Enhancement of Second-Order Nonlinear-Optical Signals by Optical Stimulation
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Comment on "Enhancement of Second-Order Nonlinear-Optical Signals by Optical Stimulation".
Second-order nonlinear optical interactions such as sum- and difference-frequency generation are widely used for bioimaging and as selective probes of interfacial environments. However, inefficient nonlinear optical conversion often leads to poor signal-to-noise ratio and long signal acquisition times. Here, we demonstrate the dramatic enhancement of weak second-order nonlinear optical signals ...
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