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A Bayesian approach towards atomically-precise localization in fluorescence microscopy
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DOI：10.1038/s41467-025-64083-w.png)
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Abstract
En 中文
Super-resolution microscopy has revolutionized the imaging of complex physical and biological systems by surpassing the Abbe diffraction limit. Recent advancements, particularly in single-molecule localization microscopy, have pushed localization below nanometer precision, by applying prior knowledge of correlated fluorescence emission from single emitters. However, achieving a refinement from 1 nm to 1 Ångström demands a hundred-fold increase in collected photon signal. This quadratic resource scaling imposes a fundamental barrier in single-molecule localization microscopy, where the intense photon collection is challenged by photo-bleaching, prolonged integration times, and inherent practical constraints. Here, we break this limit by harnessing the periodic nature of the atomic lattice structure. Applying this discrete grid imaging technique (DIGIT) in a quantum emitter system, we observe an exponential collapse of localization uncertainty once surpassing the host crystal’s atomic lattice constant. We further applied DIGIT to a large-scale quantum emitter array, enabling parallel positioning of each emitter through wide-field imaging. Collectively, these advancements establish DIGIT as a competitive tool for achieving unprecedented, precise measurements, ultimately paving the way to direct optical resolution of crystal and atomic features within quantum and biological systems. The authors present DIGIT, a Bayesian imaging method that maps quantum emitters to lattice sites, achieving 0.178 Å precision and a new exponential scaling law, enabling massively parallel, sub-ångström localization in quantum and biological systems.
Keywords:
Bayesian imaging
super-resolution microscopy
single-molecule localization
atomic lattice
sub-ångström precision
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