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- W2290134543 abstract "We identify an inverted Lamb dip in the saturated absorption spectroscopy of the $(6s^{2})$ $^{1}S_{0}$ $-$ $(6s6p)$ $^{3}P_{1}$ transition in $^{171}$Yb. The signal has only been observed with the two hyperfine lines of this spin $I=frac{1}{2}$ isotope. For both lines the application of a dc magnetic field transforms a two-level scheme into a four-level scheme, with degeneracy only marginally lifted in the ground state. The atoms are excited through $pi$ transitions, while the de-excitation process completes a simple optical pumping scheme. However, the full explanation of the enhanced absorption is yet to be determined. The anomalous absorption signal is used to generate a dispersive curve for 556 nm laser stabilisation and the stabilised light cools $^{171}$Yb atoms in a two-stage magneto-optical trap, achieving temperatures below 50 $mu$K. The Doppler-free spectroscopy scheme is further used to measure isotopic frequency shifts and hyperfine separations for the intercombination line in Yb." @default.
- W2290134543 created "2016-06-24" @default.
- W2290134543 creator A5065403426 @default.
- W2290134543 date "2016-03-03" @default.
- W2290134543 modified "2023-09-27" @default.
- W2290134543 title "Anomalous saturated absorption providing a stable laser lock for $^{171}$Yb laser cooling" @default.
- W2290134543 hasPublicationYear "2016" @default.
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