NEW YORK, August 30, 2019  — Light and sound waves are at the basis of energy and signal transport and fundamental to some of our most basic technologies — from cell phones to engines. Scientists, however, have yet to devise a method that allows them to store a wave intact for an indefinite period of time and then direct it toward a desired location on demand. Such a development would greatly facilitate the ability to manipulate waves for a variety of desired uses, including energy harvesting, quantum computing, structural-integrity monitoring, information storage, and more.