We report direct laser cooling of a symmetric top molecule, reducing the transverse temperature beam calcium monomethoxide (CaOCH$_3$) to $1.8\pm0.7$ mK while addressing two distinct nuclear spin isomers. These results open path efficient production ultracold chiral molecules and conclusively demonstrate that by using proper rovibronic optical transitions, both photon cycling complex can be as for much simpler linear species.

We demonstrate a 1D magneto-optical trap of the polar free radical calcium monohydroxide (CaOH). A quasiclosed cycling transition is established to scatter ∼103 photons per molecule, predominantly limited by interaction time. This enables radiative laser cooling CaOH while compressing molecular beam, leading significant increase in on axis beam brightness and reduction temperature from 8.4 1.4 mK.Received 29 January 2020Accepted 9 March 2020DOI:https://doi.org/10.1103/PhysRevLett.124.133201©...

Ultracold polyatomic molecules are promising candidates for experiments in quantum science and precision searches physics beyond the Standard Model. A key requirement is ability to achieve full control over internal structure of molecules. In this work, we established coherent individual states calcium monohydroxide (CaOH) demonstrated a method searching electron electric dipole moment (eEDM). Optically trapped, ultracold CaOH were prepared single state, polarized an field, coherently...

We report optical trapping of a polyatomic molecule, calcium monohydroxide (CaOH). CaOH molecules from magneto-optical trap are sub-Doppler laser cooled to 20(3) μK in free space and loaded into an dipole trap. attain in-trap molecule number density 3(1)×10^{9} cm^{-3} at temperature 57(8) μK. Trapped optically pumped excited vibrational bending mode, whose ℓ-type parity doublet structure is potential resource for wide range proposed quantum science applications with molecules. measure the...

We report a generally applicable computational and experimental approach to determine vibronic branching ratios in linear polyatomic molecules the 10−5 level, including for nominally symmetry-forbidden transitions. These methods are demonstrated CaOH YbOH, showing approximately two orders of magnitude improved sensitivity compared with previous state art. Knowledge at this level is needed successful deep laser cooling broad range molecular species.

We study optical cycling in the polar free radical calcium monohydroxide (CaOH) and establish an experimental path towards scattering $\ensuremath{\sim}{10}^{4}$ photons. report rovibronic branching ratio measurements with precision at $\ensuremath{\sim}{10}^{\ensuremath{-}4}$ level observe weak symmetry-forbidden decays to bending modes nonzero vibrational angular momentum. Calculations are excellent agreement these predict additional decay pathways. Additionally, we perform high-resolution...

We study the internal state dynamics of optically trapped polyatomic molecules subject to room-temperature blackbody radiation. Using rate equations that account for radiative decay and excitation between rovibrational levels electronic ground state, we model microscopic behavior molecules' thermalization with their environment. As an application model, describe in detail procedure used determine lifetimes low-lying vibrational states ultracold CaOH molecules, values which were reported...

Ultracold polyatomic molecules are promising candidates for experiments in quantum science, sensing, ultracold chemistry, and precision measurements of physics beyond the Standard Model. A key, yet unrealized, requirement these is ability to achieve full control over complex internal structure molecules. Here, we establish coherent individual states a molecule, calcium monohydroxide (CaOH), use techniques demonstrate method searching electron electric dipole moment (eEDM). Optically trapped,...

We report measurements of the scalar and tensor static polarizabilities $^{115}\mathrm{In}\phantom{\rule{4pt}{0ex}}7{p}_{1/2}$ $7{p}_{3/2}$ excited states using two-step diode laser spectroscopy in an atomic beam. These are one to two orders magnitude larger than for lower-lying indium due close proximity $7p$ $6d$ states. For polarizabilities, we find values (in units) $1.811(4)\ifmmode\times\else\texttimes\fi{}{10}^{5}\phantom{\rule{4pt}{0ex}}{a}_{0}^{3}$...

Over the past decade, tremendous progress has been made to extend tools of laser cooling and trapping molecules. Those same have recently applied polyatomic molecules (molecules containing three or more atoms). In this review, we discuss scientific drive bring larger ultralow temperatures, features molecular structure that provide most promising for pursuit, some technical aspects how lasers can be used control motion quantum states We also present opportunities challenges use science technology.

We report magneto-optical trapping (MOT) of a polyatomic molecule, calcium monohydroxide (CaOH). The MOT contains $2.0(5)\times 10^4$ CaOH molecules at peak density $3.0(8)\times10^{6}$ cm$^{-3}$. are further sub-Doppler laser cooled in an optical molasses, to temperature 110(4) $\mu$K. temperatures and densities achieved here make viable candidate for wide variety quantum science applications, including the creation tweezer arrays molecules. This work also suggests that cooling many other...

We demonstrate a blue-detuned magneto-optical trap (MOT) of polyatomic molecule, calcium monohydroxide (CaOH). identify novel MOT frequency configuration that produces high spatial compression the molecular cloud. This achieves cloud radius $59(5)~\mu\text{m}$ and peak density $8(2) \times 10^8~\text{cm}^{-3}$, highest reported for to date. compare our experimental studies MOTs CaOH with Monte-Carlo simulations, finding good agreement.

We report magneto-optical trapping (MOT) of a polyatomic molecule, calcium monohydroxide (CaOH).The MOT contains 2.0(5) × 10 4 CaOH molecules at peak density 3.0(8) 6 cm -3 .CaOH are further sub-Doppler laser cooled in an optical molasses, to temperature 110(4) µK.The temperatures and densities achieved here make viable candidate for wide variety quantum science applications, including the creation tweezer arrays molecules.This work also suggests that cooling many other species [1-3] will be...

We report optical trapping of a polyatomic molecule, calcium monohydroxide (CaOH). CaOH molecules from magneto-optical trap are sub-Doppler laser cooled to $20(3)~μ\text{K}$ in free space and loaded into an dipole trap. attain in-trap molecule number density $3(1) \times 10^9~\text{cm}^{-3}$ at temperature $57(8)~μ$K. Trapped optically pumped excited vibrational bending mode, whose $\ell$-type parity doublet structure is potential resource for wide range proposed quantum science applications...

We present a robust, continuous molecular decelerator that employs high magnetic fields and few optical pumping steps. CaOH molecules are slowed, accumulating at low velocities in range sufficient for loading both magneto-optical traps. During the slowing, scatter only seven photons, removing around 8 K of energy. Because large energies can be removed with spontaneous radiative decays, this method principle applied to nearly any paramagnetic atomic or species, opening general path trapping...

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We study the internal state dynamics of optically trapped polyatomic molecules subject to room temperature blackbody radiation. Using rate equations that account for radiative decay and excitation between rovibrational levels electronic ground state, we model microscopic behavior molecules' thermalization with their environment. As an application model, describe in detail procedure used determine lifetimes low-lying vibrational states ultracold CaOH molecules, values which were reported...

Polyatomic molecules have rich structural features that make them uniquely suited to applications in quantum information science, simulation, ultracold chemistry, and searches for physics beyond the Standard Model. However, a key challenge is fully controlling both internal state motional degrees of freedom molecules. Here, we demonstrate creation an optical tweezer array individual polyatomic molecules, CaOH, with control their state. The complex structure CaOH results non-trivial...