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We report recent improvement in absolute frequency measurement of the 115In+5s21S0-5s5p 3P0 clock transition at 236.5 nm. Using a narrowline laser as a local oscillator, a linewidth of 43 Hz for the transition is resolved. The uncertainty of the transition frequency's centroid is 18 Hz, leading to a fractional uncertainty of 1.4 x 10-14. In the experiment, a single 115In+is trapped in a three-ring...
We report on the current status of the optical frequency standard based on a single 115In+ ion. A single indium ion is being trapped in a Paul-Strauble type trap and cooled in combination of Doppler cooling and sideband cooling to its lowest vibrational states. To interrogate the 1S0-3P0 clock transition with high accuracy we demonstrate a Hz-level laser system resonant to this transition. With the...
A single indium ion is being trapped and cooled via sideband cooling to its lowest vibrational states.We demonstrate a Hz-level laser system which is capable of measuring the 115In+1S0-3P0 clock transition with high accuracy.
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