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Polyatomic molecules have rich structural features that make them uniquelysuited to applications in quantum information science, quantum simulation,ultracold chemistry, and searches for physics beyond the Standard Model.However, a key challenge is fully controlling both the internal quantum stateand the motional degrees of freedom of the molecules. Here, we demonstrate thecreation of an optical tweezer array of individual polyatomic molecules, CaOH,with quantum control of their internal quantum state. The complex quantumstructure of CaOH results in a non-trivial dependence of the molecules'behavior on the tweezer light wavelength. We control this interaction anddirectly and nondestructively image individual molecules in the tweezer arraywith >90% fidelity. The molecules are manipulated at the single internalquantum state level, thus demonstrating coherent state control in a tweezerarray. The platform demonstrated here will enable a variety of experimentsusing individual polyatomic molecules with arbitrary spatial arrangement.

An optical tweezer array of ultracold polyatomic molecules