Spectroscopy of a narrow-line optical pumping transition in atomic dysprosium

Abstract

We present measurements of the hyperfine coefficients and isotope shifts of the Dy I 683.731 nm transition, using saturated absorption spectroscopy on an atomic beam. A King Plot is drawn resulting in an updated value for the specific mass shift δν(684,sms)(164-162)=-534±17 MHz. Using fluorescence spectroscopy, we measure the excited state lifetime τ684=1.68(5) μs, yielding a linewidth of γ684=95±3 kHz. We give an upper limit to the branching ratio between the two decay channels from the excited state showing that this transition is usable for optical pumping into a dark state and demagnetization cooling.

Measurement of the dynamic polarizability of Dy atoms near the 626-nm intercombination line

“…( 5), the results can again be found in Table I. Notably, we extract αbg = 277 (13), which is consistent with the offset on the scalar component given before. With the definition of α0 we find the relation…”

“…Table I summarizes the fitting results. Notably, αs includes a background of 275 (13), originating from other transitions, mostly the strong blue line near 421 nm. In contrast, the background in αt is only 8 (14), which is consistent with 0.…”

“…Submerged-shell lanthanide atoms offer a multitude of optical transitions, which provide flexible tools for efficient laser cooling and trapping [9][10][11][12] and which open up a broad range of applications based on the optical manipulation of atoms. Examples include optical pumping [13], the excitation of Rydberg states [14], realization of spin-orbit coupling [15], atomic clock applications [16], quantum-enhanced sensing [17,18], and quantum spin models [19]. The wide range of applications has motivated theoretical [20][21][22][23] and experimental [24][25][26][27][28][29][30] studies on the dynamic polarizability, which is the key quantity that characterizes the strength of the atomic interaction with laser light.…”

Observation of the 162Dy–164Dy Isotope Shift for the 0 → 16 717.79 cm−1 Optical Transition

“…Recently, rare earth elements have been the subject of many investigations in the laser cooling and trapping area. 13–18 Dysprosium, due to its high magnetic dipole moment (10 μB ), 19 has proven to be a great element for application in these studies. Recent works reported magneto-optical traps for Dysprosium.…”

“…41 Schmitt et al. 19 recently investigated the line 683.731 nm of dysprosium which has application in the laser cooling area. Leefer et al.…”