Physical Review A

Photoassociative production of ultracold heteronuclear ytterbium molecules

Mateusz Borkowski, R. Ciuryło, Paul S. Julienne, Rekishu Yamazaki, Hideaki Hara, Katsunari Enomoto, Shintaro Taie, Seiji Sugawa, Yosuke Takasu, Yoshiro Takahashi

Published Sep 14, 2011• 17 citations

Publisher

Abstract

We report observations of photoassociation (PA) spectra near the intercombination line in isotopic mixtures of ultracold ytterbium gases. Several heteronuclear bound states have been found for the excited ${}^{170}$Yb${}^{174}$Yb and ${}^{174}$Yb${}^{176}$Yb molecules. We develop a single-channel mass-scaled interaction model for the excited state molecule which well reproduces the measured bound state energies. This is an important step toward optical control of interactions in mixtures of ultracold ytterbium gases using heteronuclear optical Feshbach resonances. The model developed is applicable in collisions of other similar systems, such as cadmium and mercury.

DOI: 10.1103/physreva.84.030702

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Production of ultracold Cs*Yb molecules by photoassociation

Alexander Guttridge, S. A. Hopkins, Matthew D. Frye +3 more

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Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

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Yun Long, Zhuan-Xian Xiong, Xi Zhang +3 more

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Observation of hyperfine interaction in photoassociation spectra of ultracold RbYb

Cristian Bruni, Axel Görlitz

Physical Review AAug 3, 201615 citations

Physical Review A

Photoassociative production of ultracold heteronuclear ytterbium molecules

Mateusz Borkowski, R. Ciuryło, Paul S. Julienne, Rekishu Yamazaki, Hideaki Hara, Katsunari Enomoto, Shintaro Taie, Seiji Sugawa, Yosuke Takasu, Yoshiro Takahashi

Published Sep 14, 2011• 17 citations

Publisher

Abstract

{}^{170}

{}^{174}

Yb and

{}^{174}

{}^{176}

Yb molecules. We develop a single-channel mass-scaled interaction model for the excited state molecule which well reproduces the measured bound state energies. This is an important step toward optical control of interactions in mixtures of ultracold ytterbium gases using heteronuclear optical Feshbach resonances. The model developed is applicable in collisions of other similar systems, such as cadmium and mercury.

DOI: 10.1103/physreva.84.030702

Related papers

Production of ultracold Cs*Yb molecules by photoassociation

Alexander Guttridge, S. A. Hopkins, Matthew D. Frye +3 more

We report the production of ultracold heteronuclear ${\mathrm{Cs}}^{*}\mathrm{Yb}$ molecules through one-photon photoassociation applied to an ultracold atomic mixture of Cs and Yb confined in an optical dipole trap. We use trap-loss spectroscopy to detect molecular states below the $\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}(^{2}P_{1/2})+\mathrm{Yb}(^{1}S_{0})$ asymptote. For $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{174}\mathrm{Yb}$ , we observe 13 rovibrational states with binding energies up to $\ensuremath{\sim}500\phantom{\rule{0.28em}{0ex}}\mathrm{GHz}$. For each rovibrational state we observe two resonances associated with the Cs hyperfine structure and show that the hyperfine splitting in the diatomic molecule decreases for more deeply bound states. In addition, we produce ultracold fermionic $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{173}\mathrm{Yb}$ and bosonic $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{172}\mathrm{Yb}$ and $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{170}\mathrm{Yb}$ molecules. From mass scaling, we determine the number of vibrational levels supported by the 2(1/2) excited-state potential to be 154 or 155.We report the production of ultracold heteronuclear ${\mathrm{Cs}}^{*}\mathrm{Yb}$ molecules through one-photon photoassociation applied to an ultracold atomic mixture of Cs and Yb confined in an optical dipole trap. We use trap-loss spectroscopy to detect molecular states below the $\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}(^{2}P_{1/2})+\mathrm{Yb}(^{1}S_{0})$ asymptote. For $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{174}\mathrm{Yb}$, we observe 13 rovibrational states with binding energies up to $\ensuremath{\sim}500\phantom{\rule{0.28em}{0ex}}\mathrm{GHz}$. For each rovibrational state we observe two resonances associated with the Cs hyperfine structure and show that the hyperfine splitting in the diatomic molecule decreases for more deeply bound states. In addition, we produce ultracold fermionic $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{173}\mathrm{Yb}$ and bosonic $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{172}\mathrm{Yb}$ and $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{170}\mathrm{Yb}$ molecules. From mass scaling, we determine the number of vibrational levels supported by the 2(1/2) excited-state potential to be 154 or 155.

arXiv:1804.07319Physical Review AJun 19, 201831 citations

Photoassociative production of ultracold heteronuclear YbLi* molecules

Richard Roy, Rajendra K. Shrestha, Alaina Green +5 more

We report on the production of ultracold heteronuclear YbLi* molecules in a dual-species magneto-optical trap by photoassociation (PA). The formation of the electronically excited molecules close to dissociation was observed by trap loss spectroscopy. We find 4 rovibrational states within a range of $250\phantom{\rule{0.16em}{0ex}}\mathrm{GHz}$ below the $\mathrm{Yb}(^{1}S_{0})+\mathrm{Li}(^{2}P_{1/2})$ asymptote and observe isotopic PA line shifts in mixtures of $^{6}\mathrm{Li}$ with $^{174}\mathrm{Yb}$ , $^{172}\mathrm{Yb}$ , and $^{176}\mathrm{Yb}$ . We also describe our theoretical ab initio calculation for the relevant electronic potentials and utilize it to analyze and identify the lines in the experimentally observed spectrum.We report on the production of ultracold heteronuclear YbLi* molecules in a dual-species magneto-optical trap by photoassociation (PA). The formation of the electronically excited molecules close to dissociation was observed by trap loss spectroscopy. We find 4 rovibrational states within a range of $250\phantom{\rule{0.16em}{0ex}}\mathrm{GHz}$ below the $\mathrm{Yb}(^{1}S_{0})+\mathrm{Li}(^{2}P_{1/2})$ asymptote and observe isotopic PA line shifts in mixtures of $^{6}\mathrm{Li}$ with $^{174}\mathrm{Yb}$, $^{172}\mathrm{Yb}$, and $^{176}\mathrm{Yb}$. We also describe our theoretical ab initio calculation for the relevant electronic potentials and utilize it to analyze and identify the lines in the experimentally observed spectrum.

arXiv:1606.03120Physical Review ASep 14, 201632 citations

Line shapes of optical Feshbach resonances near the intercombination transition of bosonic ytterbium

Mateusz Borkowski, R. Ciuryło, Paul S. Julienne +3 more

The properties of bosonic ytterbium photoassociation spectra near the intercombination transition ${^{1}S}_{0}\ensuremath{-}{^{3}P}_{1}$ are studied theoretically at ultralow temperatures. We demonstrate how the shapes and intensities of rotational components of optical Feshbach resonances are affected by mass tuning of the scattering properties of the two colliding ground-state atoms. Particular attention is given to the relationship between the magnitude of the scattering length and the occurrence of shape resonances in higher partial waves of the van der Waals system. We develop a mass-scaled model of the excited-state potential that represents the experimental data for different isotopes. The shape of the rotational photoassociation spectrum for various bosonic Yb isotopes can be qualitatively different.The properties of bosonic ytterbium photoassociation spectra near the intercombination transition ${^{1}S}_{0}\ensuremath{-}{^{3}P}_{1}$ are studied theoretically at ultralow temperatures. We demonstrate how the shapes and intensities of rotational components of optical Feshbach resonances are affected by mass tuning of the scattering properties of the two colliding ground-state atoms. Particular attention is given to the relationship between the magnitude of the scattering length and the occurrence of shape resonances in higher partial waves of the van der Waals system. We develop a mass-scaled model of the excited-state potential that represents the experimental data for different isotopes. The shape of the rotational photoassociation spectrum for various bosonic Yb isotopes can be qualitatively different.

arXiv:0905.0958Physical Review AJul 29, 200938 citations

Production of heteronuclear molecules in an electronically excited state by photoassociation in a mixture of ultracold Yb and Rb

Nils Nemitz, F. Baumer, Frank Münchow +2 more

We have produced ultracold heteronuclear ${\text{YbRb}}^{\ensuremath{\ast}}$ molecules in a combined magneto-optical trap by photoassociation. The formation of electronically excited molecules close to the dissociation limit was observed by the trap loss spectroscopy in mixtures of $^{87}\text{R}\text{b}$ with $^{174}\text{Y}\text{b}$ and $^{176}\text{Y}\text{b}$ . The molecules could be prepared in well-defined rovibrational levels, allowing for an experimental determination of the long-range potential in the electronically excited state.We have produced ultracold heteronuclear ${\text{YbRb}}^{\ensuremath{\ast}}$ molecules in a combined magneto-optical trap by photoassociation. The formation of electronically excited molecules close to the dissociation limit was observed by the trap loss spectroscopy in mixtures of $^{87}\text{R}\text{b}$ with $^{174}\text{Y}\text{b}$ and $^{176}\text{Y}\text{b}$. The molecules could be prepared in well-defined rovibrational levels, allowing for an experimental determination of the long-range potential in the electronically excited state.

arXiv:0807.0852Physical Review AJun 4, 200995 citations

Observation of Photoassociation Spectra of Ultracold 174 Yb Atoms at 1 S 0 — 3 P 1 Inter-Combination Line

Yun Long, Zhuan-Xian Xiong, Xi Zhang +3 more

Photoassociation (PA) of cold atoms is a key tool widely used for accurate determination of long-range molecular potentials, measurement and tuning of interatomic interactions, as well as creation of desired cold molecules. We report the observation of PA spectra of ultracold ytterbium (Yb) atoms at the 1 S 0 — 3 P 1 inter-combination line by detecting the resonant loss of atoms trapped in a crossed far-off-resonance trap (crossed-FORT). Eight vibrational levels in the 1 0 + u molecular state are observed for PA laser detunings up to 1 GHz with respect to the atomic resonance. The photoassociation resonances have a Lorentzian shape and sub-MHz linewidths due to the ultra low temperature of the atoms, and the resonance positions agree well with that predicted by the semiclassical formula.Photoassociation (PA) of cold atoms is a key tool widely used for accurate determination of long-range molecular potentials, measurement and tuning of interatomic interactions, as well as creation of desired cold molecules. We report the observation of PA spectra of ultracold ytterbium (Yb) atoms at the 1 S 0 — 3 P 1 inter-combination line by detecting the resonant loss of atoms trapped in a crossed far-off-resonance trap (crossed-FORT). Eight vibrational levels in the 1 0 + u molecular state are observed for PA laser detunings up to 1 GHz with respect to the atomic resonance. The photoassociation resonances have a Lorentzian shape and sub-MHz linewidths due to the ultra low temperature of the atoms, and the resonance positions agree well with that predicted by the semiclassical formula.

Chinese Physics LettersJul 1, 20134 citations

Observation of hyperfine interaction in photoassociation spectra of ultracold RbYb

Cristian Bruni, Axel Görlitz

We report on the creation of ultracold heteronuclear and electronically excited Rb*Yb molecules in a hybrid conservative trap by photoassociation of ultracold $^{87}\mathrm{Rb}$ and $^{176}\mathrm{Yb}$ . The molecules are formed below the ${\mathrm{Rb}}_{5\mathit{p}1}(^{2}P_{1/2})+{\mathrm{Yb}}_{6\mathit{s}2}(^{1}S_{0})$ dissociation limit and the resonances are detected using trap-loss spectroscopy. By addressing vibrational levels with binding energies down to ${E}_{B}=\ensuremath{-}h\ifmmode\times\else\texttimes\fi{}2.2\phantom{\rule{0.16em}{0ex}}\mathrm{THz}$, we study the change in hyperfine coupling of the diatomic molecule as a function of internuclear separation. We observe a decreasing hyperfine splitting for more tightly bound excited molecular states where the hyperfine splitting is reduced by more than $30%$ compared to the atomic value for $^{87}\mathrm{Rb}$ .We report on the creation of ultracold heteronuclear and electronically excited Rb*Yb molecules in a hybrid conservative trap by photoassociation of ultracold $^{87}\mathrm{Rb}$ and $^{176}\mathrm{Yb}$. The molecules are formed below the ${\mathrm{Rb}}_{5\mathit{p}1}(^{2}P_{1/2})+{\mathrm{Yb}}_{6\mathit{s}2}(^{1}S_{0})$ dissociation limit and the resonances are detected using trap-loss spectroscopy. By addressing vibrational levels with binding energies down to ${E}_{B}=\ensuremath{-}h\ifmmode\times\else\texttimes\fi{}2.2\phantom{\rule{0.16em}{0ex}}\mathrm{THz}$, we study the change in hyperfine coupling of the diatomic molecule as a function of internuclear separation. We observe a decreasing hyperfine splitting for more tightly bound excited molecular states where the hyperfine splitting is reduced by more than $30%$ compared to the atomic value for $^{87}\mathrm{Rb}$.

Physical Review AAug 3, 201615 citations

{}^{170}

{}^{174}

Yb and

{}^{174}

{}^{176}

We report the production of ultracold heteronuclear

{\mathrm{Cs}}^{*}\mathrm{Yb}

molecules through one-photon photoassociation applied to an ultracold atomic mixture of Cs and Yb confined in an optical dipole trap. We use trap-loss spectroscopy to detect molecular states below the

\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}(^{2}P_{1/2})+\mathrm{Yb}(^{1}S_{0})

asymptote. For

^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{174}\mathrm{Yb}

, we observe 13 rovibrational states with binding energies up to $\ensuremath{\sim}500\phantom{\rule{0.28em}{0ex}}\mathrm{GHz}$. For each rovibrational state we observe two resonances associated with the Cs hyperfine structure and show that the hyperfine splitting in the diatomic molecule decreases for more deeply bound states. In addition, we produce ultracold fermionic

^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{173}\mathrm{Yb}

and bosonic

^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{172}\mathrm{Yb}

and

^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{170}\mathrm{Yb}

molecules. From mass scaling, we determine the number of vibrational levels supported by the 2(1/2) excited-state potential to be 154 or 155.

250\phantom{\rule{0.16em}{0ex}}\mathrm{GHz}

below the

\mathrm{Yb}(^{1}S_{0})+\mathrm{Li}(^{2}P_{1/2})

asymptote and observe isotopic PA line shifts in mixtures of

^{6}\mathrm{Li}

with

^{174}\mathrm{Yb}

^{172}\mathrm{Yb}

, and

^{176}\mathrm{Yb}

. We also describe our theoretical ab initio calculation for the relevant electronic potentials and utilize it to analyze and identify the lines in the experimentally observed spectrum.

^{87}\text{R}\text{b}

with

^{174}\text{Y}\text{b}

and

^{176}\text{Y}\text{b}

. The molecules could be prepared in well-defined rovibrational levels, allowing for an experimental determination of the long-range potential in the electronically excited state.

We report on the creation of ultracold heteronuclear and electronically excited Rb*Yb molecules in a hybrid conservative trap by photoassociation of ultracold

^{87}\mathrm{Rb}

and

^{176}\mathrm{Yb}

. The molecules are formed below the

{\mathrm{Rb}}_{5\mathit{p}1}(^{2}P_{1/2})+{\mathrm{Yb}}_{6\mathit{s}2}(^{1}S_{0})

dissociation limit and the resonances are detected using trap-loss spectroscopy. By addressing vibrational levels with binding energies down to ${E}_{B}=\ensuremath{-}h\ifmmode\times\else\texttimes\fi{}2.2\phantom{\rule{0.16em}{0ex}}\mathrm{THz}$, we study the change in hyperfine coupling of the diatomic molecule as a function of internuclear separation. We observe a decreasing hyperfine splitting for more tightly bound excited molecular states where the hyperfine splitting is reduced by more than

30%

compared to the atomic value for

^{87}\mathrm{Rb}