Nonlinear wave mixing facilitates subwavelength imaging

ScienceDaily
Apr 5, 2021, 11:36 am143 pts
A team of researchers recently developed an alternative way to break the Abbe diffraction limit and realize subwavelength imaging in an all-optical manner. They propose localized evanescent-wave illuminations, which are excited at the silicon surface by four-wave mixing, a third-order nonlinear optical process.

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