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More Is Less: Increased Voltage Switches Off Microlasers

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VIENNA, June 18, 2014 — Lasers that switch off when their pump power is increased could one day make viable optical switches and logic circuits. Researchers at the Vienna University of Technology, led by professor Stefan Rotter, have demonstrated the phenomenon using a pair of coupled microdisk quantum cascade lasers emitting at terahertz frequencies. The work builds on mathematical models devised by Hakan Türeci, assistant professor of electrical engineering at Princeton University. An electron microscope image shows two microdisk quantum cascade lasers placed 2 µm apart. Images courtesy of...Read full article

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