Combined single/dual fiber optical trapping for flexible particle manipulation

The Structure and Applications of Fused Tapered Fiber Optic Sensing: A Review

“…Directional control of bacterial cells was achieved by adjusting the power in the fiber probe to direct cells in different directions. Gao et al [27] achieved both single-fiber gradient By altering the arrangement and combination of fibers within the optical tweezer, the functionality of the optical tweezer can be modified. Huang et al [73] achieved optical trapping and manipulation of Escherichia coli cells using a tapered fiber with a dual-fiber arrangement, forming a high-energy density crossing point and utilizing gradient forces.…”

“…Directional control of bacterial cells was achieved by adjusting the power in the fiber probe to direct cells in different directions. Gao et al [27] achieved both single-fiber gradient mode and dual-fiber scattering mode trapping configurations in a single optical tweezer setup based on a tapered optical fiber, as shown in Figure 11. This configuration enables the trapping and manipulation of at least three particles simultaneously, each of which can be utilized for in-situ experimental activities and analyses, holding significant implications for super-resolution imaging based on microsphere-assisted techniques.…”

“…Photonic Crystal Fiber (PCF), with its controllable microstructure arrangement, regulates the motion of photons, providing multifunctionality and stable performance in sensing applications, applicable to the detection of gases, liquids, and other media [25,26]. Optical tweezers capture microparticles by adjusting laser power, featuring advantages such as low cost and high efficiency, and are widely used in particle manipulation and levitation on a microscopic scale [27,28]. The Mach-Zehnder Interferometer (MZI) achieves high sensitivity sensing by measuring relative phase changes, suitable for measuring optical path differences [29,30].…”

Photonic Hook Initiated Using an Air–Liquid Interface

“…This quality has not been discovered in photonic hooks before and is reported in this paper for the first time. Before transverse optical trapping was realised using laser tweezers equipped with engineered fibre tips to produce a local photonic jet [27,28], normally, a more sophisticated system needed to be added to trap nano-objects [29][30][31]. Equally, Yu et al used a light field with a nonuniform spatial deformation to create multiple focal points for realising trapping in the longitudinal direction [32].…”