Work

Two-photon-excited fluorescence spectroscopy of Rb atoms in a magneto-optical trap

Year: 2026

Type: article

Abstract: We report the results of two-photon-excited fluorescence (TPEF) measurements of the 5 S 1 / 2 → 5 D 5 / 2 transition of Rb 85 and Rb 87 cooled in a magneto-optical trap. We observe TPEF at excitation powers as low as 1 μ W or fluxes as low as 2.98 − 0.94 + 1.37 × 10 18 photons cm − 2 s − 1 ( Rb 85 ) and 3.31 − 1.33 + 2.21 × 10 18 photons cm − 2 s − 1 ( Rb 87 ). Our results demonstrate that optically cooled Rb is a promising platform for observing sensitive two-photon spectral signatures at low photon fluxes.

Source: Physical Review Applied

DOI: 10.1103/c8gq-zp19