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Superradiant and subradiant states in lifetime-limited organic molecules through laser-induced tuning

https://doi.org/10.1038/s41567-024-02404-4

Lange, Christian M; Daggett, Emma; Walther, Valentin; Huang, Libai; Hood, Jonathan D (May 2024, Nature Physics)

An array of radiatively coupled emitters provides a platform for generating, storing and manipulating quantum light. However, the simultaneous positioning and tuning of several lifetime-limited emitters into resonance remains a challenge. Here we report the creation of superradiant and subradiant entangled states in pairs of lifetime-limited and subwavelength-spaced organic molecules by permanently shifting them into resonance with laser-induced tuning. The molecules are embedded as defects in an organic nanocrystal. The pump light redistributes charges in the nanocrystal and dramatically increases the likelihood of resonant molecules. The frequency spectra, lifetimes and second-order correlation functions agree with a simple quantum model. This scalable tuning approach with organic molecules provides a pathway for observing collective quantum phenomena in subwavelength arrays of quantum emitters.
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Imaging a Li6 Atom in an Optical Tweezer 2000 Times with Λ-Enhanced Gray Molasses

https://doi.org/10.1103/PhysRevLett.131.083001

Blodgett, Karl N; Peana, David; Phatak, Saumitra S; Terry, Lane M; Montes, Maria Paula; Hood, Jonathan D (August 2023, Physical Review Letters)

We have imaged lithium-6 thousands of times in an optical tweezer using Λ-enhanced gray molasses cooling light. Despite being the lightest alkali metal, with a recoil temperature of 3.5 μK, we achieve an imaging survival of 0.999 50(2), which sets the new benchmark for low-loss imaging of neutral atoms in optical tweezers. Lithium is loaded directly from a magneto-optical trap into a tweezer with an enhanced loading rate of 0.7. We cool the atom to 70 μK and present a new cooling model that accurately predicts steady-state temperature and scattering rate in the tweezer. These results pave the way for ground state preparation of lithium en route to the assembly of the LiCs molecule in its ground state.
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High resolution photoassociation spectroscopy of the excited $c^{3} Σ_{1}^{+}$ potential of ${}^{23}{Na} {}^{133}{Cs}$

https://doi.org/10.1103/PhysRevResearch.5.023149

Picard, Lewis R.; Zhang, Jessie T.; Cairncross, William B.; Wang, Kenneth; Patenotte, Gabriel E.; Park, Annie J.; Yu, Yichao; Liu, Lee R.; Hood, Jonathan D.; González-Férez, Rosario; et al (June 2023, Physical Review Research)

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Coherent Optical Creation of a Single Molecule

https://doi.org/10.1103/PhysRevX.11.031061

Yu, Yichao; Wang, Kenneth; Hood, Jonathan D.; Picard, Lewis R. B.; Zhang, Jessie T.; Cairncross, William B.; Hutson, Jeremy M.; Gonzalez-Ferez, Rosario; Rosenband, Till; Ni, Kang-Kuen (September 2021, Physical Review X)
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Forming a single molecule by magnetoassociation in an optical tweezer

Zhang, Jessie T.; Yu, Yichao; Cairncross, William B.; Wang, Kenneth; Picard, Lewis R.B.; Hood, Jonathan D.; Lin, Yen-Wei; Hutson, Jeremy M.; Ni, Kang-Kuen (January 2020, ArXivorg)

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