Improved Wavelength Measurement of 2S1/2→2P1/2 and 2D3/2→3[3/2]1/2 Transitions in Yb+

Isolated core excitation of high orbital quantum number Rydberg states of ytterbium

“…On figure 3 is plotted the measured ratio of autoionized atoms R ai = N ai /N tot against the detuning to the 6s 1/2 → 6p 1/2 transition of the bare 174 Yb + ion. Its frequency can be found in [12] and more recently in [13] which provides the value we used of 811.291 500(40)THz for 174 Yb. As expected, we notice a decrease of the autoionization linewidth and of the overall shift compared to the bare ion core (IC) transition with l. This is a clear signature of the decreasing influence of the Yb + ionic core.…”

“…Another significant error for the center frequency shifts is the absolute uncertainty on the knowledge of the 6s 1/2 → 6p 1/2 frequency of ytterbium ion. This adds a 40 MHz error [13].…”

“…The experimental results compare very well with the theoretical ones especially at low l. At larger l the growing mismatch is probably linked to the appearence of the asymmetry in the spectra. Another explanation, not explored here, is the possibility for the Rydberg electron to interact not with just one core electron but with 2 and couple to the ion core state | 4f 13 ( 2 F 7/2 )5d6s( 3 D), K = 3/2, J = 5/2 at only around 9 THz below | 4f 14 6p 1/2 . Orbital quantum number l We recall our motivation to evaluate the feasibility of non destructive imaging of Rydberg atoms by fluorescence of the IC.…”

Controlling Rydberg excitations using ion core transitions in alkaline earth atom tweezer arrays

“…To better understand and quantitatively model the properties of the |r → |r transition, we measure the light shift and scattering rate of |r in the presence of the 369 nm control beam with variable detuning from the Yb + resonance at f + = 811.29150(40) THz (Fig. 2a) [31]. The light shift, ∆ LS , is extracted from the resonance shift of the |g → |r transition, while the scattering rate, Γ LS , is measured from the lifetime of |r [23], assuming that most scattering events result in autoionization of the atom.…”

A Coherent Light Shift on Alkaline-Earth Rydberg Atoms from Isolated Core Excitation without Auto-Ionization

“…The Rydberg and ICE laser light are produced by frequency-doubling two dedicated Ti:sapphire sources; the source frequencies are controlled by piezoelectric actuators, and measured by a wavemeter with a ∼ 1 MHz short term precision and a ∼ 100 MHz long term accuracy. The Rydberg frequency, denoted f Ryd , is controlled by software means, while the ICE frequency f ICE is tuned manually in the vicinity of the 6s 1/2 ↔ 6p 1/2 ion transition frequency, f ion = ω ion / (2π) = 811.291500 (40) THz [62], and left free-running between manual corrections of its drift. The transverse sizes of the three beams at the atom cloud location, described by the waist radii w 6p , w Ryd and w ICE , are adjusted using telescopes and/or focusing lenses prior to injection into the vacuum chamber.…”