![With a nano-ring-based toroidal trap, cold polar molecules near the gray shaded surface approaching the central region may be trapped within a nanometer scale volume. With a nano-ring-based toroidal trap, cold polar molecules near the gray shaded surface approaching the central region may be trapped within a nanometer scale volume.](/sites/default/files/styles/list_page_thumbnail/public/news/images/Trapregion.jpg?itok=LKLv62M-)
Single atoms or molecules imprisoned by laser light in a doughnut-shaped metal cage could unlock the key to advanced storage devices, computers and high-resolution instruments.
In a paper published in Physical Review A, a team composed of Ali Passian of t