Controlling steady-state second harmonic signal via linear and nonlinear Fano resonances

Guenay, Mehmet
Artvin, Zafer
Bek, Alpan
Nonlinear signal even from a single molecule becomes visible at hot spots of plasmonic nanoparticles. In these structures, Fano resonances can control the nonlinear response in two ways. (i) A linear Fano resonance can enhance the hot spot field, resulting enhanced nonlinear signal. (ii) A nonlinear Fano resonance can enhance the nonlinear signal without enhancing the hot spot. In this study, we compare the enhancement of second harmonic signal at the steady-state obtained via these two methods. Since we are interested in the steady-state signal, we adapt a linear enhancement which works at the steady-state. This is different than the dark-hot resonances that appear in the transparency window due to enhanced plasmon lifetime.


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Citation Formats
M. Guenay, Z. Artvin, A. Bek, and M. E. TAŞGIN, “Controlling steady-state second harmonic signal via linear and nonlinear Fano resonances,” JOURNAL OF MODERN OPTICS, pp. 26–34, 2020, Accessed: 00, 2020. [Online]. Available: