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Nanoscale Computer Operates at the Speed of Light

3/27/2022

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Predictions indicate that a nanometer-sized wave-based computer could solve equations in a fraction of the time of their larger, electronic counterparts.  
Booting up your laptop may seem like an instantaneous process, but in reality, it’s an intricate dance of signals being converted from analog waveforms to digital bytes to photons that deliver information to our retinas. For most computer uses, this conversion time has no impact. But for supercomputers crunching reams of data, it can create a serious, energy-consuming slowdown. Researchers are looking to solve this problem using analog, wave-based computers, which operate solely using light waves and can perform calculations faster and with less energy. Now, Heedong Goh and Andrea Alù from the Advanced Science Research Center at the City University of New York present the design for a nano-sized wave-based computer that can solve mathematical problems, such as integro-differential equations, at the speed of light.
One route that researchers have taken to make wave-based analog computers is to design them into metamaterials, materials engineered to apply mathematical operations to incident light waves. Previous designs used large-area metamaterials—up to two square feet ( ∼0.2 m2)—limiting their scalability. Goh and Alù have been able to scale down these structures to the nanoscale, a length scale suited for integration and scalability.
The duo’s proposed computer is made from silicon and is crafted in a complex geometrical nanoshape that is optimized for a given problem. Light is shone onto the computer, encoding the input, and the computer then encodes the solution to the problem onto the light it scatters. For example, the duo finds that a warped-trefoil structure can provide solutions to an integral equation known as the Fredholm equation.
Goh and Alù’s calculations show that their nano-sized wave-based computers should be able to solve problems with near-zero processing delay and with negligible energy consumption.

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    Rick Richardson, CPA, CITP, CGMA

    Rick is the editor of the weekly newsletter, Technology This Week. You can subscribe to it by visiting the website.

    Rick is also the Managing Partner of Richardson Media & Technologies, LLC. Prior to forming his current company, he had a 28-year career in technology with Ernst & Young, the last twelve years of which he served as National Director of Technology.

    Mr. Richardson has been named to the "Technology 100"- the annual honors list of the 100 key achievers in technology in America. He has also been honored by the American Institute of CPAs with two Lifetime Achievement awards and a Special Career Recognition Award for his contributions to the profession in the field of technology.

    In 2012, Rick was inducted into the Accounting Hall of Fame by CPA Practice Advisor Magazine. He has also been named to the 100 most influential individuals in the accounting profession in America by Accounting Today magazine.

    In 2017, Rick was inducted as a Marquis Who’s Who Lifetime Achiever, a registry of professionals who have excelled in their fields for many years and achieved greatness in their industry.

    He is a sought after speaker around the world, providing his annual forecast of future technology trends to thousands of business executives, professionals, community leaders, educators and students.

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