Figure 19.2 — Aerosol optical tweezers Figure 19.2 — Aerosol optical tweezers. (a) Schematic of an experimental set-up to optically trap aerosols, including a nebuliser to produce aerosol droplets, an SLM to generate multiple optical traps and a CCD camera to track the position of the droplets. (b) A 4 × 4 array of optical traps, whose trapping sites are populated by aerosol droplets over time as shown in (c) and (d).Reprinted from Burnham and McGloin, Opt. Express 14, 4175–81. Copyright (2006) The Optical Society.