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Complex-valued three-dimensional atomic spectroscopy with Gaussian-assisted inline holography
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DOI：10.1103/PhysRevResearch.7.013054.png)
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摘要
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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 address key challenges in digital holography. In this paper, we develop a Gaussian-decomposition-assisted approach to inline holography for single-shot, simultaneous measurements of absorption and phase-shift profiles of small atomic samples sparsely distributed in three dimensions. The samples' axial positions are resolved with micrometer resolution and their spectroscopy are extracted from complex-valued images recorded at various probe frequencies. The phase-angle readout is not only robust against transition saturation but also insensitive to atom-number and optical-pumping-induced interaction-strength fluctuations. Benefiting from such features, we achieve hundred-kHz-level single-shot resolution to the transition frequency of a 87Rb D2 line, with merely hundreds of atoms. We further demonstrate single-shot three-dimensional field sensing by measuring local light shifts to the atomic array with micrometer spatial resolution.
Keyword:
WIDE-FIELD
DIGITAL HOLOGRAPHY
PHASE RETRIEVAL
SINGLE ATOMS
ENHANCEMENT
SIMULATIONS
PROPAGATION
ABERRATIONS
MICROSCOPE
ALGORITHMS
期刊
IF:
4.2
论文数:
7.6K
被引数:
2.7W
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