A thermal atomic beam of dysprosium atoms is cooled using the $4{f}^{10}6{s}^{2}(J=8)\ensuremath{\rightarrow}4{f}^{10}6s6p(J=9)$ transition at $421$ nm. The cooling is done via a standing light wave orthogonal to the atomic beam. Efficient transverse cooling to the Doppler limit is demonstrated for all observable isotopes of dysprosium. Branching ratios to metastable states are demonstrated to be $<$ $5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$. A scheme for enhancement of the nonzero-nuclear-spin-isotope cooling and a method for direct identification of possible trap states are proposed.A thermal atomic beam of dysprosium atoms is cooled using the $4{f}^{10}6{s}^{2}(J=8)\ensuremath{\rightarrow}4{f}^{10}6s6p(J=9)$ transition at $421$ nm. The cooling is done via a standing light wave orthogonal to the atomic beam. Efficient transverse cooling to the Doppler limit is demonstrated for all observable isotopes of dysprosium. Branching ratios to metastable states are demonstrated to be $<$$5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$. A scheme for enhancement of the nonzero-nuclear-spin-isotope cooling and a method for direct identification of possible trap states are proposed.

arXiv:0912.2133Physical Review AApr 29, 201030 citations

Construction of an External Cavity Laser and Reference Cavity for addressing Dysprosium

Christopher Hayton

The goal of this Masters project is to construct a laser system to facilitate future experiments with atomic Dysprosium via the transition at 421.29 nm. Dysprosium is of interest due to its magnetic properties, namely that it is tied with Terbium as the most magnetic element. Although there have been a number of investigations into laser cooling and trapping clouds of Dysprosium atoms, we would like to (in the future) interact with and manipulate individual atoms of Dysprosium. The first step towards this is to construct a laser system capable of interacting with the atom/s. To this end, an External Cavity Diode Laser (ECDL) operating at 421.29 nm and an optical reference cavity mounted in a vacuum are designed, constructed, and implemented.The goal of this Masters project is to construct a laser system to facilitate future experiments with atomic Dysprosium via the transition at 421.29 nm. Dysprosium is of interest due to its magnetic properties, namely that it is tied with Terbium as the most magnetic element. Although there have been a number of investigations into laser cooling and trapping clouds of Dysprosium atoms, we would like to (in the future) interact with and manipulate individual atoms of Dysprosium. The first step towards this is to construct a laser system capable of interacting with the atom/s. To this end, an External Cavity Diode Laser (ECDL) operating at 421.29 nm and an optical reference cavity mounted in a vacuum are designed, constructed, and implemented.

Jan 1, 20240 citations

Toward laser cooling of negative lanthanum

J. E. Jordan, G. Cerchiari, Stefan Erlewein +1 more

Bulletin of the American Physical SocietyMay 26, 20160 citations

Laser Cooling of Erbium Atoms

Jabez J. McClelland, H Ban, Marcus Jacka +2 more

Bulletin of the American Physical SocietyMay 18, 20050 citations

Spectroscopy of a narrow-line laser-cooling transition in atomic dysprosium

Mingwu Lu, Seo Ho Youn, Benjamin Lev

The laser cooling and trapping of ultracold neutral dysprosium has been demonstrated recently using the broad, open, 421-nm cycling transition. Narrow-line magneto-optical trapping of Dy on longer wavelength transitions would enable the preparation of ultracold Dy samples suitable for loading optical dipole traps and subsequent evaporative cooling. We have identified the closed 741-nm cycling transition as a candidate for the narrow-line cooling of Dy. We present experimental data on the isotope shifts, the hyperfine constants $A$ and $B$ , and the decay rate of the 741-nm transition. In addition, we report a measurement of the 421-nm transition's linewidth, which agrees with previous measurements. We summarize the laser-cooling characteristics of these transitions as well as other narrow cycling transitions that may prove useful for cooling Dy.The laser cooling and trapping of ultracold neutral dysprosium has been demonstrated recently using the broad, open, 421-nm cycling transition. Narrow-line magneto-optical trapping of Dy on longer wavelength transitions would enable the preparation of ultracold Dy samples suitable for loading optical dipole traps and subsequent evaporative cooling. We have identified the closed 741-nm cycling transition as a candidate for the narrow-line cooling of Dy. We present experimental data on the isotope shifts, the hyperfine constants $A$ and $B$, and the decay rate of the 741-nm transition. In addition, we report a measurement of the 421-nm transition's linewidth, which agrees with previous measurements. We summarize the laser-cooling characteristics of these transitions as well as other narrow cycling transitions that may prove useful for cooling Dy.

arXiv:1009.2962Physical Review AJan 18, 201158 citations

A thermal atomic beam of dysprosium atoms is cooled using the $4{f}^{10}6{s}^{2}(J=8)\ensuremath{\rightarrow}4{f}^{10}6s6p(J=9)$ transition at

421

nm. The cooling is done via a standing light wave orthogonal to the atomic beam. Efficient transverse cooling to the Doppler limit is demonstrated for all observable isotopes of dysprosium. Branching ratios to metastable states are demonstrated to be

<

$5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$. A scheme for enhancement of the nonzero-nuclear-spin-isotope cooling and a method for direct identification of possible trap states are proposed.

A

and

B

, and the decay rate of the 741-nm transition. In addition, we report a measurement of the 421-nm transition's linewidth, which agrees with previous measurements. We summarize the laser-cooling characteristics of these transitions as well as other narrow cycling transitions that may prove useful for cooling Dy.