Fresnel lens optical fiber tweezers to evaluate the vitality of single algae cells

Asa Asadollahbaik; Asa Asadollahbaik; Aashutosh Kumar; Michael Heymann; Harald Giessen; Jochen Fick

doi:10.1364/OL.447683

Optics Letters
Vol. 47,
Issue 1,
pp. 170-173
(2022)
•https://doi.org/10.1364/OL.447683

Fresnel lens optical fiber tweezers to evaluate the vitality of single algae cells

Asa Asadollahbaik, Aashutosh Kumar, Michael Heymann, Harald Giessen, and Jochen Fick

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Asa Asadollahbaik, Aashutosh Kumar, Michael Heymann, Harald Giessen, and Jochen Fick, "Fresnel lens optical fiber tweezers to evaluate the vitality of single algae cells," Opt. Lett. 47, 170-173 (2022)

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Abstract

Dunaliella salina algae are trapped and studied using dual-fiber optical tweezers based on nano-imprinted Fresnel lenses. Different forms of cyclic motion of living algae inside the optical trap are observed and analyzed. A characteristic periodic motion in the 0–35 Hz frequency region reflects the algal flagella activity and is used to estimate the algal vitality, by photomovement. The trap stiffness and optical forces are measured for the case of a dead algal cell. It is shown that the dual-fiber optical tweezers can be used to study the vitality (or viability) property of single cells, a property that is essential and can be scaled up to other applications, such as sperm analysis for fertility tests.

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Supplementary Material (2)

Name	Description
Visualization 1	Video of an optically trapped alga.
Visualization 2	Video of an optically trapped alga

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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