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Emory researchers have demonstrated unprecedented 500% intensity control over light in a nanoscale device using second harmonic generation, a breakthrough enabled by electrically tuning a process previously impossible at this scale. This advancement offers a path toward more flexible and efficient photonic technologies for communications, sensing, and quantum computing by overcoming critical materials science challenges in miniaturized tunneling junctions. The ability to dynamically switch and tune such a tiny light source represents a significant step forward in integrated photonic circuit design.

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Emory Achieves 500% Intensity Control of Nanoscale Light

Quantum ZeitgeistMay 29, 20265 min read

Emory University physicists have achieved 500% intensity control of light generated within a nanoscale device, a level of brightness tuning previously unattainable in such a small component. The integrated component, exceeding 100 times smaller than the width of a human hair at just over 200 nanometers, utilizes second harmonic generation to produce light, but with a crucial new capability. “Nobody had previously shown that you can tune second harmonic generation with an electric knob in such a small device,” says Hayk Harutyunyan, Emory professor of physics and senior author of the work published in Optica. With an active light-generating area…

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