研究目的
Investigating the ability of large diameter fiber-optics tweezers to trap and deliver Escherichia coli (E. coli) bacteria.
研究成果
The large diameter fiber-optics tweezers successfully manipulated E. coli bacteria, with higher order modes providing a new opportunity for optical manipulation at the single-cell level. The service life of the tweezers was extended by increasing the fiber diameter.
研究不足
The study is limited by the mechanical stress and water-induced stress on the tapered FMF, which can affect the service life and performance of the tweezers.
1：Experimental Design and Method Selection:
The study involved tapering a four-mode fiber (FMF) to create tweezers for manipulating E. coli bacteria. The resonance field of extended high-order modes was utilized for manipulation.
2：Sample Selection and Data Sources:
E. coli bacteria samples were used, with initial concentrations adjusted for clear observation.
3：List of Experimental Equipment and Materials:
A tunable laser, optical microscope, CCD for recording, and tapered FMFs were used.
4：Experimental Procedures and Operational Workflow:
The FMF was tapered and placed in a solution with E. coli. Laser light was used to trap and deliver the bacteria, with observations recorded.
5：Data Analysis Methods:
The movement speed of E. coli was recorded at different laser powers and wavelengths to characterize the tweezers' performance.
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