Fig. 1. Schematic diagram of fiber splicing. (a) Coaxial splicing of 980 nm SMF and 1550 nm SMF; (b) splicing of 980 nm SMF and 1550 nm SMF with 2 μm transverse core offset

Fig. 2. Fiber splicing offset curve

Fig. 3. Image of stretched fiber tip under optical microscope

Fig. 4. Light field distributions of different mode beams. (a) LP₀₁ mode; (b) LP₁₁ mode; (c) LP₀₁ and LP₁₁ modes

Fig. 5. Simulation results of capture force acting on Chlorella cells when two modes coexist (outgoing direction of fiber is +x axis). (a) Axial force acting on Chlorella cells along x-axis; (b) transeverse force acting on Chlorella cells at x=47.70 μm; (c) axial force acting on Chlorella cells along y=-1.8 μm; (d) transeverse force acting on Chlorella cells at x=44.48 μm

Fig. 6. Diagram of experimental setup

Fig. 7. Capture of multibiotic cells (Chlorella cells) in different directions under coexisting beams of LP₀₁ and LP₁₁ modes. (a) Chlorella cells captured along path 1; (b) Chlorella cells attracted to both sides of fiber tip (path 2 and path 3)

Fig. 8. Experimental diagram of movement process of Chlorella cells with optical fiber

Fig. 9. Plots of displacement varying with time for motion of Chlorella cells with fiber. (a) Chlorella cells moving to right with fiber; (b) Chlorella cells moving up and down with fiber; (c) Chlorella cells moving to left with fiber