Researchers in the Faculty of Mechanical Engineering at the Technion - Israel Institute of Technology have developed a new physical model for controlling elastic wave propagation – a model that may potentially impact various applications, including acoustic cloaking, enhanced sensing, and energy tunneling. The development, which was published in , was headed by Professor Gal Shmuel and postdoc Dr. René Pernas-Salomón, in collaboration with Rutgers University Professor Andrew Norris and Professor Michael Haberman of Texas A&M University.
As part of their research, the Technion team developed a new class of metamaterials. These artificially engineered materials exhibit properties not found in natural materials. A prominent example of a metamaterial property is a negative effective mass, which models materials moving in the opposite direction to the force applied to them.
The team’s metamaterials possess a new metamaterial property, which they term electromomentum. In these metamaterials, momentum is coupled to applied electric fields in a form that does not occur in nature. The property describes the generation of a material’s momentum when it is subjected to an electric field. The momentum balance of a body determines how energy will flow through it in the form of elastic waves. Therefore, the electromomentum offers a new knob to control the energy flow and resultant waves by electrically controlling momentum.
Among the possible applications of the discovery is acoustic cloaking, in which an object is concealed when the acoustic waves generated around it are identical to the waves that would have been created if the object were not there. The electromomentum property brings us closer to the ability to mimic an environment of this kind by controlling the waves created by the object.
The research was sponsored by the Israel Science Foundation, the Israel Academy of Science and Humanities, the U.S. – Israel Binational Science Foundation (BSF), and the Ministry of Science and Technology.
For more than a century, the has pioneered in science and technology education and delivered world-changing impact. Proudly a global university, the Technion has long leveraged boundary-crossing collaborations to advance breakthrough research and technologies. Now with a presence in three countries, the Technion will prepare the next generation of global innovators. Technion people, ideas and inventions make immeasurable contributions to the world, innovating in fields from cancer research and sustainable energy to quantum computing and computer science to do good around the world.
The supports visionary education and world-changing impact through the Technion - Israel Institute of Technology. Based in New York City, we represent thousands of US donors, alumni and stakeholders who invest in the Technion’s growth and innovation to advance critical research and technologies that serve the State of Israel and the global good. Since 1940, our nationwide supporter network has funded new Technion scholarships, research, labs, and facilities that have helped deliver world-changing contributions and extend Technion education to campuses in three countries.
RSS