Holographic optical tweezing leverages tightly focused laser beams to precisely manipulate objects in three-dimensional space, making it a powerful tool for fundamental physics, biological research, and cold atom trapping. By utilizing a spatial light modulator (SLM) to modulate the phase of an incident laser beam, this technique generates a 3D volume of focal points for highly controlled object manipulation.

Objects with a higher refractive index than their surrounding medium are drawn toward these focal points, enabling precise positioning of particles ranging from 10 nm to 100 μm with micron-scale accuracy. This cutting-edge approach significantly enhances applications in optical trapping, single-cell manipulation, and nanotechnology research, offering unprecedented control over micro- and nanoscale structures.

Keywords: holographic optical tweezing, optical trapping, 3D laser manipulation, spatial light modulator (SLM), cold atom trapping, biological research, fundamental physics, nanotechnology, phase modulation, precision optics.