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An international team led by researchers from the Skolkovo Institute of Science and Technology (Skoltech) has shown that the nonlinear optical response of carbon nanotubes — specifically, saturable absorption — can be controlled by electrochemical gating. The researchers applied their discovery to the design of a device for controlling laser pulse duration.
Saturable absorption is a nonlinear optical effect where the absorption coefficient decreases with the increasing power of incident light. Thus, the material becomes more transparent under intense laser radiation. “We showed that [the] magnitude of the nonlinear transparency can be controlled by placing the material in an electrochemical cell,” researcher…READ MORE