Research team makes breakthrough discovery in light interactions with nanoparticles, paving the way for advances in optical computing

A newly published paper in Physical Review Letters from researchers at the Advanced Science Research Center at the CUNY Graduate Center (CUNY ASRC) details a breakthrough discovery in nanomaterials and light-wave interactions that paves the way for development of small, low-energy optical computers capable of advanced computing.

"The increasing energy demands of large data centers and inefficiencies in current computing architectures have become a real challenge for our society," said Andrea Alù, Ph.D., the paper's corresponding author, founding director of the CUNY ASRC's Photonics Initiative and Einstein Professor of Physics at the Graduate Center. "Our work demonstrates that it's possible to design a nanoscale object that can efficiently interact with light to solve complex mathematical problems with unprecedented speeds and nearly zero energy demands."

In their study, CUNY ASRC researchers designed a nanoscale object made of silicon so that, when interrogated with light waves carrying an arbitrary input signal, it is able to encode the corresponding solution of a complex mathematical problem into the scattered light. The solution is calculated at the speed of light, and with minimal energy consumption."

"This finding is promising because it offers a practical pathway for creating a new generation of very energy-efficient, ultrafast, ultracompact nanoscale optical computers and other nanophotonic technologies that can be used for classical and quantum computations," said Heedong Goh, Ph.D., the paper's lead author and a postdoctoral research associate with Alù's lab. "The very small size of these nanoscale optical computers is particularly appealing for scalability, because multiple nanostructures can be combined and connected together through light scattering to realize complex nanoscale computing networks."