Selective reflection in a nanometric cesium cell resolves the hyperfine lines of the 6s 2S1/2 to 7p 2P3/2 transition at 456 nm with a linewidth near 27 MHz, about 30 times below the Doppler width.
How- ever, for more precise results, α reads α = N t10Ei 4ℏε0F |deg|2, (12) where N is the vapor density and deg is the transition dipole moment
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Doppler-free Selective Reflection spectroscopy of the $6s$ $^2S_{1/2} \to 7p$ $^2P_{3/2}$ transition of Cesium using a nanofabricated vapor cell
Selective reflection in a nanometric cesium cell resolves the hyperfine lines of the 6s 2S1/2 to 7p 2P3/2 transition at 456 nm with a linewidth near 27 MHz, about 30 times below the Doppler width.