Longitudinal optical trapping and manipulation of multiple particles via structured optical coherence

Flexible beam shaping is crucial for enhancing the versatility of optical manipulation. Structured optical coherence enables focused light beams to exhibit multiple controllable focal points along the longitudinal direction, making them ideal for longitudinal optical trapping and manipulation. By controlling the longitudinal intensity distribution, these beams can trap and manipulate multiple particles simultaneously along the same axis. This demonstrates the feasibility of using optical coherence engineering for longitudinal multi-particle trapping and manipulation, thereby expanding the control capabilities beyond traditional optical tweezers.