Rotational analysis of the transition of SrNH2

Sheridan, P. M.; Dick, Michael; Wang, J.-G.; Bernath, Peter F.

doi:10.1016/j.jms.2005.07.011

Cited by 7 publications

(3 citation statements)

References 23 publications

(42 reference statements)

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“…For species without reflection symmetry, population will be cooled into the lowest K a = 0 state, with a smaller amount of population in K a = 1. On the other hand, molecules with C 2v symmetry (e.g., MNH 2 ) will cool into both the K a = 0 or K a = 1 levels due to nuclear spin statistics as previously observed in supersonic beams [50]. Because populating the K a = 1 level is often useful for photon cycling, we emphasize that it is straightforward to populate this level for any of the species discussed here using microwaves, optical pumping, or natural population.…”

Section: Experimental Outlook a Molecule Productionmentioning

confidence: 65%

“…Such species include (see Fig. 2): AE monoamides (MNH 2 ) [46][47][48][49][50][51][52][53], hydrosulfides (MSH) [54][55][56][57][58], monoethoxides (MOC 2 H 5 ) [59], pyrollyls (MC 4 H 4 N) [60], methylpentadienyls (MC 5 H 4 CH 3 ) [60-62], methanethiols (MSCH 3 ) [63], alkylamides (MNHCH 3 ) [64], and isopropoxides (MOCH(CH 3 ) 2 ) [65], where M = Mg, Ca, Sr, or Ba. 4 Chiral-substituted AE-methyls (MCHDT) [66][67][68] and AE-methoxides (MOCHDT) [69] are also considered because the chiral methyl group will cause the three moments of inertia to differ.…”

Section: Achieving Photon Cyclingmentioning

confidence: 99%

“…Because decay to the NH2 bending mode is overlapped in the C → X band, we are not able to sum experimental FCFs in this case. The molecular geometry and vibrational frequencies used in the calculations are taken from Refs [48,50,81]…”

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confidence: 99%

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Molecular Asymmetry and Optical Cycling: Laser Cooling Asymmetric Top Molecules

Augenbraun,

Doyle,

Zelevinsky

et al. 2020

Preprint

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We present a practical roadmap to achieve optical cycling and laser cooling of asymmetric top molecules (ATMs). Our theoretical analysis describes how reduced molecular symmetry, as compared to diatomic and symmetric non-linear molecules, plays a role in photon scattering. We present methods to circumvent limitations on rapid photon cycling in these systems. We calculate vibrational branching ratios for a diverse set of asymmetric top molecules and find that many species within a broad class of molecules can be effectively cooled with a manageable number of lasers. We also describe methods to achieve rotationally closed optical cycles in ATMs. Despite significant structural complexity, laser cooling can be made effective using extensions of the current techniques used for linear molecules. Potential scientific impacts of laser-cooled ATMs span frontiers in controlled chemistry, quantum simulation, and searches for physics beyond the Standard Model.

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Section: Experimental Outlook a Molecule Productionmentioning

confidence: 65%

Section: Achieving Photon Cyclingmentioning

confidence: 99%

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Molecular Asymmetry and Optical Cycling: Laser Cooling Asymmetric Top Molecules

Augenbraun,

Doyle,

Zelevinsky

et al. 2020

Preprint

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159 H2NSr Strontium monoamide

Hirota¹,

Kuchitsu²,

Steimle³

et al. 2014

Molecules Containing No Carbon Atoms and Molecules Containing One or Two Carbon Atoms

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High-Resolution Spectroscopic Investigation of the B̃²A₁−X̃²A₁Transitions of CaCH₃and SrCH₃

Wang

et al. 2005

J. Phys. Chem. A

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High-resolution spectra of the ~B(2)A(1)-- ~X(2)A(1) transitions of CaCH(3) and SrCH(3) have been recorded in a molecular jet/laser ablation source using laser excitation spectroscopy. Transitions arising from the K = 0 and 1 sub-bands have been observed for both molecules. An analysis of the data using a (2)A(1) symmetric top Hamiltonian has determined rotational and spin-rotation constants for the ~B(2)A(1) state of each molecule. From the rotational constants, structures have been estimated for both CaCH(3) and SrCH(3). The spin-rotation constant, epsilon(bc) = (epsilon(bb) + epsilon(cc))/2, in the ~B(2)A(1) state for both molecules is in reasonable agreement with the value calculated using the pure precession approximation. For CaCH(3), the K' = 1 levels of the ~B(2)A(1) state exhibit a perturbation that interchanges the energy ordering of the spin-rotation components.

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Rotational analysis of the transition of SrNH2

Cited by 7 publications

References 23 publications

Molecular Asymmetry and Optical Cycling: Laser Cooling Asymmetric Top Molecules

Molecular Asymmetry and Optical Cycling: Laser Cooling Asymmetric Top Molecules

159 H2NSr Strontium monoamide

High-Resolution Spectroscopic Investigation of the B̃²A₁−X̃²A₁Transitions of CaCH₃and SrCH₃

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Rotational analysis of the transition of SrNH2

Cited by 7 publications

References 23 publications

Molecular Asymmetry and Optical Cycling: Laser Cooling Asymmetric Top Molecules

Molecular Asymmetry and Optical Cycling: Laser Cooling Asymmetric Top Molecules

159 H2NSr Strontium monoamide

High-Resolution Spectroscopic Investigation of the B̃2A1−X̃2A1Transitions of CaCH3and SrCH3

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High-Resolution Spectroscopic Investigation of the B̃²A₁−X̃²A₁Transitions of CaCH₃and SrCH₃