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Optical two-dimensional coherent spectroscopy of cold atoms

https://doi.org/10.1364/OL.478793

Liang, Danfu; Savio_Rodriguez, Lexter; Zhou, Haitao; Zhu, Yifu; Li, Hebin (December 2022, Optics Letters)

We report an experimental demonstration of optical two-dimensional coherent spectroscopy (2DCS) in cold atoms. The experiment integrates a collinear 2DCS setup with a magneto-optical trap (MOT), in which cold rubidium (Rb) atoms are prepared at a temperature of approximately 200 µK and a number density of 10¹⁰cm⁻³. With a sequence of femtosecond laser pulses, we first obtain one-dimensional second- and fourth-order nonlinear signals and then acquire both one-quantum and zero-quantum 2D spectra of cold Rb atoms. The capability of performing optical 2DCS in cold atoms is an important step toward optical 2DCS study of many-body physics in cold atoms and ultimately in atom arrays and trapped ions. Optical 2DCS in cold atoms/molecules can also be a new avenue to probe chemical reaction dynamics in cold molecules.
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Broadband optical two-dimensional coherent spectroscopy of a rubidium atomic vapor

https://doi.org/10.1103/PhysRevA.105.052810

Yan, Jieli; Revesz, Stephen; Liang, Danfu; Li, Hebin (May 2022, Physical Review A)

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Collective Resonance of $D$ States in Rubidium Atoms Probed by Optical Two-Dimensional Coherent Spectroscopy

https://doi.org/10.1103/PhysRevLett.128.103601

Liang, Danfu; Zhu, Yifu; Li, Hebin (March 2022, Physical Review Letters)

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Quantum Dynamics of Attractive and Repulsive Polarons in a Doped ${MoSe}_{2}$ Monolayer

https://doi.org/10.1103/PhysRevX.13.011029

Huang, Di; Sampson, Kevin; Ni, Yue; Liu, Zhida; Liang, Danfu; Watanabe, Kenji; Taniguchi, Takashi; Li, Hebin; Martin, Eric; Levinsen, Jesper; et al (March 2023, Physical Review X)

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Optical two-dimensional coherent spectroscopy of many-body dipole–dipole interactions and correlations in atomic vapors

https://doi.org/10.1063/5.0052982

Liang, Danfu; Li, Hebin (June 2021, The Journal of Chemical Physics)