Complex-valued 3D atomic spectroscopy with Gaussian-assisted inline holography
- URL: http://arxiv.org/abs/2405.09117v2
- Date: Thu, 23 May 2024 04:30:22 GMT
- Title: Complex-valued 3D atomic spectroscopy with Gaussian-assisted inline holography
- Authors: Xing Huang, Yuzhuo Wang, Jian Zhao, Saijun Wu,
- Abstract summary: We develop and experimentally demonstrate a Gaussian-decomposition-assisted approach to inline holography, for single-shot, simultaneous measurements of absorption and phase shift of small atomic samples distributed in 3D.
With the phase-angle readouts that are highly insensitive to atom-number and interaction-strength uncertainties, we achieve hundred-kHz-level single-shot-resolution to the transition frequency with merely hundreds of atoms.
- Score: 5.608499944121466
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: When a laser-cooled atomic sample is optically excited, the envelope of coherent forward scattering can often be decomposed into a few complex Gaussian profiles. The convenience of Gaussian propagation helps addressing key challenges in digital holography. In this work, we theoretically develop and experimentally demonstrate a Gaussian-decomposition-assisted approach to inline holography, for single-shot, simultaneous measurements of absorption and phase shift of small atomic samples sparsely distributed in 3D. Experimentally, we image a sparse lattice of $^{87}$Rb samples on the D2 line, to resolve their axial positions with micrometer precision, and to retrieve their complex-valued spectroscopic images. With the phase-angle readouts that are highly insensitive to atom-number and interaction-strength uncertainties, we achieve hundred-kHz-level single-shot-resolution to the transition frequency with merely hundreds of atoms. We further demonstrate 3D sensing of local light shift with micrometer spatial resolution.
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