Cartoon of the second-harmonic field generated from a bound state in the continuum in a subwavelength dielectric nanoparticle.
From the article:
Giant Nonlinear Response at the Nanoscale Driven by Bound States in the ContinuumLuca Carletti, Kirill Koshelev, Costantino De Angelis, and Yuri Kivshar
Phys. Rev. Lett. 121, 033903 (2018)
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