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June 14, 2016 02:00 am

Scientists Amplify Light Using Sound On a Silicon Chip

An anonymous reader quotes a report from Phys.Org: Yale scientists have found a way to greatly boost the intensity of light waves on a silicon microchip using the power of sound. Writing in the journal Nature Photonics, a team led by Peter Rakich describes a new waveguide system that harnesses the ability to precisely control the interaction of light and sound waves. "Silicon is the basis for practically all microchip technologies," said Rakich, who is an assistant professor of applied physics and physics at Yale. "The ability to combine both light and sound in silicon permits us to control and process information in new ways that weren't otherwise possible." Rakich said combining the two capabilities "is like giving a UPS driver an amphibious vehicle -- you can find a much more efficient route for delivery when traveling by land or water." "Figuring out how to shape this interaction without losing amplification was the real challenge," said Eric Kittlaus, a graduate student in Rakich's lab and the study's first author. "With precise control over the light-sound interaction, we will be able to create devices with immediate practical uses, including new types of lasers." The researchers said there are commercial applications for the technology in a number of areas, including fiber-optic communications and signal processing. The system is part of a larger body of research the Rakich lab has conducted for the past five years, focused on designing new microchip technologies for light.

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