Papers › Snapshot hyperspectral imaging of intracellular lasers
Snapshot hyperspectral imaging of intracellular lasers
Soraya Caixeiro, Philip Wijesinghe, Kishan Dholakia, Malte C. Gather
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Intracellular lasers are emerging as powerful biosensors for multiplexed tracking and precision sensing of cells and their microenvironment. This sensing capacity is enabled by quantifying their narrow-linewidth emission spectra, which is presently challenging to do at high speeds. In this work, we demonstrate rapid snapshot hyperspectral imaging of intracellular lasers. Using integral field mapping with a microlens array and a diffraction grating, we obtain images of the spatial and spectral intensity distribution from a single camera acquisition. We demonstrate widefield hyperspectral imaging over a 3×3 mm² field of view and volumetric imaging over 250×250×800 μm³ volumes with a spatial resolution of 5 μm and a spectral resolution of less than 0.8 nm. We evaluate the performance and outline the challenges and strengths of snapshot methods in the context of characterising the emission from intracellular lasers. This method offers new opportunities for a diverse range of applications, including high-throughput and long-term biosensing with intracellular lasers.
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