Coherent Control Of The Noninstantaneous Nonlinear Power-Law Response In Resonant Nanostructures
PHYSICAL REVIEW B(2020)
摘要
We experimentally demonstrate coherent control of the nonlinear response of optical second harmonic generation in resonant nanostructures beyond the weak-field regime. Contrary to common perception, we show that maximizing the intensity of the pulse does not yield the strongest nonlinear power-law response. We show this effect emerges from the temporally asymmetric photoinduced response in a resonant mediated noninstantaneous interaction. We develop a novel theoretical approach which captures the photoinduced nonlinearities in resonant nanostructures beyond the two photon description and give an intuitive picture to the observed noninstantaneous phenomena.
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