Optogalvanic spectroscopy of metastable states in Yb+

Abstract

The metastable 2 F 7/2 and 2 D 3/2 states of Yb + are of interest for applications in metrology and quantum information and also act as dark states in laser cooling. These metastable states are commonly repumped to the ground state via the 638.6 nm 2 F 7/2 -1 D[5/2] 5/2 and 935.2 nm 2 D 3/2 -3 D[3/2] 1/2 transitions. We have performed optogalvanic spectroscopy of these transitions in Yb + ions generated in a discharge. We measure the pressure broadening coefficient for the 638.6 nm transition to be 70 ± 10 MHz mbar −1 . We place an upper bound of 375 MHz/nucleon on the 638.6 nm isotope splitting and show that our observations are consistent with theory for the hyperfine splitting. Our measurements of the 935.2 nm transition extend those made by Sugiyama et al., showing wellresolved isotope and hyperfine splitting (Sugiyama and Yoda in IEEE Trans. Instrum. Meas. 44: 140, 1995). We obtain high signal-to-noise, sufficient for laser stabilisation applications (Streed et al. in Appl. Phys. Lett. 93: 071103, 2008).

Spectroscopy of the S1/22→P3/22Feldker1, Fürst2, Ewald3 et al. 2018Phys. Rev. A11040View full textAdd to dashboardCite

“…With a hyperfine splitting of the 2 F 7/2 state of 3620(2) MHz [14], we determine an energy splitting of the upper 1 D [5/2] 5/2 state of 320 (20) MHz and a hyperfine constant A( 1 D [5/2] 5/2 ) = −107(6) MHz. There seems to be no previous experimental data available for the 1 D [5/2] 5/2 hyperfine splitting, only a theoretical estimation of A = 199 MHz [31], which deviates significantly from the value we find in the experiment.…”

Hyperfine structure of $^{173}\mathrm{Yb}^+$: toward resolving the $^{173}\mathrm{Yb}$ nuclear octupole moment puzzle

“…Comparing our computed values (see Table II) with theoretical values by Dzuba and Flambaum [26], we observe that our A values match, while there is a roughly 10% discrepancy in values of B. Itano (cited in Ref. [30]) has previously computed the A and B constants for the 4f 13 6s 2 (J = 7/2) state in 171 Yb + and 173 Yb + . Itano has also used the MCDHF method, but his results are markedly different from ours.…”

“…Since there are no details of calculations given in Ref. [30], it is difficult to assess the reasons for this difference. We, however, point out that our MCDHF results are in a Based on these comparisons we conservatively estimate the uncertainty of our MCDHF calculations to be ∼ 10% for the magnetic dipole and electric quadrupole hyperfine interaction constants.…”

Coupled optical resonance laser locking

“…The elements R ij account for population transfer due to other mechanisms that occur in the hollow cathode discharge. In particular there exists a background population in the metastable 2 D 3/2 level in the plasma [7]. The R ij elements coupling the 2 S 1/2 to 2 D 3/2 levels were used as tuning parameters for the model.…”