[17a-K209-1~8] 1.5 Instrumentation, measurement and Metrology

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[17a-K209-3] Spectroscopy of ²S_1/2 - ²D_3/2 transition in single ¹⁷¹Yb⁺ ions cooled three-dimensionally

〇Kazuhiko Sugiyama^1,2, Takahiro Enomoto¹, Seiryu Ando², Yasutaka Imai³ (1.Grad Sch Kyoto Univ., 2.Kyoto Univ., 3.Okayama Univ.)

Keywords:

ion trap,ytterbium ion,optical clock

We conduct the spectroscopy of the ²S_1/2(F=0) - ²D_3/2(F=2) clock transition at 435 nm in single ¹⁷¹Yb⁺ ions, which are confined in a RF trap and three-dimensionally cooled. We simplify the structure of the spectrum by driving only the m_F=0 to m_F'=2 & -2 Zeeman components. This is done by adjusting the direction of the magnetic field and the polarization of the clock laser. Then we are trying to improve the signal-to-noise ratio in the spectra. At present, we observed the spectra with a Lamb-Dicke parameter of ~1.5, corresponding to the temperature of ~2 mK.