Journal
NANO LETTERS
Volume 15, Issue 8, Pages 5647-5652Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b02491
Keywords
Biological lasers; intracellular lasing Whispering Gallery Mode resonator; cell tracking and tagging opsonized beads; multiplexing
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Funding
- European Union [PCIG12-GA-2012-334407]
- Scottish Funding Council (SUPA II)
- German Science Foundation (DFG) [SCHU 3003/1-1]
- Engineering and Physical Sciences Research Council [1507126, 1373433] Funding Source: researchfish
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We report on a laser that is fully embedded within a single live cell. By harnessing natural endocytosis of the cell, we introduce a fluorescent whispering gallery mode (WGM) microresonator into the cell cytoplasm. On pumping with nanojoule light pulses, green laser emission is generated inside the cells. Our approach can be applied to different cell types, and cells with microresonators remain viable for weeks under standard conditions. The characteristics of the lasing spectrum provide each cell with a barcode-type label which enables uniquely identifying and tracking individual migrating cells. Self-sustained lasing from cells paves the way to new forms of cell tracking, intracellular sensing, and adaptive imaging.
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