A Light-Field Metasurface for High-Resolution Single-Particle Tracking.
basic_science · Level V
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- Record sourced from PubMed, PMID 30897902.
- Also identified by DOI 10.1021/acs.nanolett.8b04673.
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Abstract
Three-dimensional (3D) single-particle tracking (SPT) is a key tool for studying dynamic processes in the life sciences. However, conventional optical elements utilizing light fields impose an inherent trade-off between lateral and axial resolution, preventing SPT with high spatiotemporal resolution across an extended volume. We overcome the typical loss in spatial resolution that accompanies light-field-based approaches to obtain 3D information by placing a standard microscope coverslip patterned with a multifunctional, light-field metasurface on a specimen. This approach enables an otherwise unmodified microscope to gather 3D information at an enhanced spatial resolution. We demonstrate simultaneous tracking of multiple fluorescent particles within a large 0.5 × 0.5 × 0.3 mm<sup>3</sup> volume using a standard epi-fluorescent microscope with submicron lateral and micron-level axial resolution.