed

E. V. Baklanov, Е. А. Титов

A study is made of the intensity of a resonance with homogeneous width, which appears at the center of an absorption line for particles trapped in a potential well. A calculation is made of the dependence of the amplitude of the resonance on geometric factors (such as the orientation of a light beam relative to the symmetry axes of the well) and on the anharmonicity.

Thalyta Tavares Martins, Sérgio Ricardo Muniz