Optical trapping and manipulation of Hexogen particles

The microscopic explosion of energetic materials has been a hotspot in the research of energetic materials properties. Observing and analyzing the micro-feature of micro/nano-particles in energetic materials has become inevitable. The use of optical methods to manipulate and research various microscopic particles is a great mature technology Optical tweezers can trap, shift micro/nano-particles such as biological cells, standard particles, and absorptive particles. Therefore, using optical tweezers to study the micro-feature of energetic materials is a feasible method. In this paper, we propose and demonstrate the three-dimensional optical trapping and manipulation of irregular hexogen (RDX) particles in a liquid environment using the annular core fiber tweezers. A converging light field with a large-angle focus is obtained by assembling a high-refractive-index glass microsphere on the facet of annular core fiber. The proposed optical fiber tweezers have the advantages of large trapping stiffness, low cost, simple manufacturing. The optical trapping of RDX is beneficial to the research of RDX and has potential in the research of RDX micro-explosion.